General Description
The MAX220–MAX249 family of line drivers/receivers is
intended for all EIA/TIA-232E and V.28/V.24 communica-
tions interfaces, particularly applications where ±12V is
not available.
These parts are especially useful in battery-powered sys-
tems, since their low-power shutdown mode reduces
power dissipation to less than 5µW. The MAX225,
MAX233, MAX235, and MAX245/MAX246/MAX247 use
no external components and are recommended for appli-
cations where printed circuit board space is critical.
________________________Applications
Portable Computers
Low-Power Modems
Interface Translation
Battery-Powered RS-232 Systems
Multi-Drop RS-232 Networks
____________________________Features
Superior to Bipolar
♦
Operate from Single +5V Power Supply
(+5V and +12V—MAX231/MAX239)
♦
Low-Power Receive Mode in Shutdown
(MAX223/MAX242)
♦
Meet All EIA/TIA-232E and V.28 Specifications
♦
Multiple Drivers and Receivers
♦
3-State Driver and Receiver Outputs
♦
Open-Line Detection (MAX243)
Ordering Information
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
________________________________________________________________
Maxim Integrated Products
1
Selection Table
19-4323; Rev 7b; 11/97
PART
MAX220
CPE
MAX220CSE
MAX220CWE
0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Wide SO
MAX220C/D
0°C to +70°C
Dice*
MAX220EPE
MAX220ESE
MAX220EWE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
16 Plastic DIP
16 Narrow SO
16 Wide SO
MAX220EJE
-40°C to +85°C
16 CERDIP
MAX220MJE
-55°C to +125°C
16 CERDIP
Power
No. of
Nominal
SHDN
Rx
Part
Supply
RS-232
No. of
Cap. Value & Three- Active in Data Rate
Number
(V)
Drivers/Rx Ext. Caps (µF)
State
SHDN
(kbps)
Features
MAX220
+5
2/2
4
4.7/10
No
—
120
Ultra-low-power, industry-standard pinout
MAX222
+5
2/2
4 0.1
Yes
—
200
Low-power
shutdown
MAX223 (MAX213) +5
4/5
4
1.0 (0.1)
Yes
✔
120
MAX241 and receivers active in shutdown
MAX225
+5
5/5
0
—
Yes
✔
120
Available in SO
MAX230 (MAX200) +5
5/0
4
1.0 (0.1)
Yes
—
120
5 drivers with shutdown
MAX231 (MAX201) +5 and
2/2
2
1.0 (0.1)
No
—
120
Standard +5/+12V or battery supplies;
+7.5 to +13.2
same functions as MAX232
MAX232 (MAX202) +5
2/2
4
1.0 (0.1)
No
—
120 (64)
Industry standard
MAX232A
+5
2/2
4
0.1
No
—
200
Higher slew rate, small caps
MAX233 (MAX203) +5
2/2
0
—
No
—
120
No external caps
MAX233A
+5
2/2
0
—
No
—
200
No external caps, high slew rate
MAX234 (MAX204) +5
4/0
4
1.0 (0.1)
No
—
120
Replaces 1488
MAX235 (MAX205) +5
5/5
0
—
Yes
—
120
No external caps
MAX236 (MAX206) +5
4/3
4
1.0 (0.1)
Yes
—
120
Shutdown, three state
MAX237 (MAX207) +5
5/3
4
1.0 (0.1)
No
—
120
Complements IBM PC serial port
MAX238 (MAX208) +5
4/4
4
1.0 (0.1)
No
—
120
Replaces 1488 and 1489
MAX239 (MAX209) +5 and
3/5
2
1.0 (0.1)
No
—
120
Standard +5/+12V or battery supplies;
+7.5 to +13.2
single-package solution for IBM PC serial port
MAX240
+5
5/5
4
1.0
Yes
—
120
DIP or flatpack package
MAX241 (MAX211) +5
4/5
4
1.0 (0.1)
Yes
—
120
Complete IBM PC serial port
MAX242
+5
2/2
4
0.1
Yes
✔
200
Separate shutdown and enable
MAX243
+5
2/2
4
0.1
No
—
200
Open-line detection simplifies cabling
MAX244
+5
8/10
4
1.0
No
—
120
High slew rate
MAX245
+5
8/10
0
—
Yes
✔
120
High slew rate, int. caps, two shutdown modes
MAX246
+5
8/10
0
—
Yes
✔
120
High slew rate, int. caps, three shutdown modes
MAX247
+5
8/9
0
—
Yes
✔
120
High slew rate, int. caps, nine operating modes
MAX248
+5
8/8
4
1.0
Yes
✔
120
High slew rate, selective half-chip enables
MAX249
+5
6/10
4
1.0
Yes
✔
120
Available in quad flatpack package
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.)
Note 1:
Input voltage measured with T
OUT
in high-impedance state,
SHDN or V
CC
= 0V.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (V
CC
) ...............................................-0.3V to +6V
Input Voltages
T
IN
..............................................................-0.3V to (V
CC
- 0.3V)
R
IN
.....................................................................................±30V
T
OUT
(Note 1).....................................................................±15V
Output Voltages
T
OUT
...................................................................................±15V
R
OUT
.........................................................-0.3V to (V
CC
+ 0.3V)
Driver/Receiver Output Short Circuited to GND.........Continuous
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW
20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ....440mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW
18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW
20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW
18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW
Operating Temperature Ranges
MAX2_ _AC_ _, MAX2_ _C_ _ .............................0°C to +70°C
MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40°C to +85°C
MAX2_ _AM_ _, MAX2_ _M_ _ .......................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
V
1.4
0.8
Input Logic Threshold Low
V
±5
±8
Output Voltage Swing
UNITS
MIN
TYP
MAX
PARAMETER
CONDITIONS
All transmitter outputs loaded with 3k
Ω
to GND
Input Logic Threshold High
2
1.4
V
Normal operation
5
40
Logic Pull-Up/lnput Current
SHDN = 0V, MAX222/242, shutdown
±0.01
±1
µA
V
CC
= 5.5V, SHDN = 0V, V
OUT
= ±15V, MAX222/242
±0.01
±10
Output Leakage Current
V
CC
= SHDN = 0V, V
OUT
= ±15V
±0.01
±10
µA
All except MAX220, normal operation
200
116
Data Rate
MAX220
22
20
kbits/
sec
Transmitter Output Resistance
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
300
10M
Ω
Output Short-Circuit Current
V
OUT
= 0V
±7
±22
mA
RS-232 Input Voltage Operating Range
±30
V
All except MAX243 R2
IN
0.8
1.3
RS-232 Input Threshold Low
V
CC
= 5V
MAX243 R2
IN
(Note 2)
-3
V
All except MAX243 R2
IN
1.8
2.4
RS-232 Input Threshold High
V
CC
= 5V
MAX243 R2
IN
(Note 2)
-0.5
-0.1
V
All except MAX243, V
CC
= 5V, no hysteresis in shdn.
0.2
0.5
1
RS-232 Input Hysteresis
MAX243
1
V
RS-232 Input Resistance
3
5
7
k
Ω
TTL/CMOS Output Voltage Low
I
OUT
= 3.2mA
0.2
0.4
V
TTL/CMOS Output Voltage High
I
OUT
= -1.0mA
3.5
V
CC
- 0.2
V
Sourcing V
OUT
= GND
-2
-10
mA
TTL/CMOS Output Short-Circuit Current
Shrinking V
OUT
= V
CC
10
30
TTL/CMOS Output Leakage Current
SHDN = V
CC
or EN = V
CC
(SHDN = 0V for MAX222),
0V
≤
V
OUT
≤
V
CC
±0.05
±10
µA
RS-232 TRANSMITTERS
RS-232 RECEIVERS
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________
3
Note 2:
MAX243 R2
OUT
is guaranteed to be low when R2
IN
is
≥
0V or is floating.
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.)
Operating Supply Voltage
SHDN Threshold High
4.5
5.5
V
MAX222/242
Transmitter-Output Enable Time
(SHDN goes high), Figure 4
2.0
1.4
V
MAX220
0.5
2
t
ET
No load
MAX222/232A/233A/242/243
4
10
MAX222/232A/233A/242/243
6
12
30
MAX220
12
V
CC
Supply Current (SHDN = V
CC
),
Figures 5, 6, 11, 19
3k
Ω
load
both inputs
MAX222/232A/233A/242/243
15
mA
Transition Slew Rate
T
A
= +25°C
0.1
10
C
L
= 50pF to 2500pF,
R
L
= 3k
Ω
to 7k
Ω
,
V
CC
= 5V, T
A
= +25°C,
measured from +3V
to -3V or -3V to +3V
T
A
= 0°C to +70°C
CONDITIONS
2
50
MAX220
1.5
3
30
V/µs
T
A
= -40°C to +85°C
2
50
MAX222/242, 0.1µF caps
(includes charge-pump start-up)
Shutdown Supply Current
MAX222/242
T
A
= -55°C to +125°C
35
100
µA
SHDN Input Leakage Current
MAX222/242
±1
µA
SHDN Threshold Low
MAX222/242
1.4
0.8
V
250
MAX222/232A/233A/242/243
1.3
3.5
µs
t
PHLT
MAX220
4
10
Transmitter-Output Disable Time
(SHDN goes low), Figure 4
t
DT
MAX222/232A/233A/242/243
1.5
3.5
Transmitter Propagation Delay
TLL to RS-232 (normal operation),
Figure 1
t
PLHT
MAX220
5
10
µs
V
2.0
1.4
MAX222/242, 0.1µF caps
V
1.4
0.8
600
EN Input Threshold Low
EN Input Threshold High
MAX222/232A/233A/242/243
0.5
1
ns
t
PHLR
MAX220
0.6
3
t
PLHR
MAX222/232A/233A/242/243
0.6
1
Receiver Propagation Delay
RS-232 to TLL (normal operation),
Figure 2
t
PHLT
- t
PLHT
MAX220
0.8
3
µs
MAX222/232A/233A/242/243
t
PHLS
MAX242
0.5
10
Receiver Propagation Delay
RS-232 to TLL (shutdown), Figure 2
t
PLHS
MAX242
2.5
10
µs
Receiver-Output Enable Time, Figure 3 t
ER
MAX242
UNITS
MIN
TYP
MAX
125
500
PARAMETER
MAX242
ns
MAX242
Receiver-Output Disable Time, Figure 3 t
DR
MAX242
160
500
ns
300
ns
Transmitter + to - Propagation
Delay Difference (normal operation)
MAX220
2000
t
PHLR
- t
PLHR
MAX222/232A/233A/242/243
100
ns
Receiver + to - Propagation
Delay Difference (normal operation)
MAX220
225
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
4
_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
10
8
-10
0
5
15
25
OUTPUT VOLTAGE vs. LOAD CURRENT
-4
-6
-8
-2
6
4
2
MAX220-01
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
10
0
20
0.1
µ
F
EITHER V+ OR V- LOADED
V
CC
= ±5V
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)
V- LOADED, NO LOAD ON V+
V+ LOADED, NO LOAD ON V-
1
µ
F
1
µ
F
0.1
µ
F
11
10
4
0
10
40
60
AVAILABLE OUTPUT CURRENT
vs. DATA RATE
6
5
7
9
8
MAX220-02
DATA RATE (kbits/sec)
OUTPUT CURRENT (mA)
20
30
50
OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-
V
CC
= +5.25V
ALL CAPS
1
µ
F
ALL CAPS
0.1
µ
F
V
CC
= +4.75V
+10V
-10V
MAX222/MAX242
ON-TIME EXITING SHUTDOWN
+5V
+5V
0V
0V
MAX220-03
500
µ
s/div
V+, V- VOLTAGE (V)
1
µ
F CAPS
V+
V+
V-
V-
SHDN
0.1
µ
F CAPS
1
µ
F CAPS
0.1
µ
F CAPS
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________
5
V
CC
...........................................................................-0.3V to +6V
V+ ................................................................(V
CC
- 0.3V) to +14V
V- ............................................................................+0.3V to -14V
Input Voltages
T
IN
............................................................-0.3V to (V
CC
+ 0.3V)
R
IN
......................................................................................±30V
Output Voltages
T
OUT
...................................................(V+ + 0.3V) to (V- - 0.3V)
R
OUT
.........................................................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration, T
OUT
......................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW
20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW
24-Pin Narrow Plastic DIP
(derate 13.33mW/°C above +70°C) ..........1.07W
24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW
20-Pin Wide SO (derate 10 00mW/°C above +70°C).......800mW
24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW
28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W
44-Pin Plastic FP (derate 11.11mW/°C above +70°C) .....889mW
14-Pin CERDIP (derate 9.09mW/°C above +70°C) ..........727mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C) ........800mW
20-Pin CERDIP (derate 11.11mW/°C above +70°C) ........889mW
24-Pin Narrow CERDIP
(derate 12.50mW/°C above +70°C) ..............1W
24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W
28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW
Operating Temperature Ranges
MAX2 _ _ C _ _......................................................0°C to +70°C
MAX2 _ _ E _ _ ...................................................-40°C to +85°C
MAX2 _ _ M _ _ ...............................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241
ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241
(MAX223/230/232/234/236/237/238/240/241, V
CC
= +5V ±10; MAX233/MAX235, V
CC
= 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,
V
CC
= 5V ±10%; V+ = 7.5V to 13.2V; T
A
= T
MIN
to T
MAX
; unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage Swing
All transmitter outputs loaded with 3k
Ω
to ground
±5.0
±7.3
V
V
CC
Power-Supply Current
No load,
T
A
= +25°C
5
10
mA
7
15
0.4
1
V+ Power-Supply Current
1.8
5
mA
5
15
Shutdown Supply Current
T
A
= +25°C
15
50
V
Input Logic Threshold High
T
IN
2.0
EN, SHDN (MAX223);
EN, SHDN (MAX230/235/236/240/241)
2.4
Logic Pull-Up Current
T
IN
= 0V
1.5
200
Receiver Input Voltage
Operating Range
-30
30
V
µA
µA
1
10
V
Input Logic Threshold Low
T
IN
; EN, SHDN (MAX233); EN, SHDN (MAX230/235–241)
0.8
MAX231/239
MAX223/230/234–238/240/241
MAX232/233
PARAMETER
MAX239
MAX230/235/236/240/241
MAX231
MAX223
mA
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
6
_______________________________________________________________________________________
V
0.8
1.2
PARAMETER
MIN
TYP
MAX
UNITS
CONDITIONS
Normal operation
SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)
1.7
2.4
RS-232 Input Threshold Low
T
A
= +25°C,
V
CC
= 5V
0.6
1.5
V
RS-232 Input Threshold High
T
A
= +25°C,
V
CC
= 5V
Shutdown (MAX223)
SHDN = 0V,
EN = 5V (R4
IN
‚ R5
IN
)
1.5
2.4
ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)
(MAX223/230/232/234/236/237/238/240/241, V
CC
= +5V ±10; MAX233/MAX235, V
CC
= 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,
V
CC
= 5V ±10%; V+ = 7.5V to 13.2V; T
A
= T
MIN
to T
MAX
; unless otherwise noted.)
Shutdown (MAX223)
SHDN = 0V,
EN = 5V (R4
IN
, R5
IN
)
Normal operation
SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)
RS-232 Input Hysteresis
V
CC
= 5V, no hysteresis in shutdown
0.2
0.5
1.0
V
RS-232 Input Resistance
T
A
= +25°C, V
CC
= 5V
3
5
7
k
Ω
TTL/CMOS Output Voltage Low
I
OUT
= 1.6mA (MAX231/232/233, I
OUT
= 3.2mA)
0.4
V
TTL/CMOS Output Voltage High
I
OUT
= -1mA
3.5
V
CC
- 0.4
V
TTL/CMOS Output Leakage Current
0V
≤
R
OUT
≤
V
CC
; EN = 0V (MAX223);
EN = V
CC
(MAX235–241 )
0.05
±10
µA
MAX223
600
ns
Receiver Output Enable Time
Normal
operation
MAX235/236/239/240/241
400
MAX223
900
ns
Receiver Output Disable Time
Normal
operation
MAX235/236/239/240/241
250
Normal operation
0.5
10
µs
SHDN = 0V
(MAX223)
4
40
Propagation Delay
RS-232 IN to
TTL/CMOS OUT,
C
L
= 150pF
6
40
3
5.1
30
V/µs
MAX231/MAX232/MAX233, T
A
= +25°C, V
CC
= 5V,
R
L
= 3k
Ω
to 7k
Ω
, C
L
= 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
4
30
Transmitter Output Resistance
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
300
Ω
Transmitter Output Short-Circuit
Current
±10
mA
t
PHLS
t
PLHS
Transition Region Slew Rate
MAX223/MAX230/MAX234–241, T
A
= +25°C, V
CC
= 5V,
R
L
= 3k
Ω
to 7k
Ω
‚ C
L
= 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________
7
8.5
6.5
4.5
5.5
TRANSMITTER OUTPUT
VOLTAGE (V
OH
) vs. V
CC
7.0
8.0
MAX220-04
V
CC
(V)
V
OH
(V)
5.0
7.5
1 TRANSMITTER
LOADED
3 TRANS-
MITTERS
LOADED
4 TRANSMITTERS
LOADED
2 TRANSMITTERS
LOADED
T
A
= +25°C
C1–C4 = 1
µ
F
TRANSMITTER
LOADS =
3k
Ω
|| 2500pF
7.4
6.0
0
2500
TRANSMITTER OUTPUT VOLTAGE (V
OH
)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
6.4
6.2
7.2
7.0
MAX220-05
LOAD CAPACITANCE (pF)
V
OH
(V)
1500
1000
500
2000
6.8
6.6
160kbits/sec
80kbits/sec
20kbits/sec
T
A
= +25°C
V
CC
= +5V
3 TRANSMITTERS LOADED
R
L
= 3k
Ω
C1–C4 = 1
µ
F
12.0
4.0
0
2500
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
6.0
5.0
11.0
9.0
10.0
MAX220-06
LOAD CAPACITANCE (pF)
SLEW RATE (V/
µ
s)
1500
1000
500
2000
8.0
7.0
T
A
= +25°C
V
CC
= +5V
LOADED, R
L
= 3k
Ω
C1–C4 = 1
µ
F
1 TRANSMITTER LOADED
2 TRANSMITTERS
LOADED
3 TRANSMITTERS
LOADED
4 TRANSMITTERS
LOADED
-6.0
-9.0
4.5
5.5
TRANSMITTER OUTPUT
VOLTAGE (V
OL
) vs. V
CC
-8.0
-8.5
-6.5
-7.0
MAX220-07
V
CC
(V)
V
OL
(V)
5.0
-7.5
4 TRANS-
MITTERS
LOADED
T
A
= +25°C
C1–C4 = 1
µ
F
TRANSMITTER
LOADS =
3k
Ω
|| 2500pF
1 TRANS-
MITTER
LOADED
2 TRANS-
MITTERS
LOADED
3 TRANS-
MITTERS
LOADED
-6.0
-7.6
0
2500
TRANSMITTER OUTPUT VOLTAGE (V
OL
)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
-7.0
-7.2
-7.4
-6.2
-6.4
MAX220-08
LOAD CAPACITANCE (pF)
V
OL
(V)
1500
1000
500
2000
-6.6
-6.8
160kbits/sec
80kbits/sec
20Kkbits/sec
T
A
= +25°C
V
CC
= +5V
3 TRANSMITTERS LOADED
R
L
= 3k
Ω
C1–C4 = 1
µ
F
10
-10
0
5
10 15 20
25 30
35 40 45 50
TRANSMITTER OUTPUT VOLTAGE (V+, V-)
vs. LOAD CURRENT
-2
-6
-4
-8
8
6
MAX220-09
CURRENT (mA)
V+, V- (V)
4
2
0
V+ AND V-
EQUALLY
LOADED
V- LOADED,
NO LOAD
ON V+
T
A
= +25°C
V
CC
= +5V
C1–C4 = 1
µ
F
ALL TRANSMITTERS UNLOADED
V+ LOADED,
NO LOAD
ON V-
__________________________________________Typical Operating Characteristics
MAX223/MAX230–MAX241
*SHUTDOWN POLARITY IS REVERSED
FOR NON MAX241 PARTS
V+, V- WHEN EXITING SHUTDOWN
(1
µ
F CAPACITORS)
MAX220-13
SHDN*
V-
O
V+
500ms/div
Input Logic Threshold Low
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
8
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249
ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249
(MAX225, V
CC
= 5.0V ±5%; MAX244–MAX249, V
CC
= +5.0V ±10%, external capacitors C1–C4 = 1µF; T
A
= T
MIN
to T
MAX
; unless oth-
erwise noted.)
Note 3:
Input voltage measured with transmitter output in a high-impedance state, shutdown, or V
CC
= 0V.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (V
CC
) ...............................................-0.3V to +6V
Input Voltages
T
IN
‚ ENA, ENB, ENR, ENT, ENRA,
ENRB, ENTA, ENTB..................................-0.3V to (V
CC
+ 0.3V)
R
IN
.....................................................................................±25V
T
OUT
(Note 3).....................................................................±15V
R
OUT
........................................................-0.3V to (V
CC
+ 0.3V)
Short Circuit (one output at a time)
T
OUT
to GND ............................................................Continuous
R
OUT
to GND............................................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W
40-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...611mW
44-Pin PLCC (derate 13.33mW/°C above +70°C) ...........1.07W
Operating Temperature Ranges
MAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C
MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering,10sec) ..............................+300°C
V
CC
= 0V,
V
OUT
= ±15V
µA
Tables 1a–1d
±0.01
±25
Normal operation
Shutdown
Tables 1a–1d, normal operation
All transmitter outputs loaded with 3k
Ω
to GND
ENA, ENB, ENT, ENTA, ENTB =
V
CC,
V
OUT
= ±15V
V
RS-232 Input Hysteresis
RS-232 Input Threshold Low
V
V
±5
±7.5
Output Voltage Swing
Output Leakage Current (shutdown)
±0.01
±25
Ω
300
10M
V
CC
= V+ = V- = 0V, V
OUT
= ±2V (Note 4)
Transmitter Output Resistance
µA
PARAMETER
±0.05
±0.10
MIN
TYP
MAX
UNITS
Normal operation, outputs disabled,
Tables 1a–1d, 0V
≤
V
OUT
≤
V
CC
, ENR_ = V
CC
TTL/CMOS Output Leakage Current
10
30
Shrinking V
OUT
= V
CC
mA
-2
-10
Sourcing V
OUT
= GND
V
3.5
V
CC
- 0.2
I
OUT
= -1.0mA
TTL/CMOS Output Voltage High
V
0.2
0.4
I
OUT
= 3.2mA
TTL/CMOS Output Voltage Low
k
Ω
3
5
7
0.2
0.5
1.0
V
CC
= 5V
1.4
0.8
V
TTL/CMOS Output Short-Circuit Current
V
1.8
2.4
0.8
1.3
V
CC
= 5V
RS-232 Input Resistance
V
±25
RS-232 Input Voltage Operating Range
mA
±7
±30
V
OUT
= 0V
Output Short-Circuit Current
kbits/sec
120
64
Data Rate
CONDITIONS
V
CC
= 5V
µA
±0.01
±1
Logic Pull-Up/lnput Current
10
50
Tables 1a–1d
RS-232 Input Threshold High
V
2
1.4
Input Logic Threshold High
RS-232 TRANSMITTERS
RS-232 RECEIVERS
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________
9
Operating Supply Voltage
4.75
5.25
V
Transmitter Enable Time
MAX225
10
20
t
ET
No load
MAX244–MAX249
11
30
5
10
30
MAX225
40
V
CC
Supply Current
(normal operation)
3k
Ω
loads on
all outputs
MAX244–MAX249
57
mA
Transition Slew Rate
8
25
C
L
= 50pF to 2500pF, R
L
= 3k
Ω
to 7k
Ω
, V
CC
= 5V,
T
A
= +25°C, measured from +3V to -3V or -3V to +3V
T
A
= T
MIN
to T
MAX
CONDITIONS
50
V/µs
MAX246–MAX249
(excludes charge-pump start-up)
Shutdown Supply Current
µA
5
t
PHLT
1.3
3.5
µs
t
PLHT
1.5
3.5
Transmitter Disable Time, Figure 4
Transmitter Propagation Delay
TLL to RS-232 (normal operation),
Figure 1
µs
t
DT
100
ns
Transmitter + to - Propagation
Delay Difference (normal operation)
t
PHLT
- t
PLHT
UNITS
MIN
TYP
MAX
350
PARAMETER
ns
Receiver + to - Propagation
Delay Difference (normal operation)
t
PHLR
- t
PLHR
350
ns
4.5
5.5
MAX244–MAX249
MAX225
Leakage current
±1
Threshold low
1.4
0.8
Control Input
Threshold high
2.4
1.4
V
µA
T
A
= +25°C
t
PHLR
0.6
1.5
t
PLHR
0.6
1.5
Receiver Propagation Delay
TLL to RS-232 (normal operation),
Figure 2
µs
t
PHLS
0.6
10
t
PLHS
3.0
10
Receiver Propagation Delay
TLL to RS-232 (low-power mode),
Figure 2
µs
Receiver-Output Enable Time, Figure 3 t
ER
100
500
ns
Receiver-Output Disable Time, Figure 3 t
DR
100
500
ns
MAX225/MAX245–MAX249
(includes charge-pump start-up)
10
ms
POWER SUPPLY AND CONTROL LOGIC
AC CHARACTERISTICS
Note 4:
The 300
Ω
minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or V
CC
=
0V is 10M
Ω
as is implied by the leakage specification.
ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)
(MAX225, V
CC
= 5.0V ±5%; MAX244–MAX249, V
CC
= +5.0V ±10%, external capacitors C1–C4 = 1µF; T
A
= T
MIN
to T
MAX
; unless oth-
erwise noted.)
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
10
______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
MAX225/MAX244–MAX249
18
2
0
1
2
3
4
5
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
8
6
4
16
MAX220-10
LOAD CAPACITANCE (nF)
TRANSMITTER SLEW RATE (V/
µ
s)
14
12
10
V
CC
= 5V
EXTERNAL POWER SUPPLY
1
µ
F CAPACITORS
40kb/s DATA RATE
8 TRANSMITTERS
LOADED WITH 3k
Ω
10
-10
0
5
10
15
20
25
30
35
OUTPUT VOLTAGE
vs. LOAD CURRENT FOR V+ AND V-
-2
-4
-6
-8
8
MAX220-11
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
6
4
2
0
V+ AND V- LOADED
EITHER V+ OR
V- LOADED
V+ AND V- LOADED
V
CC
= 5V
EXTERNAL CHARGE PUMP
1
µ
F CAPACITORS
8 TRANSMITTERS
DRIVING 5k
Ω
AND
2000pF AT 20kbits/sec
V- LOADED
V+ LOADED
9.0
5.0
0
1
2
3
4
5
TRANSMITTER OUTPUT VOLTAGE (V+, V-)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
6.0
5.5
8.5
MAX220-12
LOAD CAPACITANCE (nF)
V+, V (V)
8.0
7.5
7.0
6.5
V
CC
= 5V WITH ALL TRANSMITTERS DRIVEN
LOADED WITH 5k
Ω
10kb/sec
20kb/sec
40kb/sec
60kb/sec
100kb/sec
200kb/sec
ALL CAPACITIORS 1
µ
F
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
11
INPUT
OUTPUT
+3V
V+
0V
V-
0V
t
PLHT
t
PHLT
t
PHLR
t
PHLS
t
PLHR
t
PLHS
50%
V
CC
50%
+3V
50%
INPUT
OUTPUT
*EXCEPT FOR R2 ON THE MAX243
WHERE -3V IS USED.
0V*
50%
GND
Figure 1. Transmitter Propagation-Delay Timing
Figure 2. Receiver Propagation-Delay Timing
EN
R
X
IN
a) TEST CIRCUIT
b) ENABLE TIMING
c) DISABLE TIMING
EN INPUT
RECEIVER
OUTPUTS
R
X
OUT
R
X
1k
0V
+3V
EN
EN
+0.8V
+3.5V
OUTPUT ENABLE TIME (t
ER
)
V
CC
- 2V
V
OL
+ 0.5V
V
OH
- 0.5V
OUTPUT DISABLE TIME (t
DR
)
V
CC
- 2V
+3V
0V
150pF
EN INPUT
V
OH
RECEIVER
OUTPUTS
V
OL
1 OR 0
T
X
3k
50pF
-5V
+5V
OUTPUT DISABLE TIME (t
DT
)
V+
SHDN
+3V
0V
V-
0V
a) TIMING DIAGRAM
b) TEST CIRCUIT
Figure 3. Receiver-Output Enable and Disable Timing
Figure 4. Transmitter-Output Disable Timing
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
12
______________________________________________________________________________________
ENT
ENR
OPERATION STATUS
TRANSMITTERS
RECEIVERS
0
0
Normal Operation
All Active
All Active
0
1
Normal Operation
All Active
All 3-State
1
0
Shutdown
All 3-State
All Low-Power Receive Mode
1
1
Shutdown
All 3-State
All 3-State
Table 1a. MAX245 Control Pin Configurations
ENT
ENR
OPERATION
STATUS
TRANSMITTERS
RECEIVERS
TA1–TA4
TB1–TB4
RA1–RA5
RB1–RB5
0
0
Normal Operation
All Active
All Active
All Active
All Active
0
1
Normal Operation
All Active
All Active
RA1–RA4 3-State,
RA5 Active
RB1–RB4 3-State,
RB5 Active
1
0
Shutdown
All 3-State
All 3-State
All Low-Power
Receive Mode
All Low-Power
Receive Mode
1
1
Shutdown
All 3-State
All 3-State
RA1–RA4 3-State,
RA5 Low-Power
Receive Mode
RB1–RB4 3-State,
RB5 Low-Power
Receive Mode
Table 1b. MAX245 Control Pin Configurations
Table 1c. MAX246 Control Pin Configurations
ENA
ENB
OPERATION
STATUS
TRANSMITTERS
RECEIVERS
TA1–TA4
TB1–TB4
RA1–RA5
RB1–RB5
0
0
Normal Operation
All Active
All Active
All Active
All Active
0
1
Normal Operation
All Active
All 3-State
All Active
RB1–RB4 3-State,
RB5 Active
1
0
Shutdown
All 3-State
All Active
RA1–RA4 3-State,
RA5 Active
All Active
1
1
Shutdown
All 3-State
All 3-State
RA1–RA4 3-State,
RA5 Low-Power
Receive Mode
RB1–RB4 3-State,
RA5 Low-Power
Receive Mode
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
13
TA1–TA4
TB1–TB4
RA1–RA4
RB1–RB4
0
0
0
0
Normal Operation
All Active
All Active
All Active
All Active
0
0
0
1
Normal Operation
All Active
All Active
All Active
All 3-State, except
RB5 stays active on
MAX247
0
0
1
0
Normal Operation
All Active
All Active
All 3-State
All Active
0
0
1
1
Normal Operation
All Active
All Active
All 3-State
All 3-State, except
RB5 stays active on
MAX247
0
1
0
0
Normal Operation
All Active
All 3-State
All Active
All Active
0
1
0
1
Normal Operation
All Active
All 3-State
All Active
All 3-State, except
RB5 stays active on
MAX247
0
1
1
0
Normal Operation
All Active
All 3-State
All 3-State
All Active
0
1
1
1
Normal Operation
All Active
All 3-State
All 3-State
All 3-State, except
B5 stays active on
MAX247
1
0
0
0
Normal Operation
All 3-State
All Active
All Active
All Active
1
0
0
1
Normal Operation
All 3-State
All Active
All Active
All 3-State, except
RB5 stays active on
MAX247
1
0
1
0
Normal Operation
All 3-State
All Active
All 3-State
All Active
1
0
1
1
Normal Operation
All 3-State
All Active
All 3-State
All 3-State, except
RB5 stays active on
MAX247
1
1
0
0
Shutdown
All 3-State
All 3-State
Low-Power
Receive Mode
Low-Power
Receive Mode
1
1
0
1
Shutdown
All 3-State
All 3-State
Low-Power
Receive Mode
All 3-State, except
RB5 stays active on
MAX247
1
1
1
0
Shutdown
All 3-State
All 3-State
All 3-State
Low-Power
Receive Mode
1
1
1
1
Shutdown
All 3-State
All 3-State
All 3-State
All 3-State, except
RB5 stays active on
MAX247
Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations
MAX248
OPERATION
STATUS
ENRB
MAX247
TA1–TA4
TB1–TB4
RA1–RA4
RB1–RB5
TRANSMITTERS
ENRA
ENTB
ENTA
MAX249
TA1–TA3
TB1–TB3
RA1–RA5
RB1–RB5
RECEIVERS
MAX220–MAX249
_______________Detailed Description
The MAX220–MAX249 contain four sections: dual
charge-pump DC-DC voltage converters, RS-232 dri-
vers, RS-232 receivers, and receiver and transmitter
enable control inputs.
Dual Charge-Pump Voltage Converter
The MAX220–MAX249 have two internal charge-pumps
that convert +5V to ±10V (unloaded) for RS-232 driver
operation. The first converter uses capacitor C1 to dou-
ble the +5V input to +10V on C3 at the V+ output. The
second converter uses capacitor C2 to invert +10V to
-10V on C4 at the V- output.
A small amount of power may be drawn from the +10V
(V+) and -10V (V-) outputs to power external circuitry
(see the
Typical Operating Characteristics section),
except on the MAX225 and MAX245–MAX247, where
these pins are not available. V+ and V- are not regulated,
so the output voltage drops with increasing load current.
Do not load V+ and V- to a point that violates the mini-
mum ±5V EIA/TIA-232E driver output voltage when
sourcing current from V+ and V- to external circuitry.
When using the shutdown feature in the MAX222,
MAX225, MAX230, MAX235, MAX236, MAX240,
MAX241, and MAX245–MAX249, avoid using V+ and V-
to power external circuitry. When these parts are shut
down, V- falls to 0V, and V+ falls to +5V. For applica-
tions where a +10V external supply is applied to the V+
pin (instead of using the internal charge pump to gen-
erate +10V), the C1 capacitor must not be installed and
the SHDN pin must be tied to V
CC
. This is because V+
is internally connected to V
CC
in shutdown mode.
RS-232 Drivers
The typical driver output voltage swing is ±8V when
loaded with a nominal 5k
Ω
RS-232 receiver and V
CC
=
+5V. Output swing is guaranteed to meet the EIA/TIA-
232E and V.28 specification, which calls for ±5V mini-
mum driver output levels under worst-case conditions.
These include a minimum 3k
Ω
load, V
CC
= +4.5V, and
maximum operating temperature. Unloaded driver out-
put voltage ranges from (V+ -1.3V) to (V- +0.5V).
Input thresholds are both TTL and CMOS compatible.
The inputs of unused drivers can be left unconnected
since 400k
Ω
input pull-up resistors to V
CC
are built in.
The pull-up resistors force the outputs of unused drivers
low because all drivers invert. The internal input pull-up
resistors typically source 12µA, except in shutdown
mode where the pull-ups are disabled. Driver outputs
turn off and enter a high-impedance state—where leak-
age current is typically microamperes (maximum
25µA)—when in shutdown mode, in three-state mode, or
when device power is removed. Outputs can be driven
to ±15V. The power-supply current typically drops to
8µA in shutdown mode.
The MAX239 has a receiver three-state control line, and
the MAX223, MAX225, MAX235, MAX236, MAX240,
and MAX241 have both a receiver three-state control
line and a low-power shutdown control. Table 2 shows
the effects of the shutdown control and receiver three-
state control on the receiver outputs.
The receiver TTL/CMOS outputs are in a high-imped-
ance, three-state mode whenever the three-state enable
line is high (for the MAX225/MAX235/MAX236/MAX239–
MAX241), and are also high-impedance whenever the
shutdown control line is high.
When in low-power shutdown mode, the driver outputs
are turned off and their leakage current is less than 1µA
with the driver output pulled to ground. The driver output
leakage remains less than 1µA, even if the transmitter
output is backdriven between 0V and (V
CC
+ 6V). Below
-0.5V, the transmitter is diode clamped to ground with
1k
Ω
series impedance. The transmitter is also zener
clamped to approximately V
CC
+ 6V, with a series
impedance of 1k
Ω
.
The driver output slew rate is limited to less than 30V/µs
as required by the EIA/TIA-232E and V.28 specifica-
tions. Typical slew rates are 24V/µs unloaded and
10V/µs loaded with 3
Ω
and 2500pF.
RS-232 Receivers
EIA/TIA-232E and V.28 specifications define a voltage
level greater than 3V as a logic 0, so all receivers invert.
Input thresholds are set at 0.8V and 2.4V, so receivers
respond to TTL level inputs as well as EIA/TIA-232E and
V.28 levels.
The receiver inputs withstand an input overvoltage up
to ±25V and provide input terminating resistors with
nominal 5k
Ω
values. The receivers implement Type 1
interpretation of the fault conditions of V.28 and
EIA/TIA-232E.
+5V-Powered, Multichannel RS-232
Drivers/Receivers
14
______________________________________________________________________________________
PART
S
SH
HD
DN
N
EN
EN(R)
RECEIVERS
MAX223
__
Low
High
High
X
Low
High
High Impedance
Active
High Impedance
MAX225
__
__
High Impedance
Active
__
MAX235
MAX236
MAX240
Low
Low
High
__
__
Low
High
X
High Impedance
Active
High Impedance
Table 2. Three-State Control of Receivers
Low
High
SHDN
__
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
15
The receiver input hysteresis is typically 0.5V with a
guaranteed minimum of 0.2V. This produces clear out-
put transitions with slow-moving input signals, even
with moderate amounts of noise and ringing. The
receiver propagation delay is typically 600ns and is
independent of input swing direction.
Low-Power Receive Mode
The low-power receive-mode feature of the MAX223,
MAX242, and MAX245–MAX249 puts the IC into shut-
down mode but still allows it to receive information. This
is important for applications where systems are periodi-
cally awakened to look for activity. Using low-power
receive mode, the system can still receive a signal that
will activate it on command and prepare it for communi-
cation at faster data rates. This operation conserves
system power.
Negative Threshold—MAX243
The MAX243 is pin compatible with the MAX232A, differ-
ing only in that RS-232 cable fault protection is removed
on one of the two receiver inputs. This means that control
lines such as CTS and RTS can either be driven or left
floating without interrupting communication. Different
cables are not needed to interface with different pieces of
equipment.
The input threshold of the receiver without cable fault
protection is -0.8V rather than +1.4V. Its output goes
positive only if the input is connected to a control line
that is actively driven negative. If not driven, it defaults
to the 0 or “OK to send” state. Normally‚ the MAX243’s
other receiver (+1.4V threshold) is used for the data line
(TD or RD)‚ while the negative threshold receiver is con-
nected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.).
Other members of the RS-232 family implement the
optional cable fault protection as specified by EIA/TIA-
232E specifications. This means a receiver output goes
high whenever its input is driven negative‚ left floating‚
or shorted to ground. The high output tells the serial
communications IC to stop sending data. To avoid this‚
the control lines must either be driven or connected
with jumpers to an appropriate positive voltage level.
Shutdown—MAX222–MAX242
On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and
MAX241‚ all receivers are disabled during shutdown.
On the MAX223 and MAX242‚ two receivers continue to
operate in a reduced power mode when the chip is in
shutdown. Under these conditions‚ the propagation
delay increases to about 2.5µs for a high-to-low input
transition. When in shutdown, the receiver acts as a
CMOS inverter with no hysteresis. The MAX223 and
MAX242 also have a receiver output enable input (EN
for the MAX242 and EN for the MAX223) that allows
receiver output control independent of SHDN (SHDN
for MAX241). With all other devices‚ SHDN (SHDN for
MAX241) also disables the receiver outputs.
The MAX225 provides five transmitters and five
receivers‚ while the MAX245 provides ten receivers and
eight transmitters. Both devices have separate receiver
and transmitter-enable controls. The charge pumps
turn off and the devices shut down when a logic high is
applied to the ENT input. In this state, the supply cur-
rent drops to less than 25µA and the receivers continue
to operate in a low-power receive mode. Driver outputs
enter a high-impedance state (three-state mode). On
the MAX225‚ all five receivers are controlled by the
ENR input. On the MAX245‚ eight of the receiver out-
puts are controlled by the ENR input‚ while the remain-
ing two receivers (RA5 and RB5) are always active.
RA1–RA4 and RB1–RB4 are put in a three-state mode
when ENR is a logic high.
Receiver and Transmitter Enable
Control Inputs
The MAX225 and MAX245–MAX249 feature transmitter
and receiver enable controls.
The receivers have three modes of operation: full-speed
receive (normal active)‚ three-state (disabled)‚ and low-
power receive (enabled receivers continue to function
at lower data rates). The receiver enable inputs control
the full-speed receive and three-state modes. The
transmitters have two modes of operation: full-speed
transmit (normal active) and three-state (disabled). The
transmitter enable inputs also control the shutdown
mode. The device enters shutdown mode when all
transmitters are disabled. Enabled receivers function in
the low-power receive mode when in shutdown.
MAX220–MAX249
Tables 1a–1d define the control states. The MAX244
has no control pins and is not included in these tables.
The MAX246 has ten receivers and eight drivers with
two control pins, each controlling one side of the
device. A logic high at the A-side control input (ENA)
causes the four A-side receivers and drivers to go into
a three-state mode. Similarly, the B-side control input
(ENB) causes the four B-side drivers and receivers to
go into a three-state mode. As in the MAX245, one A-
side and one B-side receiver (RA5 and RB5) remain
active at all times. The entire device is put into shut-
down mode when both the A and B sides are disabled
(ENA = ENB = +5V).
The MAX247 provides nine receivers and eight drivers
with four control pins. The ENRA and ENRB receiver
enable inputs each control four receiver outputs. The
ENTA and ENTB transmitter enable inputs each control
four drivers. The ninth receiver (RB5) is always active.
The device enters shutdown mode with a logic high on
both ENTA and ENTB.
The MAX248 provides eight receivers and eight drivers
with four control pins. The ENRA and ENRB receiver
enable inputs each control four receiver outputs. The
ENTA and ENTB transmitter enable inputs control four
drivers each. This part does not have an always-active
receiver. The device enters shutdown mode and trans-
mitters go into a three-state mode with a logic high on
both ENTA and ENTB.
The MAX249 provides ten receivers and six drivers with
four control pins. The ENRA and ENRB receiver enable
inputs each control five receiver outputs. The ENTA
and ENTB transmitter enable inputs control three dri-
vers each. There is no always-active receiver. The
device enters shutdown mode and transmitters go into
a three-state mode with a logic high on both ENTA and
ENTB. In shutdown mode, active receivers operate in a
low-power receive mode at data rates up to
20kbits/sec.
__________Applications Information
Figures 5 through 25 show pin configurations and typi-
cal operating circuits. In applications that are sensitive
to power-supply noise, VCC should be decoupled to
ground with a capacitor of the same value as C1 and
C2 connected as close as possible to the device.
+5V-Powered, Multichannel RS-232
Drivers/Receivers
16
______________________________________________________________________________________
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
17
TOP VIEW
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
CC
GND
T1
OUT
R1
IN
C2+
C1-
V+
C1+
MAX220
MAX232
MAX232A
R1
OUT
T1
IN
T2
IN
R2
OUT
R2
IN
T2
OUT
V-
C2-
DIP/SO
V+
V-
2 +10V
C1+
C1
C2
1
3
4
5
11
10
12
9
6
14
7
13
8
T1
IN
R1
OUT
T2
IN
R2
OUT
T1
OUT
R1I
N
T2
OUT
R2
IN
+5V INPUT
C2+
-10V
C4
RS-232
OUTPUTS
RS-232
INPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
GND
15
5k
5k
400k
400k
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
+5V TO +10V
VOLTAGE DOUBLER
16
C3
C5
CAPACITANCE (
µ
F)
DEVICE
MAX220
MAX232
MAX232A
C1
4.7
1.0
0.1
C2
4.7
1.0
0.1
C3
10
1.0
0.1
C4
10
1.0
0.1
C5
4.7
1.0
0.1
C2-
C1-
V
CC
5k
DIP/SO
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
SHDN
V
CC
GND
T1
OUT
C1-
V+
C1+
(N.C.) EN
R1
IN
R1
OUT
T1
IN
T2
IN
T2
OUT
V-
C2-
C2+
10
9
R2
OUT
R2
IN
MAX222
MAX242
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
SHDN
V
CC
GND
T1
OUT
C1-
V+
C1+
(N.C.) EN
N.C.
R1
IN
R1
OUT
N.C.
T2
OUT
V-
C2-
C2+
12
11
9
10
T1
IN
T2
IN
R2
OUT
R2
IN
MAX222
MAX242
SSOP
( ) ARE FOR MAX222 ONLY.
PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY.
V+
V-
3 +10V
C1
C2
2
4
5
6
12
11
13
7
15
8
14
9
T1IN
R1OUT
T2IN
R2OUT
T1OUT
R1IN
T2OUT
R2IN
+5V INPUT
C2+
-10V
C4
RS-232
OUTPUTS
RS-232
INPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
GND
16
5k
400k
400k
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
VCC
+5V TO +10V
VOLTAGE DOUBLER
17
C3
C5
1
10
18
SHDN
EN
(N.C.)
ALL CAPACITORS = 0.1
µ
F
C2-
C1+
C1-
TOP VIEW
Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
18
______________________________________________________________________________________
13
14
28
27
26
25
24
23
22
21
1
2
3
4
5
6
7
8
V
CC
V
CC
V
CC
400k
400k
400k
400k
400k
T
1
OUT
+5V
+5V
0.1
+5V
3
28
27
4
25
24
23
26
5
6
7
22
GND
ENR
ENR
GND
21
+5V
+5V
+5V
T
2
OUT
T
3
OUT
T
4
OUT
5k
5k
5k
5k
5k
14
13
2
1
T
5
OUT
T
5
OUT
R
1
IN
R
2
IN
R
3
IN
R
4
IN
R
5
IN
T
1
IN
11
12
18
17
16
15
10
9
8
19
20
T
2
IN
T
3
IN
T
4
IN
T
5
IN
ENT
R
2
OUT
R
3
OUT
R
4
OUT
PINS (ENR, GND, V
CC
, T
5
OUT) ARE INTERNALLY CONNECTED.
CONNECT EITHER OR BOTH EXTERNALLY. T
5
OUT IS A SINGLE DRIVER.
R
5
OUT
R
1
OUT
V
CC
ENT
T
3
IN
T
2
IN
T
1
IN
ENR
ENR
T
4
IN
T
5
IN
R
4
OUT
R
5
OUT
R
3
IN
R
3
OUT
R
2
OUT
R
1
OUT
20
19
18
17
9
10
11
12
R
5
IN
R
4
IN
T
3
OUT
T
4
OUT
T
2
OUT
T
1
OUT
R
1
IN
R
2
IN
SO
MAX225
16
15
T
5
OUT
MAX225 FUNCTIONAL DESCRIPTION
5 RECEIVERS
5 TRANSMITTERS
2 CONTROL PINS
1 RECEIVER ENABLE (ENR)
1 TRANSMITTER ENABLE (ENT)
T
5
OUT
GND
GND
TOP VIEW
Figure 7. MAX225 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
19
GND
10
27
R3
OUT
23
R4
OUT
R3
IN
R4
IN
5k
5k
5
4
R2
OUT
R2
IN
5k
RS-232
INPUTS
LOGIC
OUTPUTS
RS-232
OUTPUTS
TTL/CMOS
INPUTS
R2
8
9
R1
OUT
R1
IN
5k
R1
R3
R4
19
18
R5
OUT
R5
IN
5k
R5
2
7 T1
IN
T1
OUT
+5V
400k
+5V
6
3
T2
IN
T2
OUT
T2
400k
20
T3
OUT
1
T3
IN
+5V
T3
400k
C1+
C1-
1.0
µ
F
12
V
CC
+5V INPUT
11
17
1.0
µ
F
13
1.0
µ
F
+5V TO +10V
VOLTAGE DOUBLER
26
1.0
µ
F
T1
28
21 T4
IN
T4
OUT
+5V
400k
T4
14
C2+
C2-
15
1.0
µ
F
16
+10V TO -10V
VOLTAGE INVERTER
V+
22
EN (EN)
24
25
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
T4
OUT
R3
IN
R3
OUT
SHDN (SHDN)
R4
IN*
C2+
R4
OUT*
T4
IN
T3
IN
R5
OUT*
R5
IN*
V-
C2-
C1-
V+
C1+
V
CC
GND
R1
IN
R1
OUT
T1
IN
T2
IN
R2
OUT
R2
IN
T2
OUT
T1
OUT
T3
OUT
Wide SO/
SSOP
MAX223
MAX241
EN (EN)
SHDN
(SHDN)
*R4 AND R5 IN MAX223 REMAIN ACTIVE IN SHUTDOWN
NOTE: PIN LABELS IN ( ) ARE FOR MAX241
V-
TOP VIEW
Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
20
______________________________________________________________________________________
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
T5
IN
N.C.
SHDN
T2
IN
T2
OUT
T1
OUT
T5
OUT
T4
IN
T3
IN
V-
C1+
V
CC
GND
T1
IN
12
11
9
10
C2-
C2+
C1-
V+
DIP/SO
MAX230
V+
V-
9
1 T
C1+
C1-
8
10
11
12
5
4
14
13
2
3
1
20
T3
IN
T4
IN
T2
IN
T5
IN
T1
OUT
T2
OUT
+5V INPUT
C2+
C2-
RS-232
OUTPUTS
TTL/CMOS
INPUTS
GND
6
400k
Ω
+5V
400k
Ω
+5V
400k
Ω
+5V
400k
Ω
+5V
400k
Ω
+5V
+10V TO -10V
VOLTAGE INVERTER
VCC
+5V TO +10V
VOLTAGE DOUBLER
7
1.0
µ
F
1.0
µ
F
1.0
µ
F
1.0
µ
F
19
15
16
T3
OUT
T4
OUT
18
x
T1
IN
T3
OUT
T4
OUT
T5
OUT
17
1.0
µ
F
T1
T2
T3
T4
T5
N.C.
SHDN
TOP VIEW
Figure 9. MAX230 Pin Configuration and Typical Operating Circuit
V+
V-
14
C1+
C1-
1
2
8
7
3
11
4
T2
IN
T1
IN
T1
OUT
T2
OUT
+5V INPUT
RS-232
INPUTS
TTL/CMOS
INPUTS
GND
12 (14)
5k
5k
+12V TO -12V
VOLTAGE CONVERTER
13 (15)
1.0
µ
F
1.0
µ
F
C2
1.0
µ
F
400k
Ω
+5V
400k
Ω
+5V
6
9
10
R1
IN
R2
IN
R2
OUT
R1
OUT
5
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V+
V
CC
GND
T1
OUT
T2
OUT
V-
C-
C+
MAX231
R1
IN
R1
OUT
T1
IN
N.C.
N.C.
T2
IN
R2
OUT
R2
IN
SO
(12)
RS-232
OUTPUTS
TTL/CMOS
INPUTS
(11)
(13)
(10)
V
CC
PIN NUMBERS IN ( ) ARE FOR SO PACKAGE
14
13
12
11
10
9
8
1
2
3
4
5
6
7
V+
V
CC
GND
T1
OUT
T2
OUT
V-
C-
C+
MAX231
R1
IN
R1OUT
T1
IN
T2
IN
R2
OUT
R2
IN
DIP
+7.5V TO +12V
(16)
T1
T2
R1
R2
TOP VIEW
Figure 10. MAX231 Pin Configurations and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
21
2
1
5
18
T2
IN
T1
IN
T1
OUT
T2
OUT
+5V INPUT
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
GND
GND
6
9
400k
+5V
400k
+5V
5k
5k
7
20
3
4
R1
IN
R2
IN
R2
OUT
R1
OUT
19
RS-232
OUTPUTS
TTL/CMOS
INPUTS
V
CC
( ) ARE FOR SO PACKAGE ONLY.
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
R2
IN
T2
OUT
V-
R1
IN
R1
OUT
T1
IN
C2-
C2+
V+ (C1-)
C1- (C1+)
(V+) C1+
V
CC
GND
T1
OUT
12
11
9
10
V- (C2+)
C2+ (C2-)
(V-) CS-
GND
DIP/SO
MAX233
MAX233A
T2
IN
R2
OUT
C1+
C1-
V-
V-
V+
C2+
C2-
C2-
C2+
8 (13)
13 (14)
12 (10)
17
14 (8)
11 (12)
15
16
10 (11)
DO NOT MAKE
CONNECTIONS TO
THESE PINS
INTERNAL -10
POWER SUPPLY
INTERNAL +10V
POWER SUPPLY
1.0
µ
F
TOP VIEW
Figure 11. MAX233/MAX233A Pin Configuration and Typical Operating Circuit
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
T3
OUT
T4
OUT
T4
IN
T3
IN
T1
IN
T2
IN
T2
OUT
T1
OUT
MAX234
V-
C2-
C2+
C1-
V+
C1+
V
CC
GND
DIP/SO
V+
V-
8
C1+
C1-
1.0
µ
F
1.0
µ
F
1.0
µ
F
7
9
10
11
4
3
13
14
12
1
3
16
15
T1
IN
T3
IN
T2
IN
T4
IN
T1
OUT
T3
OUT
T2
OUT
T4
OUT
+5V INPUT
C2-
C2+
RS-232
OUTPUTS
TTL/CMOS
INPUTS
GND
5
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
V
CC
+5V TO +10V
VOLTAGE DOUBLER
6
+5V
+5V
400k
400k
400k
400k
1.0
µ
F
1.0
µ
F
T1
T2
T4
T3
TOP VIEW
Figure 12. MAX234 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
22
______________________________________________________________________________________
1.0
µ
F
+5V INPUT
GND
11
6
23
5
R2
OUT
RS-232
INPUTS
TTL/CMOS
OUTPUTS
14
13
21
R5
OUT
5k
17
18
R4
OUT
5k
24
R3
OUT
5k
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
R3
IN
R3
OUT
T5
IN
SHDN
T2
OUT
T1
OUT
T3
OUT
T4
OUT
EN
T5
OUT
R4
IN
R4
OUT
T1
IN
T2
IN
R2
OUT
R2
IN
16
15
14
13
9
10
11
12
T4
IN
T3
IN
R5
OUT
R5
IN
V
CC
GND
R1
IN
R1
OUT
DIP
MAX235
5k
9
10
R1
OUT
R1
IN
R2
IN
R3
IN
R4
IN
R5
IN
5k
7
15
3
4
T2
IN
T3
OUT
RS-232
OUTPUTS
TTL/CMOS
INPUTS
22
19
T5
IN
T5
OUT
+5V
16
1
T4
IN
T4
OUT
+5V
2
T3
IN
+5V
+5V
8 T1
IN
T1
OUT
+5V
T2
OUT
T1
T1
R2
R3
R4
R5
T2
T3
T5
T4
400k
400k
400k
400k
400k
SHDN
EN
20
12
V
CC
TOP VIEW
Figure 13. MAX235 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
23
GND
8
23
R2
OUT
RS-232
INPUTS
TTL/CMOS
OUTPUTS
17
16
21
R3
OUT
R2
IN
R3
IN
5k
5k
5
4
R1
OUT
R1
IN
5k
RS-232
OUTPUTS
TTL/CMOS
INPUTS
R1
R2
R3
2
7 T1
IN
T1
OUT
+5V
T1
400k
6
3
T2
IN
+5V
T2
OUT
T2
400k
18
T3
OUT
1
T3
IN
+5V
T3
400k
19
24
T4
IN
T4
OUT
+5V
T4
400k
SHDN
EN
20
11
C1+
C1-
1.0
µ
F
10
12
13
14
15
+5V INPUT
C2+
C2-
V
CC
+5V TO +10V
VOLTAGE DOUBLER
9
1.0
µ
F
1.0
µ
F
+10V TO -10V
VOLTAGE INVERTER
22
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
T4
OUT
R2
IN
R2
OUT
SHDN
R1
IN
T2
OUT
T1
OUT
T3
OUT
T4
IN
T3
IN
R3
OUT
GND
T1
IN
T2
IN
R1
OUT
16
15
14
13
9
10
11
12
R3
IN
V-
C2-
C2+
C1-
V+
C1+
V
CC
DIP/SO
MAX236
EN
1.0
µ
F
1.0
µ
F
TOP VIEW
V+
V-
Figure 14. MAX236 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
24
______________________________________________________________________________________
GND
8
23
R2
OUT
RS-232
INPUTS
TTL/CMOS
OUTPUTS
17
16
R3
OUT
R2
IN
R3
IN
5k
5k
5
4
R1
OUT
R1
IN
5k
RS-232
OUTPUTS
TTL/CMOS
INPUTS
R1
R2
R3
2
7 T1
IN
T1
OUT
+5V
T1
400k
6
3
T2
IN
+5V
T2
OUT
T2
400k
18
T3
OUT
1
T3
IN
+5V
T3
400k
21
20
T5
IN
T5
OUT
+5V
T5
400k
11
C1+
C1-
1.0
µ
F
10
12
13
14
15
+5V INPUT
C2+
C2-
V
CC
+5V TO +10V
VOLTAGE DOUBLER
9
1.0
µ
F
1.0
µ
F
+10V TO -10V
VOLTAGE INVERTER
22
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
T4
OUT
R2
IN
R2
OUT
T5
IN
R1
IN
T2
OUT
T1
OUT
T3
OUT
T4
IN
T3
IN
R3
OUT
GND
T1
IN
T2
IN
R1
OUT
16
15
14
13
9
10
11
12
R3
IN
V-
C2-
C2+
C1-
V+
C1+
V
CC
DIP/SO
MAX237
T5
OUT
1.0
µ
F
1.0
µ
F
19
24
T4
IN
T4
OUT
+5V
T4
400k
V+
V-
TOP VIEW
Figure 15. MAX237 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
25
GND
8
3
R2
OUT
22
23
R3
OUT
R2
IN
R3
IN
5k
5k
6
7
R1
OUT
R1
IN
5k
RS-232
OUTPUTS
TTL/CMOS
INPUTS
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R1
R2
R3
17
16
R4
OUT
R4
IN
5k
R4
2
5 T1
IN
T1
OUT
+5V
400k
+5V
18
1
T2
IN
T2
OUT
T2
400k
19
T3
OUT
24
T3
IN
+5V
T3
400k
11
C1+
C1-
1.0
µ
F
10
12
13
14
15
+5V INPUT
C2+
C2-
V
CC
+5V TO +10V
VOLTAGE DOUBLER
9
1.0
µ
F
1.0
µ
F
+10V TO -10V
VOLTAGE INVERTER
4
1.0
µ
F
1.0
µ
F
21
20
T4
IN
T4
OUT
+5V
T4
400k
T1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
T3
OUT
R3
IN
R3
OUT
T4
IN
R2
OUT
R2
IN
T1
OUT
T2
OUT
TOP VIEW
T3
IN
T2
IN
R4
OUT
GND
R1
IN
R1
OUT
T1
IN
16
15
14
13
9
10
11
12
R4
IN
V-
C2-
C2+
C1-
V+
C1+
V
CC
DIP/SO
MAX238
T4
OUT
V+
V-
Figure 16. MAX238 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
26
______________________________________________________________________________________
GND
3
18
R3
OUT
12
R4
OUT
R3
IN
R4
IN
5k
5k
22
21
R2
OUT
R2
IN
5k
RS-232
OUTPUTS
TTL/CMOS
INPUTS
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R2
1
2
R1
OUT
R1
IN
5k
R1
R3
R4
10
9
R5
OUT
R5
IN
5k
R5
19
24 T1
IN
T1
OUT
+5V
400k
+5V
23
20
T2
IN
T2
OUT
T2
400k
16
T3
OUT
13
T3
IN
+5V
T3
400k
C1+
C1-
1.0
µ
F
6
V
CC
8
+5V INPUT
4
5
1.0
µ
F
+10V TO -10V
VOLTAGE INVERTER
17
1.0
µ
F
T1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
T1
IN
T2
IN
R2
OUT
R2
IN
V
CC
GND
R1
IN
R1
OUT
T1
OUT
R3
IN
R3
OUT
V-
C-
C+
V+
16
15
14
13
9
10
11
12
T3
IN
N.C.
EN
T3
OUT
R4
IN
R4
OUT
R5
OUT
R5
IN
DIP/SO
MAX239
T2
OUT
7.5V TO 13.2V
INPUT
7
V+
11
EN
14
15
N.C.
V-
TOP VIEW
Figure 17. MAX239 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
27
GND
18
4
R3
OUT
40
R4
OUT
R3
IN
R4
IN
5k
5k
13
10
R2
OUT
R2
IN
5k
RS-232
INPUTS
TTL/CMOS
OUTPUTS
RS-232
OUTPUTS
TTL/CMOS
INPUTS
R2
16
17
R1
OUT
R1
IN
5k
R1
R3
R4
36
35
R5
OUT
R5
IN
5k
R5
7
15 T1
IN
T1
OUT
+5V
400k
+5V
14
8
T2
IN
T2
OUT
T2
400k
37
T3
OUT
6
T3
IN
+5V
T3
400k
C1+
C1-
1.0
µ
F
25
V
CC
+5V INPUT
19
30
1.0
µ
F
26
1.0
µ
F
+5V TO +10V
VOLTAGE DOUBLER
3
1.0
µ
F
T1
+5V
2
41
T5
IN
T5
OUT
T5
400k
5
38 T4
IN
T4
OUT
+5V
400k
T4
27
C2+
C2-
28
1.0
µ
F
29
+5V TO -10V
VOLTAGE INVERTER
V+
39
EN
42
43
Plastic FP
MAX240
SHDN
EN
T5
OUT
R4
IN
R4
OUT
R5
OUT
R5
IN
N.C.
N.C.
T3
IN
T4
IN
R2
OUT
T2
IN
T1
IN
R1
OUT
R1
IN
N.C.
N.C.
N.C.
N.C.
V
CC
GND
R2
IN
N.C.
T4
OUT
T2
OUT
T1
OUT
T3
OUT
N.C.
R3
IN
R3
OUT
N.C.
T5
IN
N.C.
C1+
C2
V+
C1-
C2+
N.C.
V-
N.C.
N.C.
N.C.
33
32
31
30
29
28
27
26
25
24
23
34
35
36
37
38
39
40
41
42
43
44
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
SHDN
TOP VIEW
V-
Figure 18. MAX240 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
28
______________________________________________________________________________________
V+
V-
2
+10V
C1+
C1-
1
3
4
5
11
10
12
9
6
14
7
13
8
T1
IN
R1
OUT
T2
IN
R2
OUT
T1
OUT
R1
IN
T2
OUT
R2
IN
+5V INPUT
C2+
C2-
-10V
RS-232
OUTPUTS
RS-232
INPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
GND
15
5k
5k
400k
400k
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
+5V TO +10V
VOLTAGE DOUBLER
16
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
C1+
V
CC
GND
T1
OUT
R1
IN
R1
OUT
T1
IN
T2
IN
R2
OUT
MAX243
DIP/SO
V+
C1-
V-
C2+
C2-
T2
OUT
R2
IN
0.1
µ
F
0.1
µ
F
0.1
µ
F
0.1
µ
F
ALL CAPACITORS = 0.1
µ
F
0.1
µ
F
RECEIVER INPUT
≤
-3 V
OPEN
≥
+3V
R1 OUTPUT
HIGH
HIGH
LOW
R2 OUTPUT
HIGH
LOW
LOW
TOP VIEW
V
CC
Figure 19. MAX243 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
29
400k
+10V TO -10V VOLTAGE INVERTER
+5V TO +10V VOLTAGE DOUBLER
V
CC
400k
400k
GND
+5V
+5V
+5V
+5V
+5V
25
24
23
21
20
2
1
µ
F
1
µ
F
1
µ
F
1
µ
F
1
µ
F
16
3
17
4
18
5k
5k
5k
5k
5k
5k
5k
5k
5k
5k
C2-
C2+
C1-
C1+
T
A2
OUT
T
A2
IN
T
A3
OUT
T
A3
IN
T
A4
OUT
T
A4
IN
9 R
A1
IN
10 R
A1
OUT
8 R
A2
IN
11 R
A2
OUT
7 R
A3
IN
12 R
A3
OUT
6 R
A4
IN
13 R
A4
OUT
5 R
A5
IN
14
19
R
A5
OUT
26
22
43
29
42
28
41
27
36
35
37
34
38
33
39
32
40
31
V-
V+
T
B2
OUT
T
B2
IN
400k
2
15
T
A1
OUT
T
A1
IN
44
30
T
B1
OUT
T
B1
IN
T
B3
OUT
T
B3
IN
T
B4
OUT
T
B4
IN
R
B1
IN
R
B1
OUT
R
B2
IN
R
B2
OUT
R
B3
IN
R
B3
OUT
R
B4
IN
R
B4
OUT
R
B5
IN
R
B5
OUT
MAX249 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVER
5 B-SIDE RECEIVER
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
NO CONTROL PINS
44
1
2
3
4
40
41
42
43
5
21
24
26
25
27 28
22 23
19 20
8
9
10
11
12
13
14
15
16
17
29
30
31
32
33
34
35
36
37
38
T
A3
IN
V
CC
R
A5
IN
MAX244
PLCC
TOP VIEW
T
A4
OUT
T
A3
OUT
T
A2
OUT
T
A1
OUT
T
B1
OUT
T
B2
OUT
T
B3
OUT
TB
4
OUT
R
B5
IN
GND
V+
C1+
C2+
C1-
V-
C2-
T
B3
IN
T
B4
IN
R
B3
IN
R
B2
IN
R
B1
IN
R
B1
OUT
R
B2
OUT
R
B3
OUT
R
B4
OUT
R
B5
OUT
T
B1
IN
T
B2
IN
T
A2
IN
T
A1
IN
R
A5
OUT
R
A4
OUT
R
A3
OUT
R
A2
OUT
R
A1
OUT
R
A1
IN
R
A2
IN
7
39
R
B4
IN
R
A3
IN
6
18
R
A4
IN
T
A4
IN
+5V
+5V
+5V
+5V
Figure 20. MAX244 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
30
______________________________________________________________________________________
400k
V
CC
400k
400k
GND
+5V
+5V
+5V
+5V
+5V
40
17
1
µ
F
3
18
4
19
5
5k
5k
5k
5k
5k
5k
5k
5k
5k
5k
T
A2
OUT
T
A2
IN
T
A3
OUT
T
A3
IN
T
A4
OUT
T
A4
IN
1
11 R
A1
IN
10 R
A1
OUT
12 R
A2
IN
9 R
A2
OUT
13 R
A3
IN
8 R
A3
OUT
14 R
A4
IN
7 R
A4
OUT
15 R
A5
IN
6
20
R
A5
OUT
23
37
22
36
21
35
29
30
28
31
27
32
26
33
25
34
T
B2
OUT
T
B2
IN
T
B3
OUT
T
B3
IN
T
B4
OUT
T
B4
IN
R
B1
IN
R
B1
OUT
R
B2
IN
R
B2
OUT
R
B3
IN
R
B3
OUT
R
B4
IN
R
B4
OUT
R
B5
IN
R
B5
OUT
+5V
+5V
400k
16
2
T
A1
OUT
T
A1
IN
24
38
T
B1
OUT
T
B1
IN
+5V
+5V
40
V
CC
ENT
T
B1
IN
T
B2
IN
T
B3
IN
T
B4
IN
R
B5
OUT
R
B4
OUT
R
B3
OUT
R
B2
OUT
R
B1
OUT
R
B1
IN
R
B2
IN
R
B3
IN
R
B4
IN
R
B5
IN
T
B1
OUT
T
B2
OUT
T
B3
OUT
T
B4
OUT
39
38
37
36
35
34
33
32
31
1
2
3
4
5
6
7
8
9
10
ENR
T
A1
IN
T
A2
IN
T
A3
IN
T
A4
IN
R
A5
OUT
R
A4
OUT
R
A3
OUT
R
A2
OUT
R
A1
OUT
R
A1
IN
R
A2
IN
R
A3
IN
R
A4
IN
R
A5
IN
T
A1
OUT
T
A2
OUT
T
A3
OUT
T
A4
OUT
GND
TOP VIEW
MAX245
30
29
28
27
26
25
24
23
22
21
11
12
13
14
15
16
17
18
19
DIP
20
MAX245 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTTERS
4 A-SIDE TRANSMITTERS
2 CONTROL PINS
1 RECEIVER ENABLE (ENR)
1 TRANSMITTER ENABLE (ENT)
39
ENR
ENT
Figure 21. MAX245 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
31
400k
V
CC
400k
GND
+5V
+5V
+5V
+5V
+5V
40
16
1
µ
F
2
18
4
T
A1
OUT
T
A1
IN
T
A3
OUT
T
A3
IN
20
24
38
22
36
1
39
T
B1
OUT
T
B1
IN
T
B3
OUT
T
B3
IN
400k
+5V
17
3
T
A2
OUT
T
A2
IN
+5V
23
37
T
B2
OUT
T
B2
IN
400k
+5V
19
5
T
A4
OUT
T
A4
IN
+5V
21
35
T
B4
OUT
T
B4
IN
5k
5k
5k
5k
5k
5k
5k
5k
5k
5k
11 R
A1
IN
10 R
A1
OUT
12 R
A2
IN
9 R
A2
OUT
13 R
A3
IN
8 R
A3
OUT
14 R
A4
IN
7 R
A4
OUT
15 R
A5
IN
6 R
A5
OUT
29
30
28
31
27
32
26
33
25
34
R
B1
IN
R
B1
OUT
R
B2
IN
R
B2
OUT
R
B3
IN
R
B3
OUT
R
B4
IN
R
B4
OUT
R
B5
IN
R
B5
OUT
40
V
CC
ENB
T
B1
IN
T
B2
IN
T
B3
IN
T
B4
IN
R
B5
OUT
R
B4
OUT
R
B3
OUT
R
B2
OUT
R
B1
OUT
R
B1
IN
R
B2
IN
R
B3
IN
R
B4
IN
R
B5
IN
T
B1
OUT
T
B2
OUT
T
B3
OUT
T
B4
OUT
39
38
37
36
35
34
33
32
31
1
2
3
4
5
6
7
8
9
10
ENA
T
A1
IN
T
A2
IN
T
A3
IN
T
A4
IN
R
A5
OUT
R
A4
OUT
R
A3
OUT
R
A2
OUT
R
A1
OUT
R
A1
IN
R
A2
IN
R
A3
IN
R
A4
IN
R
A5
IN
T
A1
OUT
T
A2
OUT
T
A3
OUT
T
A4
OUT
GND
TOP VIEW
MAX246
30
29
28
27
26
25
24
23
22
21
11
12
13
14
15
16
17
18
19
DIP
20
MAX246 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
2 CONTROL PINS
ENABLE A-SIDE (ENA)
ENABLE B-SIDE (ENB)
ENA
ENB
Figure 22. MAX246 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
32
______________________________________________________________________________________
400k
V
CC
400k
GND
+5V
+5V
+5V
+5V
+5V
1
40
16
1
µ
F
2
18
4
5k
5k
5k
5k
5k
5k
5k
5k
ENTA
T
A1
OUT
T
A1
IN
T
A3
OUT
T
A3
IN
6 R
B5
OUT
12 R
A1
IN
10 R
A1
OUT
13 R
A2
IN
9 R
A2
OUT
14 R
A3
IN
8 R
A3
OUT
15 R
A4
IN
7
20
R
A4
OUT
11
39
24
38
22
36
29
31
28
32
27
33
26
34
30
ENRA
ENTB
T
B1
OUT
T
B1
IN
T
B3
OUT
T
B3
IN
R
B1
IN
5k
25
R
B5
IN
R
B1
OUT
R
B2
IN
R
B2
OUT
R
B3
IN
R
B3
OUT
R
B4
IN
R
B4
OUT
ENRB
400k
+5V
17
3
T
A2
OUT
T
A2
IN
+5V
23
37
T
B2
OUT
T
B2
IN
400k
+5V
19
5
T
A4
OUT
T
A4
IN
+5V
21
35
T
B4
OUT
T
B4
IN
40
V
CC
ENTB
T
B1
IN
T
B2
IN
T
B3
IN
T
B4
IN
R
B4
OUT
R
B3
OUT
R
B2
OUT
R
B1
OUT
R
B1
IN
R
B2
IN
R
B3
IN
R
B4
IN
R
B5
IN
T
B1
OUT
T
B2
OUT
T
B3
OUT
T
B4
OUT
39
38
37
36
35
34
33
32
31
1
2
3
4
5
6
7
8
9
10
ENTA
T
A1
IN
T
A2
IN
T
A3
IN
T
A4
IN
R
B5
OUT
R
A4
OUT
R
A3
OUT
R
A2
OUT
R
A1
OUT
R
A1
IN
R
A2
IN
R
A3
IN
R
A4
IN
T
A1
OUT
T
A2
OUT
T
A3
OUT
T
A4
OUT
GND
TOP VIEW
MAX247
30
29
28
27
26
25
24
23
22
21
11
12
13
14
15
16
17
18
19
DIP
20
ENRA
ENRB
MAX247 FUNCTIONAL DESCRIPTION
9 RECEIVERS
4 A-SIDE RECEIVERS
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVERr B-SIDE (ENTB)
Figure 23. MAX247 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
33
400k
+10V TO -10V VOLTAGE INVERTER
+5V TO +10V VOLTAGE DOUBLER
V
CC
400k
GND
+5V
+5V
+5V
+5V
+5V
18
25
24
23
21
20
1
1
µ
F
1
µ
F
1
µ
F
1
µ
F
1
µ
F
14
3
16
5k
5k
5k
5k
5k
5k
5k
5k
ENTA
C2-
C2+
C1-
C1+
T
A1
OUT
T
A1
IN
T
A3
OUT
T
A3
IN
8 R
A1
IN
10 R
A1
OUT
7 R
A2
IN
11 R
A2
OUT
6 R
A3
IN
12 R
A3
OUT
5 R
A4
IN
13
19
R
A4
OUT
9
27
26
22
44
31
42
29
37
35
38
34
39
33
40
32
36
ENRA
ENTB
V-
V+
T
B1
OUT
T
B1
IN
T
B3
OUT
T
B3
IN
R
B1
IN
R
B1
OUT
R
B2
IN
R
B2
OUT
R
B3
IN
R
B3
OUT
R
B4
IN
R
B4
OUT
ENRB
400k
+5V
2
15
T
A2
OUT
T
A2
IN
+5V
43
30
T
B2
OUT
T
B2
IN
400k
+5V
4
17
T
A4
OUT
T
A4
IN
+5V
41
28
T
B4
OUT
T
B4
IN
44
1
2
3
4
40
41
42
43
5
21
24
26
25
27 28
22 23
19 20
8
9
10
11
12
13
14
15
16
17
29
30
31
32
33
34
35
36
37
38
T
A4
IN
V
CC
R
A4
IN
MAX248
PLCC
TOP VIEW
T
A4
OUT
T
A3
OUT
T
A2
OUT
T
A1
OUT
T
B1
OUT
T
B2
OUT
T
B3
OUT
T
A4
OUT
R
B4
IN
GND
V+
C1+
C2+
C1-
V-
C2-
T
B4
IN
ENTB
R
B2
IN
R
B1
IN
R
B1
OUT
R
B2
OUT
R
B3
OUT
R
B4
OUT
T
B1
IN
T
B2
IN
T
B3
IN
T
A3
IN
T
A2
IN
T
A1
IN
R
A4
OUT
R
A3
OUT
R
A2
OUT
R
A1
OUT
ENRA
R
A1
IN
7
39
R
B3
IN
R
A2
IN
6
18
R
A3
IN
ENRB
ENTA
MAX248 FUNCTIONAL DESCRIPTION
8 RECEIVERS
4 A-SIDE RECEIVERS
4 B-SIDE RECEIVERS
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVER B-SIDE (ENTB
)
Figure 24. MAX248 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
34
______________________________________________________________________________________
400k
+10V TO -10V VOLTAGE INVERTER
+5V TO +10V VOLTAGE DOUBLER
V
CC
400k
400k
GND
+5V
+5V
+5V
+5V
+5V
+5V
+5V
18
25
24
23
21
20
1
1
µ
F
1
µ
F
1
µ
F
1
µ
F
15
2
16
3
17
5k
5k
5k
5k
5k
5k
5k
5k
5k
5k
ENTA
C2-
C2+
C1-
C1+
T
A1
OUT
T
A1
IN
T
A2
OUT
T
A2
IN
T
A3
OUT
T
A3
IN
8 R
A1
IN
10 R
A1
OUT
7 R
A2
IN
11 R
A2
OUT
6 R
A3
IN
12 R
A3
OUT
5 R
A4
IN
13 R
A4
OUT
4 R
A5
IN
14
19
R
A5
OUT
9
27
26
22
44
30
43
29
42
28
37
35
38
34
39
33
40
32
41
31
36
ENRA
ENTB
V-
V+
T
B1
OUT
T
B1
IN
T
B2
OUT
T
B2
IN
T
B3
OUT
T
B3
IN
R
B1
IN
R
B1
OUT
R
B2
IN
R
B2
OUT
R
B3
IN
R
B3
OUT
R
B4
IN
R
B4
OUT
R
B5
IN
R
B5
OUT
ENRB
44
1
2
3
4
40
41
42
43
5
21
24
26
25
27 28
22 23
19 20
8
9
10
11
12
13
14
15
16
17
29
30
31
32
33
34
35
36
37
38
V
CC
R
A4
IN
R
A5
IN
MAX249
PLCC
TOP VIEW
T
A3
OUT
T
A2
OUT
T
A1
OUT
T
B1
OUT
T
B2
OUT
T
B3
OUT
R
B4
IN
R
B5
IN
GND
V+
C1+
C2+
C1-
V-
C2-
T
B3
IN
ENTB
R
B2
IN
R
B1
IN
R
B1
OUT
MAX249 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVERS
5 B-SIDE RECEIVERS
6 TRANSMITTERS
3 A-SIDE TRANSMITTERS
3 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVER B-SIDE (ENTB)
R
B2
OUT
R
B3
OUT
R
B4
OUT
R
B5
OUT
T
B1
IN
T
B2
IN
T
A3
IN
T
A2
IN
T
A1
IN
R
A4
OUT
R
A5
OUT
R
A3
OUT
R
A2
OUT
R
A1
OUT
ENRA
R
A1
IN
7
39
R
B3
IN
R
A2
IN
6
18
R
A3
IN
ENRB
ENTA
1
µ
F
Figure 25. MAX249 Pin Configuration and Typical Operating Circuit
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
35
___________________________________________Ordering Information (continued)
PART
MAX222
CPN
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
18 Plastic DIP
MAX222CWN
0°C to +70°C
18 Wide SO
MAX222C/D
0°C to +70°C
Dice*
MAX222EPN
-40°C to +85°C
18 Plastic DIP
MAX222EWN
-40°C to +85°C
18 Wide SO
MAX222EJN
-40°C to +85°C
18 CERDIP
MAX222MJN
-55°C to +125°C
18 CERDIP
MAX223
CAI
0°C to +70°C
28 SSOP
MAX223CWI
0°C to +70°C
28 Wide SO
MAX223C/D
0°C to +70°C
Dice*
MAX223EAI
-40°C to +85°C
28 SSOP
MAX223EWI
-40°C to +85°C
28 Wide SO
MAX225
CWI
0°C to +70°C
28 Wide SO
MAX225EWI
-40°C to +85°C
28 Wide SO
MAX230
CPP
0°C to +70°C
20 Plastic DIP
MAX230CWP
0°C to +70°C
20 Wide SO
MAX230C/D
0°C to +70°C
Dice*
MAX230EPP
-40°C to +85°C
20 Plastic DIP
MAX230EWP
-40°C to +85°C
20 Wide SO
MAX230EJP
-40°C to +85°C
20 CERDIP
MAX230MJP
-55°C to +125°C
20 CERDIP
MAX231
CPD
0°C to +70°C
14 Plastic DIP
MAX231CWE
0°C to +70°C
16 Wide SO
MAX231CJD
0°C to +70°C
14 CERDIP
MAX231C/D
0°C to +70°C
Dice*
MAX231EPD
-40°C to +85°C
14 Plastic DIP
MAX231EWE
-40°C to +85°C
16 Wide SO
MAX231EJD
-40°C to +85°C
14 CERDIP
MAX231MJD
-55°C to +125°C
14 CERDIP
MAX232
CPE
0°C to +70°C
16 Plastic DIP
MAX232CSE
0°C to +70°C
16 Narrow SO
MAX232CWE
0°C to +70°C
16 Wide SO
MAX232C/D
0°C to +70°C
Dice*
MAX232EPE
-40°C to +85°C
16 Plastic DIP
MAX232ESE
-40°C to +85°C
16 Narrow SO
MAX232EWE
-40°C to +85°C
16 Wide SO
MAX232EJE
-40°C to +85°C
16 CERDIP
MAX232MJE
-55°C to +125°C
16 CERDIP
MAX232MLP
-55°C to +125°C
20 LCC
MAX232A
CPE
0°C to +70°C
16 Plastic DIP
MAX232ACSE
0°C to +70°C
16 Narrow SO
MAX232ACWE
0°C to +70°C
16 Wide SO
MAX232AC/D
MAX232AEPE
-40°C to +85°C
16 Plastic DIP
MAX232AESE
0°C to +70°C
Dice*
-40°C to +85°C
16 Narrow SO
MAX232AEWE
-40°C to +85°C
16 Wide SO
MAX232AEJE
-40°C to +85°C
16 CERDIP
MAX232AMJE
-55°C to +125°C
16 CERDIP
MAX232AMLP
-55°C to +125°C
20 LCC
MAX233
CPP
0°C to +70°C
20 Plastic DIP
MAX233EPP
-40°C to +85°C
20 Plastic DIP
MAX233A
CPP
0°C to +70°C
20 Plastic DIP
MAX233ACWP
0°C to +70°C
20 Wide SO
MAX233AEPP
-40°C to +85°C
20 Plastic DIP
MAX233AEWP
-40°C to +85°C
20 Wide SO
MAX234
CPE
0°C to +70°C
16 Plastic DIP
MAX234CWE
0°C to +70°C
16 Wide SO
MAX234C/D
0°C to +70°C
Dice*
MAX234EPE
-40°C to +85°C
16 Plastic DIP
MAX234EWE
-40°C to +85°C
16 Wide SO
MAX234EJE
-40°C to +85°C
16 CERDIP
MAX234MJE
-55°C to +125°C
16 CERDIP
MAX235
CPG
0°C to +70°C
24 Wide Plastic DIP
MAX235EPG
-40°C to +85°C
24 Wide Plastic DIP
MAX235EDG
-40°C to +85°C
24 Ceramic SB
MAX235MDG
-55°C to +125°C
24 Ceramic SB
MAX236
CNG
0°C to +70°C
24 Narrow Plastic DIP
MAX236CWG
0°C to +70°C
24 Wide SO
MAX236C/D
0°C to +70°C
Dice*
MAX236ENG
-40°C to +85°C
24 Narrow Plastic DIP
MAX236EWG
-40°C to +85°C
24 Wide SO
MAX236ERG
-40°C to +85°C
24 Narrow CERDIP
MAX236MRG
-55°C to +125°C
24 Narrow CERDIP
MAX237
CNG
0°C to +70°C
24 Narrow Plastic DIP
MAX237CWG
0°C to +70°C
24 Wide SO
MAX237C/D
0°C to +70°C
Dice*
MAX237ENG
-40°C to +85°C
24 Narrow Plastic DIP
MAX237EWG
-40°C to +85°C
24 Wide SO
MAX237ERG
-40°C to +85°C
24 Narrow CERDIP
MAX237MRG
-55°C to +125°C
24 Narrow CERDIP
MAX238
CNG
0°C to +70°C
24 Narrow Plastic DIP
MAX238CWG
0°C to +70°C
24 Wide SO
MAX238C/D
0°C to +70°C
Dice*
MAX238ENG
-40°C to +85°C
24 Narrow Plastic DIP
* Contact factory for dice specifications.
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
___________________________________________Ordering Information (continued)
* Contact factory for dice specifications.
18 CERDIP
-55°C to +125°C
MAX242MJN
18 CERDIP
-40°C to +85°C
MAX242EJN
18 Wide SO
-40°C to +85°C
MAX242EWN
18 Plastic DIP
-40°C to +85°C
MAX242EPN
Dice*
0°C to +70°C
MAX242C/D
18 Wide SO
0°C to +70°C
MAX242CWN
18 Plastic DIP
0°C to +70°C
MAX242CPN
20 SSOP
0°C to +70°C
MAX242
CAP
28 Wide SO
-40°C to +85°C
MAX241EWI
28 SSOP
-40°C to +85°C
MAX241EAI
Dice*
0°C to +70°C
MAX241C/D
28 Wide SO
0°C to +70°C
MAX241CWI
28 SSOP
0°C to +70°C
MAX241
CAI
Dice*
0°C to +70°C
MAX240C/D
44 Plastic FP
0°C to +70°C
MAX240
CMH
24 Narrow CERDIP
-55°C to +125°C
MAX239MRG
24 Narrow CERDIP
-40°C to +85°C
MAX239ERG
24 Wide SO
-40°C to +85°C
MAX239EWG
24 Narrow Plastic DIP
-40°C to +85°C
MAX239ENG
Dice*
0°C to +70°C
MAX239C/D
24 Wide SO
0°C to +70°C
MAX239CWG
24 Narrow Plastic DIP
0°C to +70°C
MAX239
CNG
24 Narrow CERDIP
-55°C to +125°C
24 Wide SO
PIN-PACKAGE
TEMP. RANGE
-40°C to +85°C
MAX238MRG
24 Narrow CERDIP
-40°C to +85°C
MAX238ERG
MAX238EWG
PART
44 PLCC
-40°C to +85°C
MAX249EQH
44 PLCC
0°C to +70°C
MAX249
CQH
44 PLCC
-40°C to +85°C
MAX248EQH
Dice*
0°C to +70°C
MAX248C/D
44 PLCC
0°C to +70°C
MAX248
CQH
40 Plastic DIP
-40°C to +85°C
MAX247EPL
Dice*
0°C to +70°C
MAX247C/D
40 Plastic DIP
0°C to +70°C
MAX247
CPL
40 Plastic DIP
-40°C to +85°C
MAX246EPL
Dice*
0°C to +70°C
MAX246C/D
40 Plastic DIP
0°C to +70°C
MAX246
CPL
40 Plastic DIP
-40°C to +85°C
MAX245EPL
Dice*
0°C to +70°C
MAX245C/D
40 Plastic DIP
0°C to +70°C
MAX245
CPL
44 PLCC
-40°C to +85°C
MAX244EQH
Dice*
0°C to +70°C
MAX244C/D
44 PLCC
0°C to +70°C
MAX244
CQH
16 CERDIP
-55°C to +125°C
MAX243MJE
16 CERDIP
-40°C to +85°C
MAX243EJE
16 Wide SO
-40°C to +85°C
MAX243EWE
16 Narrow SO
-40°C to +85°C
MAX243ESE
16 Plastic DIP
-40°C to +85°C
MAX243EPE
Dice*
0°C to +70°C
MAX243C/D
16 Wide SO
0°C to +70°C
16 Plastic DIP
0°C to +70°C
MAX243CWE
16 Narrow SO
0°C to +70°C
MAX243CSE
MAX243
CPE
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
36
__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.