MC74LCX244REV3 Datasheet

/var/www/html/datasheet/sites/default/files/pdfhtml_images/mc74lcx244rev3-html.html
background image

Order this document

by MC74LCX244/D

SEMICONDUCTOR TECHNICAL DATA

1

REV 3

 Motorola, Inc. 1995

9/95

#*#!'     '!

(%

'   #!%"'  "$('&  "  ('$('&

''  #"")%' "

The MC74LCX244 is a high performance, non–inverting octal buffer

operating from a 2.7 to 3.6V supply. High impedance TTL compatible
inputs significantly reduce current loading to input drivers while TTL
compatible outputs offer improved switching noise performance. A VI
specification of 5.5V allows MC74LCX244 inputs to be safely driven from
5V devices. The MC74LCX244 is suitable for memory address driving
and all TTL level bus oriented transceiver applications.

Current drive capability is 24mA at the outputs. The Output Enable

(OE) input, when HIGH, disables the output by placing them in a HIGH Z
condition.

Designed for 2.7 to 3.6V VCC Operation

5V Tolerant — Interface Capability With 5V TTL Logic

Supports Live Insertion and Withdrawal

IOFF Specification Guarantees High Impedance When VCC = 0V

LVTTL Compatible

LVCMOS Compatible

24mA Balanced Output Sink and Source Capability

Near Zero Static Supply Current in All Three Logic States (10

µ

A)

Substantially Reduces System Power Requirements

Latchup Performance Exceeds 500mA

ESD Performance: Human Body Model >2000V; Machine Model >200V

Pinout: 20–Lead (Top View)

19

20

18

17

16

15

14

2

1

3

4

5

6

7

VCC

13

8

12

9

11

10

2OE

1O0

2D0

1O1

2D1

1O2

2D2

1O3

2D3

1OE

1D0

2O0

1D1

2O1

1D2

2O2

1D3

2O3

GND

DW SUFFIX

PLASTIC SOIC

CASE 751D–04

DT SUFFIX

PLASTIC TSSOP

CASE 948E–02

20

1

20

1

M SUFFIX

PLASTIC SOIC EIAJ

CASE 967–01

20

1

SD SUFFIX

PLASTIC SSOP

CASE 940C–03

20

1

PIN NAMES

Function

Output Enable Inputs
Data Inputs
3–State Outputs

Pins

nOE
1Dn, 2Dn
1On, 2On

LOW–VOLTAGE CMOS

OCTAL BUFFER

/var/www/html/datasheet/sites/default/files/pdfhtml_images/mc74lcx244rev3-html.html
background image

MC74LCX244

MOTOROLA

LCX  DATA

BR1339 — REV 2

2

LOGIC DIAGRAM

1OE

1

1D0

2

1O0

18

1D1

4

1O1

16

1D2

6

1O2

14

1D3

8

1O3

12

2OE

19

2D0

17

2O0

3

2D1

15

2O1

5

2D2

13

2O2

7

2D3

11

2O3

9

INPUTS

OUTPUTS

1OE
2OE

1Dn
2Dn

1On, 2On

L

L

L

L

H

H

H

X

Z

H = High Voltage Level; L = Low Voltage Level; Z = High
Impedance State; X = High or Low Voltage Level and Transitions
Are Acceptable, for ICC reasons, DO NOT FLOAT Inputs

/var/www/html/datasheet/sites/default/files/pdfhtml_images/mc74lcx244rev3-html.html
background image

MC74LCX244

LCX DATA
BR1339 — REV 2

3

MOTOROLA

ABSOLUTE MAXIMUM RATINGS*

Symbol

Parameter

Value

Condition

Unit

VCC

DC Supply Voltage

–0.5 to +7.0

V

VI

DC Input Voltage

–0.5 

 VI 

 +7.0

V

VO

DC Output Voltage

–0.5 

 VO 

 +7.0

Output in 3–State

V

–0.5 

 VO 

 VCC + 0.51

Output in HIGH or LOW State

V

IIK

DC Input Diode Current

–50

VI < GND

mA

IOK

DC Output Diode Current

–50

VO < GND

mA

+50

VO > VCC

mA

IO

DC Output Source/Sink Current

±

50

mA

ICC

DC Supply Current Per Supply Pin

±

100

mA

IGND

DC Ground Current Per Ground Pin

±

100

mA

TSTG

Storage Temperature Range

–65 to +150

°

C

* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions

beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is not implied.

1. IO absolute maximum rating must be observed.

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Min

Typ

Max

Unit

VCC

Supply Voltage

Operating

Data Retention Only

2.0
1.5

3.3
3.3

3.6
3.6

V

VI

Input Voltage

0

5.5

V

VO

Output Voltage

(HIGH or LOW State)

(3–State)

0
0

VCC

5.5

V

IOH

HIGH Level Output Current, VCC = 3.0V – 3.6V

–24

mA

IOL

LOW Level Output Current, VCC = 3.0V – 3.6V

24

mA

IOH

HIGH Level Output Current, VCC = 2.7V – 3.0V

–12

mA

IOL

LOW Level Output Current, VCC = 2.7V – 3.0V

12

mA

TA

Operating Free–Air Temperature

–40

+85

°

C

t/

V

Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V,
 VCC = 3.0V

0

10

ns/V

DC ELECTRICAL CHARACTERISTICS

TA = –40

°

C to +85

°

C

Symbol

Characteristic

Condition

Min

Max

Unit

VIH

HIGH Level Input Voltage (Note 1)

2.7V 

 VCC 

 3.6V

2.0

V

VIL

LOW Level Input Voltage (Note 1)

2.7V 

 VCC 

 3.6V

0.8

V

VOH

HIGH Level Output Voltage

2.7V 

 VCC 

 3.6V; IOH = –100

µ

A

VCC – 0.2

V

VCC = 2.7V; IOH = –12mA

2.2

VCC = 3.0V; IOH = –18mA

2.4

VCC = 3.0V; IOH = –24mA

2.2

VOL

LOW Level Output Voltage

2.7V 

 VCC 

 3.6V; IOL = 100

µ

A

0.2

V

VCC = 2.7V; IOL= 12mA

0.4

VCC = 3.0V; IOL = 16mA

0.4

VCC = 3.0V; IOL = 24mA

0.55

1. These values of VI are used to test DC electrical characteristics only. Functional test should use VIH 

 2.4V, VIL 

 0.5V.

/var/www/html/datasheet/sites/default/files/pdfhtml_images/mc74lcx244rev3-html.html
background image

MC74LCX244

MOTOROLA

LCX  DATA

BR1339 — REV 2

4

DC ELECTRICAL CHARACTERISTICS 

(continued)

TA = –40

°

C to +85

°

C

Symbol

Characteristic

Condition

Min

Max

Unit

II

Input Leakage Current

2.7V 

 VCC 

 3.6V; 0V 

 VI 

 5.5V

±

5.0

µ

A

IOZ

3–State Output Current

2.7 

 VCC 

 3.6V; 0V 

 VO 

 5.5V; 

VI = VIH or V IL

±

5.0

µ

A

IOFF

Power–Off Leakage Current

VCC = 0V; VI or VO = 5.5V

10

µ

A

ICC

Quiescent Supply Current

2.7 

 VCC 

 3.6V; VI = GND or VCC

10

µ

A

CC

2.7 

 VCC 

 3.6V; 3.6 

 VI or VO 

 5.5V

±

10

µ

A

ICC

Increase in ICC per Input

2.7 

 VCC 

 3.6V; VIH = VCC – 0.6V

500

µ

A

AC CHARACTERISTICS (tR = tF = 2.5ns; CL = 50pF; RL = 500

)

Limits

TA = –40

°

C to +85

°

C

VCC = 3.0V to 3.6V

VCC = 2.7V

Symbol

Parameter

Waveform

Min

Max

Max

 Unit

tPLH
tPHL

Propagation Delay
Input to Output

1

1.5
1.5

6.5
6.5

7.5
7.5

ns

tPZH
tPZL

Output Enable Time to
High and Low Level

2

1.5
1.5

8.0
8.0

9.0
9.0

ns

tPHZ
tPLZ

Output Disable Time From
High and Low Level

2

1.5
1.5

7.0
7.0

8.0
8.0

ns

tOSHL
tOSLH

Output–to–Output Skew 
(Note 1)

1.0
1.0

ns

1. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.

The specification applies to any outputs switching in the same direction, either HIGH–to–LOW (tOSHL) or LOW–to–HIGH (tOSLH); parameter

guaranteed by design.

DYNAMIC SWITCHING CHARACTERISTICS

TA = +25

°

C

Symbol

Characteristic

Condition

Min

Typ

Max

Unit

VOLP

Dynamic LOW Peak Voltage1

VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V

0.8

V

VOLV

Dynamic LOW Valley Voltage1

VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V

0.8

V

1. Number of outputs defined as “n”. Measured with “n–1” outputs switching from HIGH–to–LOW or LOW–to–HIGH. The remaining output is

measured in the LOW state.

CAPACITIVE CHARACTERISTICS

Symbol

Parameter

Condition

Typical

Unit

CPD

Power Dissipation Capacitance

10MHz, VCC = 3.3V, VI = 0V or VCC

25

pF

CIN

Input Capacitance

VCC = 3.3V, VI = 0V or VCC

7

pF

COUT

Output Capacitance

VCC = 3.3V, VI = 0V or VCC

8

pF

/var/www/html/datasheet/sites/default/files/pdfhtml_images/mc74lcx244rev3-html.html
background image

MC74LCX244

LCX DATA
BR1339 — REV 2

5

MOTOROLA

WAVEFORM 1 – PROPAGATION DELAYS

tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns

2.7V

0V

VOH

VOL

1Dn, 2Dn

1On, 2On

tPHL

tPLH

WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES

tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns

2.7V

0V

 0V

1OE, 2OE

1On, 2On

tPZH

 3.0V

tPHZ

tPZL

tPLZ

1On, 2On

1.5V

1.5V

1.5V

1.5V

1.5V

1.5V

Figure 1. AC Waveforms

1.5V

VCC
VOH – 0.3V

VOL + 0.3V
GND

OPEN

PULSE

GENERATOR

RT

DUT

VCC

RL

R1

CL

6V

GND

TEST

SWITCH

tPLH, tPHL

Open

tPZL, tPLZ

6V

Open Collector/Drain tPLH and tPHL

6V

tPZH, tPHZ

GND

CL = 50pF or equivalent (Includes jig and probe capacitance)

RL = R1 = 500

 or equivalent

RT = ZOUT of pulse generator (typically 50

)

Figure 2. Test Circuit

/var/www/html/datasheet/sites/default/files/pdfhtml_images/mc74lcx244rev3-html.html
background image

MC74LCX244

MOTOROLA

LCX  DATA

BR1339 — REV 2

6

OUTLINE DIMENSIONS

DW SUFFIX

PLASTIC SOIC PACKAGE

CASE 751D–04

ISSUE E

M SUFFIX

PLASTIC SOIC EIAJ PACKAGE

CASE 967–01

ISSUE O

MIN

MIN

MAX

MAX

MILLIMETERS

INCHES

DIM

A
B
C
D

F

G

J

K

M

P
R

0.510
0.299
0.104
0.019
0.035

0.012
0.009

7

°

  

0.415
0.029

0.499
0.292
0.093
0.014
0.020

0.010
0.004

0

°

  

0.395
0.010

12.95

7.60
2.65
0.49
0.90

0.32
0.25

7

°

 

10.55

0.75

12.65

7.40
2.35
0.35
0.50

0.25
0.10

0

°

 

10.05

0.25

NOTES:

1. DIMENSIONING AND TOLERANCING PER

ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE

MOLD PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.150

(0.006) PER SIDE.

5. DIMENSION D DOES NOT INCLUDE

DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D DIMENSION
AT MAXIMUM MATERIAL CONDITION.

1.27 BSC

0.050 BSC

–A

–B

10 PL

1

10

11

20

–T

D

 

20 PL

K

C

SEATING
PLANE

X 45

°

M

0.010 (0.25)

B

M

M

0.010 (0.25)

T

A

B

M

S

S

G

 

18 PL

F

J

DIM

MIN

MAX

MIN

MAX

INCHES

--- 

2.05

--- 

0.081

MILLIMETERS

0.05

0.20

0.002

0.008

0.35

0.50

0.014

0.020

0.18

0.27

0.007

0.011

12.35

12.80

0.486

0.504

5.10

5.45

0.201

0.215

1.27 BSC

0.050 BSC

7.40

8.20

0.291

0.323

0.50

0.85

0.020

0.033

1.10

1.50

0.043

0.059

0   

0.70

0.90

0.028

0.035

--- 

0.81

--- 

0.032

A1

A

b
c

D
E

e

L

M

Z

HE

Q1

LE

_

10 

_

0   

_

10 

_

NOTES:

1 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2 CONTROLLING DIMENSION: MILLIMETER.
3 DIMENSIONS D AND E DO NOT INCLUDE MOLD

FLASH OR PROTRUSIONS AND ARE MEASURED
AT THE PARTING LINE. MOLD FLASH OR
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.

4 TERMINAL NUMBERS ARE SHOWN FOR

REFERENCE ONLY.

5 THE LEAD WIDTH DIMENSION (b) DOES NOT

INCLUDE DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE  LOWER
RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSIONS AND ADJACENT LEAD
TO BE 0.46 ( 0.018).

Z

D

HE

E

1

20

11

10

b

A1

e

L

LE

Q1

M

_

VIEW P

DETAIL P

0.13 (0.005)

M

0.10 (0.004)

c

A

/var/www/html/datasheet/sites/default/files/pdfhtml_images/mc74lcx244rev3-html.html
background image

MC74LCX244

LCX DATA
BR1339 — REV 2

7

MOTOROLA

OUTLINE DIMENSIONS

SD SUFFIX

PLASTIC SSOP PACKAGE

CASE 940C–03

ISSUE B

DT SUFFIX

PLASTIC TSSOP PACKAGE

CASE 948E–02

ISSUE A

DIM

A

MIN

MAX

MIN

MAX

INCHES

6.60

0.260

MILLIMETERS

B

4.30

4.50

0.169

0.177

C

1.20

0.047

D

0.05

0.15

0.002

0.006

F

0.50

0.75

0.020

0.030

G

0.65 BSC

0.026 BSC

H

0.27

0.37

0.011

0.015

J

0.09

0.20

0.004

0.008

J1

0.09

0.16

0.004

0.006

K

0.19

0.30

0.007

0.012

K1

0.19

0.25

0.007

0.010

L

6.40 BSC

0.252 BSC

M

_

_

_

_

NOTES:

6 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

7 CONTROLLING DIMENSION: MILLIMETER.
8 DIMENSION A DOES NOT INCLUDE MOLD FLASH,

PROTRUSIONS OR GATE BURRS.  MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.

9 DIMENSION B DOES NOT INCLUDE INTERLEAD

FLASH OR PROTRUSION.  INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.25 (0.010)
PER SIDE.

10 DIMENSION K DOES NOT INCLUDE DAMBAR

PROTRUSION.  ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.

11 TERMINAL NUMBERS ARE SHOWN FOR

REFERENCE ONLY.

12 DIMENSION A AND B ARE TO BE DETERMINED

AT DATUM PLANE –W–.

ÍÍÍÍ

ÍÍÍÍ

ÍÍÍÍ

ÍÍÍÍ

ÍÍÍÍ

1

10

11

20

PIN 1
IDENT

A

B

–T–

0.100 (0.004)

C

D

G

H

SECTION N–N

K

K1

J J1

N

N

M

F

–W–

SEATING
PLANE

–V–

–U–

S

U

M

0.10 (0.004)

V

S

T

20X      REF

K

L

L/2

2X

S

U

0.15 (0.006) T

DETAIL E

0.25 (0.010)

DETAIL E

6.40

0.252

–––

–––

S

U

0.15 (0.006) T

20

11

10

1

H

A

B

F

M

K

20X        REF

S

U

M

0.12 (0.005)

V

S

T

L

L/2

PIN 1
IDENT

S

U

M

0.20 (0.008)

T

–V–

–U–

D

C

0.076 (0.003)

G

–T–

SEATING
PLANE

DETAIL E

N

N

0.25 (0.010)

ÇÇÇ

ÇÇÇ

ÇÇÇ

ÇÇÇ

ÉÉÉ

ÉÉÉ

ÉÉÉ

ÉÉÉ

K

J

J1

K1

SECTION N–N

DIM

A

MIN

MAX

MIN

MAX

INCHES

7.07

7.33

0.278

0.288

MILLIMETERS

B

5.20

5.38

0.205

0.212

C

1.73

1.99

0.068

0.078

D

0.05

0.21

0.002

0.008

F

0.63

0.95

0.024

0.037

G

0.65 BSC

0.026 BSC

H

0.59

0.75

0.023

0.030

J

0.09

0.20

0.003

0.008

J1

0.09

0.16

0.003

0.006

K

0.25

0.38

0.010

0.015

K1

0.25

0.33

0.010

0.013

_

_

_

_

NOTES:

13 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

14 CONTROLLING DIMENSION: MILLIMETER.
15 DIMENSION A DOES NOT INCLUDE MOLD FLASH,

PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.

16 DIMENSION B DOES NOT INCLUDE INTERLEAD

FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.

17 DIMENSION K DOES NOT INCLUDE DAMBAR

PROTRUSION/INTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN
EXCESS OF K DIMENSION AT MAXIMUM
MATERIAL CONDITION. DAMBAR INTRUSION
SHALL NOT REDUCE DIMENSION K BY MORE
THAN 0.07 (0.002) AT LEAST MATERIAL
CONDITION.

18 TERMINAL NUMBERS ARE SHOWN FOR

REFERENCE ONLY.

19 DIMENSION A AND B ARE TO BE DETERMINED

AT DATUM PLANE –W–.

L

7.65

7.90

0.301

0.311

M

0  

8  

0  

8  

DETAIL E

–W–

/var/www/html/datasheet/sites/default/files/pdfhtml_images/mc74lcx244rev3-html.html
background image

MC74LCX244

MOTOROLA

LCX  DATA

BR1339 — REV 2

8

How to reach us:
USA/EUROPE
: Motorola Literature Distribution; 

JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki,

P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447

 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan.  03–3521–8315

MFAX: RMFAX0@email.sps.mot.com –TOUCHTONE (602) 244–6609

HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 

INTERNET: http://Design–NET.com

51 Ting Kok Road, Tai Po, N.T., Hong Kong.  852–26629298

Motorola reserves the right to make changes without further notice to any products herein.  Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages.  “Typical” parameters can and do vary in different
applications.  All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts.  Motorola does
not convey any license under its patent rights nor the rights of others.  Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of
the Motorola product could create a situation where personal injury or death may occur.  Should Buyer purchase or use Motorola products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless
against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
Motorola and   

   are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.

MC74LCX244/D

*MC74LCX244/D*

CODELINE

Maker
Motorola
Datasheet PDF Download