PIC16F526 14-Pin, 8-Bit Flash MCU Data Sheet

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 2010 Microchip Technology Inc.

DS41326E

PIC16F526

Data Sheet

14-Pin, 8-Bit Flash Microcontroller

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DS41326E-page 2

 2010 Microchip Technology Inc.

Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
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OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE.  Microchip disclaims all liability
arising from this information and its use. Use of Microchip
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Trademarks

The Microchip name and logo, the Microchip logo, dsPIC, 
K

EE

L

OQ

, K

EE

L

OQ

 logo, MPLAB, PIC, PICmicro, PICSTART, 

PIC

32

 logo, rfPIC and UNI/O are registered trademarks of 

Microchip Technology Incorporated in the U.S.A. and other 
countries.

FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, 
MXDEV, MXLAB, SEEVAL and The Embedded Control 
Solutions Company are registered trademarks of Microchip 
Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard, 
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, 
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial 
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified 
logo, MPLIB, MPLINK, mTouch, Octopus, Omniscient Code 
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, 
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, 
TSHARC, UniWinDriver, WiperLock and ZENA are 
trademarks of Microchip Technology Incorporated in the 
U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated 
in the U.S.A.

All other trademarks mentioned herein are property of their 
respective companies.

© 2010, Microchip Technology Incorporated, Printed in the 
U.S.A., All Rights Reserved.

 Printed on recycled paper.

ISBN: 978-1-60932-355-4

Note the following details of the code protection feature on Microchip devices:

Microchip products meet the specification contained in their particular Microchip Data Sheet.

Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the 
intended manner and under normal conditions.

There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our 
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data 
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

Microchip is willing to work with the customer who is concerned about the integrity of their code.

Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not 
mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
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Microchip received ISO/TS-16949:2002 certification for its worldwide 

headquarters, design and wafer fabrication facilities in Chandler and 

Tempe, Arizona; Gresham, Oregon and design centers in California 

and India. The Company’s quality system processes and procedures 

are for its PIC

®

 

MCUs and dsPIC

®

 DSCs, K

EE

L

OQ

®

 

code hopping 

devices, Serial EEPROMs, microperipherals, nonvolatile memory and 

analog products. In addition, Microchip’s quality system for the design 

and manufacture of development systems is ISO 9001:2000 certified.

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 2010 Microchip Technology Inc.

DS41326E-page 3

PIC16F526

High-Performance RISC CPU: 

• Only 33 Single-Word Instructions
• All Single-Cycle Instructions except for Program 

Branches which are Two-Cycle

• Two-Level Deep Hardware Stack
• Direct, Indirect and Relative Addressing modes 

for Data and Instructions

• Operating Speed: 

- DC – 20 MHz crystal oscillator
- DC – 200 ns instruction cycle

• On-chip Flash Program Memory:

- 1024 x 12

• General Purpose Registers (SRAM):

- 67  x  8

• Flash Data Memory:

- 64  x  8

Special Microcontroller Features:

• 8 MHz Precision Internal Oscillator:

- Factory calibrated to ±1%

• In-Circuit Serial Programming™ (ICSP™)
• In-Circuit Debugging (ICD) Support
• Power-On Reset (POR)
• Device Reset Timer (DRT)
• Watchdog Timer (WDT) with Dedicated On-Chip 

RC Oscillator for Reliable Operation

• Programmable Code Protection
• Multiplexed MCLR Input Pin
• Internal Weak Pull-ups on I/O Pins
• Power-Saving Sleep mode
• Wake-Up from Sleep on Pin Change
• Selectable Oscillator Options:

- INTRC: 4 MHz or 8 MHz precision Internal 

RC oscillator

- EXTRC: External low-cost RC oscillator
- XT:

Standard crystal/resonator

- HS:

High-speed crystal/resonator

- LP:

Power-saving, low-frequency crystal

- EC:

High-speed external clock input

Low-Power Features/CMOS Technology: 

• Standby current:

- 100 nA @ 2.0V, typical

• Operating current:

- 11

A @ 32 kHz, 2.0V, typical

- 175

A @ 4 MHz, 2.0V, typical

• Watchdog Timer current:

- 1

A @ 2.0V, typical

- 7

A @ 5.0V, typical

• High Endurance Program and Flash Data Memory 

cells:
- 100,000 write Program Memory endurance

- 1,000,000 write Flash Data Memory endurance

- Program and Flash Data retention: >40 years 

• Fully Static Design
• Wide Operating Voltage Range: 2.0V to 5.5V:

- Wide temperature range 
- Industrial: -40

C to +85C

- Extended: -40

C to +125C

Peripheral Features:

• 12 I/O Pins:

- 11 I/O pins with individual direction control
- 1 input-only pin
- High current sink/source for direct LED drive
- Wake-up on change
- Weak pull-ups

• 8-bit Real-time Clock/Counter (TMR0) with 8-bit 

Programmable Prescaler

• Two Analog Comparators:

- Comparator inputs and output accessible 

externally

- One comparator with 0.6V fixed on-chip 

absolute voltage reference (V

REF

)

- One comparator with programmable on-chip 

voltage reference (V

REF

)

• Analog-to-Digital (A/D) Converter:

- 8-bit resolution
- 3-channel external programmable inputs
- 1-channel internal input to internal absolute 

0.6 voltage reference

Device

Program 

Memory

Data Memory

I/O

Comparators

Timers 8-bit

8-bit A/D

Channels

Flash (words) SRAM (bytes)

Flash 

(bytes)

PIC16F526

1024

67

64

12

2

1

3

14-Pin, 8-Bit Flash Microcontroller

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PIC16F526

DS41326E-page 4

 2010 Microchip Technology Inc.

FIGURE 1-1:

14-PIN PDIP, SOIC, TSSOP DIAGRAM

FIGURE 1-2:

16-PIN QFN DIAGRAM

V

DD

RB5/OSC1/CLKIN

RB4/OSC2/CLKOUT

RB3/MCLR/V

PP

RC5/T0CKI

RC4/C2OUT

RC3

V

SS

RB0/C1IN+/AN0/ICSPDAT
RB1/C1IN-/AN1/ICSPCLK
RB2/C1OUT/AN2
RC0/C2IN+
RC1/C2IN-
RC2/CV

REF

P

IC1

6F

526

1
2
3
4
5
6
7

8

9

10

11

12

13

14

PI

C16F

526

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

V

DD

NC

NC

GND

RC5/T0CKI

RB4/OSC2/CLKOUT

RB3/MCLR/V

PP

RB5/OSC1/CLKIN

RB0/C1IN+/AN0/ICSPDAT

RB1/C1IN-/AN1/ICSPCLK

RB2/C1OUT/AN2

RC0/C2IN+

RC4

/C2

O

UT

RC3

RC2

/C

V

RE

F

RC1

/C2

IN-

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 2010 Microchip Technology Inc.

DS41326E-page 5

PIC16F526

Table of Contents

1.0

General Description.....................................................................................................................................................................  7

2.0

PIC16F526 Device Varieties ......................................................................................................................................................   9

3.0

Architectural Overview ..............................................................................................................................................................  11

4.0

Memory Organization ................................................................................................................................................................  15

5.0

Flash Data Memory Control ......................................................................................................................................................  23

6.0

I/O Port ......................................................................................................................................................................................  27

7.0

Timer0 Module and TMR0 Register ..........................................................................................................................................  37

8.0

Special Features of the CPU.....................................................................................................................................................  43

9.0

Analog-to-Digital (A/D) Converter..............................................................................................................................................  59

10.0 Comparator(s) ...........................................................................................................................................................................  63
11.0 Comparator Voltage Reference Module....................................................................................................................................  69
12.0 Instruction Set Summary ...........................................................................................................................................................  71
13.0 Development Support................................................................................................................................................................  79
14.0 Electrical Characteristics ...........................................................................................................................................................  83
15.0 DC and AC Characteristics Graphs and Charts ........................................................................................................................  97
16.0 Packaging Information.............................................................................................................................................................  107
The Microchip Web Site....................................................................................................................................................................  115
Customer Change Notification Service .............................................................................................................................................  115
Customer Support.............................................................................................................................................................................  115
Reader Response .............................................................................................................................................................................  116
Index .................................................................................................................................................................................................. 117
Product Identification System................ ...........................................................................................................................................  119

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PIC16F526

DS41326E-page 6

 2010 Microchip Technology Inc.

NOTES:

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 2010 Microchip Technology Inc.

DS41326E-page 7

PIC16F526

1.0

GENERAL DESCRIPTION

The PIC16F526 device from Microchip Technology is
low-cost, high-performance, 8-bit, fully-static, Flash-
based CMOS microcontrollers. It employs a RISC
architecture with only 33 single-word/single-cycle
instructions. All instructions are single cycle (200

s)

except for program branches, which take two cycles.
The PIC16F526 device delivers performance an order
of magnitude higher than their competitors in the same
price category. The 12-bit wide instructions are highly
symmetrical, resulting in a typical 2:1 code
compression over other 8-bit microcontrollers in its
class. The easy-to-use and easy to remember
instruction set reduces development time significantly.
The PIC16F526 product is equipped with special
features that reduce system cost and power
requirements. The Power-on Reset (POR) and Device
Reset Timer (DRT) eliminate the need for external
Reset circuitry. There are four oscillator configurations
to choose from, including INTRC Internal Oscillator
mode and the power-saving LP (Low-Power) Oscillator
mode. Power-Saving Sleep mode, Watchdog Timer
and code protection features improve system cost,
power and reliability.
The PIC16F526 device is available in the cost-effective
Flash programmable version, which is suitable for
production in any volume. The customer can take full
advantage of Microchip’s price leadership in Flash
programmable microcontrollers, while benefiting from
the Flash programmable flexibility.
The PIC16F526 product is supported by a full-featured
macro assembler, a software simulator, an in-circuit
emulator, a ‘C’ compiler, a low-cost development
programmer and a full featured programmer. All the
tools are supported on IBM

®

 PC and compatible

machines.

1.1

Applications

The PIC16F526 device fits in applications ranging from
personal care appliances and security systems to low-
power remote transmitters/receivers. The Flash
technology makes customizing application programs
(transmitter codes, appliance settings, receiver
frequencies, etc.) extremely fast and convenient. The
small footprint packages, for through hole or surface
mounting, make these microcontrollers perfect for
applications with space limitations. Low cost, low
power, high performance, ease of use and I/O flexibility
make the PIC16F526 device very versatile even in
areas where no microcontroller use has been
considered before (e.g., timer functions, logic and
PLDs in larger systems and coprocessor applications).

TABLE 1-1:

FEATURES AND MEMORY OF PIC16F526 

PIC16F526

Clock

Maximum Frequency of Operation (MHz)

20

Memory

Flash Program Memory 

1024

SRAM Data Memory (bytes)

67

Flash Data Memory (bytes) 

64

Peripherals

Timer Module(s)

TMR0

Wake-up from Sleep on Pin Change

Yes

Features

I/O Pins

11

Input Pins

1

Internal Pull-ups

Yes

In-Circuit Serial Programming

TM

Yes

Number of Instructions

33

Packages

14-pin PDIP, SOIC, TSSOP, QFN

The PIC16F526 device has Power-on Reset, selectable Watchdog Timer, selectable code-protect, high I/O current capability and
precision internal oscillator.
The PIC16F526 device uses serial programming with data pin RB0 and clock pin RB1.

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PIC16F526

DS41326E-page 8

 2010 Microchip Technology Inc.

NOTES:

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 2010 Microchip Technology Inc.

DS41326E-page 9

PIC16F526

2.0

PIC16F526 DEVICE VARIETIES 

A variety of packaging options are available.
Depending on application and production
requirements, the proper device option can be selected
using the information in this section. When placing
orders, please use the PIC16F526 Product
Identification System at the back of this data sheet to
specify the correct part number.

2.1

Quick Turn Programming (QTP) 
Devices

Microchip offers a QTP programming service for
factory production orders. This service is made
available for users who choose not to program
medium-to-high quantity units and whose code
patterns have stabilized. The devices are identical to
the Flash devices but with all Flash locations and fuse
options already programmed by the factory. Certain
code and prototype verification procedures do apply
before production shipments are available. Please
contact your local Microchip Technology sales office for
more details.

2.2

Serialized Quick Turn 
Programming

SM

 (SQTP

SM

) Devices

Microchip offers a unique programming service, where
a few user-defined locations in each device are
programmed with different serial numbers. The serial
numbers may be random, pseudo-random or
sequential.
Serial programming allows each device to have a
unique number, which can serve as an entry code,
password or ID number.

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PIC16F526

DS41326E-page 10

 2010 Microchip Technology Inc.

NOTES:

Maker
Microchip Technology Inc.
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