PIC12F635/PIC16F636/639
Data Sheet
8/14-Pin, Flash-Based 8-Bit
CMOS Microcontrollers
with nanoWatt Technology
*8-bit, 8-pin Devices Protected by Microchips Low Pin Count Patent: U. S. Patent No. 5,847,450. Additional U.S. and
foreign patents and applications may be issued or pending.
2007 Microchip Technology Inc. DS41232DNote 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 Microchips 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 Microchips code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device Trademarks
applications and the like is provided only for your convenience
The Microchip name and logo, the Microchip logo, Accuron,
and may be superseded by updates. It is your responsibility to
dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC,
ensure that your application meets with your specifications.
PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and
MICROCHIP MAKES NO REPRESENTATIONS OR
SmartShunt are registered trademarks of Microchip
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
Technology Incorporated in the U.S.A. and other countries.
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
AmpLab, FilterLab, Linear Active Thermistor, Migratable
OTHERWISE, RELATED TO THE INFORMATION,
Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
and The Embedded Control Solutions Company are
QUALITY, PERFORMANCE, MERCHANTABILITY OR
registered trademarks of Microchip Technology Incorporated
FITNESS FOR PURPOSE. Microchip disclaims all liability
in the U.S.A.
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
the buyers risk, and the buyer agrees to defend, indemnify and
dsPICDEM, dsPICDEM.net, dsPICworks, ECAN,
hold harmless Microchip from any and all damages, claims,
ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
suits, or expenses resulting from such use. No licenses are
In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi,
conveyed, implicitly or otherwise, under any Microchip
MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit,
intellectual property rights.
PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal,
PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB,
rfPICDEM, Select Mode, Smart Serial, SmartTel, Total
Endurance, UNI/O, 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.
2007, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona, Gresham, Oregon and Mountain View, California. The
Companys quality system processes and procedures are for its PIC
MCUs and dsPIC DSCs, KEELOQ code hopping devices, Serial
EEPROMs, microperipherals, nonvolatile memory and analog
products. In addition, Microchips quality system for the design and
manufacture of development systems is ISO 9001:2000 certified.
DS41232D-page ii 2007 Microchip Technology Inc.