? 2001 microchip technology inc. ds41127b-page 1 device migrations this document is intended to describe the functional differences and the electrical specification differences that are present when migrating from one device to the next. table 1 shows the considerations that must be taken into account when migrating from the pic16c55 to the pic16c55a. table 1: pic16c55 ? pic16c55a differences note: this device has been designed to perform to the parameters of its data sheet. it has been tested to an elec- trical specification designed to determine its conformance with these parameters. due to process differ- ences in the manufacture of this device, this device may have different performance characteristics than its earlier version. these differences may cause this device to perform differently in your application than the earlier version of this device. functional differences no. difference h/w s/w prog. 1 master clear filter added, pic16c55a. see electrical specification #30 4 2 programming algorithm change, pic16c55a uses a new programming algorithm 4 4 oscillator configuration bits are user selectable on the pic16c55a 4 pic16c55 ? pic16c55a migration
ds41127b-page 2 ? 2001 microchip technology inc. electrical specification differences parm. no. sym. characteristic pic16c55 data sheet pic16c55a data sheet units conditions min typ max min typ max v dd supply voltage xt, rc options lp option hs option xt, rc opt. extended lp option extended 3.0 2.5 4.5 3.25 2.5 6.25 6.25 5.5 6.0 6.0 3.0 2.5 4.5 3.0 3.0 5.5 5.5 5.5 5.5 5.5 v v v v v note 4 note 4 i dd supply current xt and rc options hs option lp option, commercial lp option, industrial 1.8 4.8 15 15 3.3 10 32 40 1.8 4.5 14 17 2.4 16 32 40 ma ma ma ma note 1 note 2 note 3 note 3 i pd power down current industrial extended 4.0 0.6 5.0 0.8 14 12.0 22 18 4.0 0.25 4.5 0.3 14 5.0 22 18 ma ma ma ma v dd =3.0v wdt enabled wdt disabled wdt enabled wdt disabled v il input low voltage i/o ports v ss 0.2v dd v ss v ss 0.8 0.15 v dd v v 4.0v 2001 microchip technology inc. ds41127b - page 3 information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. it is your responsibility to ensure that your application meets with your specifications. no representation or warranty is given and no liability is assumed by microchip technology incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. use of microchips products as critical com- ponents in life support systems is not authorized except with express written approval by microchip. no licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. trademarks the microchip name and logo, the microchip logo, pic, picmicro, picmaster, picstart, pro mate, k ee l oq ,seeval, mplab and the embedded control solutions company are reg- istered trademarks of microchip technology incorporated in the u.s.a. and other countries. total endurance, icsp, in-circuit serial programming, filterlab, mxdev, microid, flex rom, fuzzy lab, mpasm, mplink, mplib, picc, picdem, picdem.net, icepic, migratable memory, fansense, economonitor, select mode, dspic, rfpic and microport are trademarks of microchip technology incorporated in the u.s.a. serialized quick term programming (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. ? 2001, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. microchip received qs-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona in july 1999. the companys quality system processes and procedures are qs-9000 compliant for its picmicro ? 8-bit mcus, k ee l oq ? code hopping devices, serial eeproms and microperipheral products. in addition, microchips quality system for the design and manufacture of development systems is iso 9001 certified. note the following details of the code protection feature on picmicro ? mcus. ? the picmicro family meets the specifications contained in the microchip data sheet. ? microchip believes that its family of picmicro microcontrollers is one of the most secure products 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 knowl- edge, require using the picmicro microcontroller in a manner outside the operating specifications contained in the data sheet. the person doing so may be 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 product. if you have any further questions about this matter, please contact the local sales office nearest to you.
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