Yes, there is a difference.  The F877A is the newer die shrink version
and it programs differently than the older 877 -20/P. Programming
algorithm is the major difference.  Download the data sheets from
Microchip to see if there are other subtle differences.

Bill

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Vidal
Sent: Tuesday, February 10, 2004 10:06 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: [PIC:] !6F877A - I/P versus PIC16F877-20/P


I have bought two 16F877 from two different sources. Is there
a difference between the two?

Label 1reads  - 16F877A - I/P the other PIC16F877-20/P.

I was supposed to have 16F877A 20 Mhz.

Regards

Vidal

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