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 -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu