We use the 16c61, 16c711, 16c621, 16c622. The last 2 parts have hardware comparitors that you have to disable but have MUCH more RAM and code space than an '84. They are also cheaper. The 16c5x parts are cheaper still but differ significantly. You may have to re-write some or all of your code work with them. >I was wondering if any of you could quickly answer a question for me; is there >a direct replacement for the 16F84? Excluding the EEPROM of course. >From what I >know the 16C54 and the 16C56 look promising. Am I wrong? Thanks in advance! dwayne Dwayne Reid Trinity Electronics Systems Ltd Edmonton, Alberta, CANADA (403) 489-3199 voice (403) 487-6397 fax