Herbert, you need a programmer that supports the 16F84. Most all commercial and `build it yourself' programmers now support the 16F84. - Tom At 08:32 PM 8/30/97 -0400, Herbert Graf wrote: [snip] >>MCHP is phasing out the C version. That's the real reason for the price >>difference. > OK, but is there any difference I should no about, will any programmer >for the C version work with the F version, is it electrically compatible, >such as current draw? Thanks for any info. TTYL