I have to deliver a unit with several 16C63 PICs and 24C32 EEPROMs.
After I built a prototype, a temp spec was added of +77deg C. The
commercial temp range goes to +70 deg C.

My question is - are the industrial and automotive grade PICs a
different design, or are they a select in test kind of part?

If they are the former, where do I get the high temp parts? If the
latter, can I just heat up the PICs I have to 80 deg C and see which
ones break?

Also, does the clock speed affect this? I'm running at 20MHz.

I guess I should also mention that these are windowed parts.

Thanks,
Paul Kolesnikoff