Hello Reg.

> We make a circuit board which is used in a medical device. It uses a
> 16C54 to sequence some valves. In the past several years, we have made
> tens of thousands of these assemblies. We have the 16C54's gang-
> programmed by the distributor. I won't say we've NEVER had one fail
> because of the PIC part, but offhand I'd estimate the failure rate is
> probably less than one in ten thousand. Maybe way less.

  Let me guess.  A SCD?

  Cheers,
        Paul B.