We once believed that ESD was the main cause for the many warranty
repairs returning from the field.  A 4066 CMOS switch IC failed in all
the cases - the switch pins are exposed to human touching (desired or
not, it is there).

We tried numerous ways such as series resistors, caps, etc.  Finally,
rather than trying to learn all about ESD, we replaced it with MAX323.
 From then on, the problem is gone.  Sometimes, it is like in repair
jobs, if it works now, you might never be able to recreate the problem
- just fix it and fix it fast!

Please check the MAX323 out.  For one thing, it is 10 times the cost
of a 4066, ought to be better!!

Good luck and get it solved before Feburary 1999.

Rgds/ Bill

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