On Sun, 10 Jan 1999 11:02:55 +0100 Morgan Olsson <mrt@INAME.COM> writes:
>>> ..., sometimes the whole IC literally blows up.
>
>Sounds like the chip got into latch-up mode.

Or the users are abusing the tester, e.g. connecting it to live circuits.
 A resistor in series with the IC power is a good idea, if it is
ESD-latchup.  You might also consider making the multiplexer IC's
user-replaceable. Since 4051's are cheap and widely available, providing
sockets and writing up a procedure to replace them could save a return to
the factory after a user "oops".


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