> Yes, my experience is that they're very robust, which is 
> why I am
> surprised they're having failures. They are socketing them 
> also.
> Taking them out of the socket and replacing them doesn't 
> help, so it
> isn't corrosion on the sockets/pins. Neither does 
> re-programming,
> they have to replace the CPLD. And they're not failing in 
> use, but
> rather failing after they have been tested, and then put 
> into
> storage. Very very weird.

Sounds like ESD or a variant.

Good electrostatic handling and storage?

If you program, test, store, unstore, retest then does the 
storage period make a difference to failure rates? ie is it 
the act of storage and retrieval that's at fault rather than 
the storage or other things? If you store some totally 
differently (say wrapped in Al foil in your desk drawer ...) 
does it change what happens?



        Russell 

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