> Hi Dave
>
> This is sort of a little bit late, but I only saw one part of your question
> answered. You asked how one can tell the version of silicon?
>
> According to the databook the following package marking is applicable:
>
> MMMMMMMMM
> AABBCDE
>
> Legend:
> MM..M   Microchip part number information
> AA   Year code   (This will get interesting in Y2K!!)  :-)
> BB    Week code
> C       Facility code of plant where wafer is manufactured
> D       MASK REVISION NUMBER for microcontroller
> E        Assembly code of plant or country in which part was assembled.

The letter after the part number also tells you if it is a revised mask.
For instance, a 16C74A is the 'A' revision of the 16C74.

--
Friendly Regards

Tjaart van der Walt
mailto:tjaart@wasp.co.za
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