On 26 Nov 97 at 6:48, Tjaart van der Walt wrote:

> 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.
>

That is true. The mask revision number after the date is though a "minor"
silicon revision, mainly intended as updates and error fixes, whereas the 'A'
version comprises of major changes as for e.g silicon shrink or configuration
changes. It is recommended (and Microchip correct me if I am wrong) to
re-compile the code for the new devices and there might be a need
to re-qualify the design for critical applications.

Kind regards,
Christof
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Christof Tolken
FAE, PACE South Africa
Tel:  +27 (011) 974 1211
FAX:  +27 (011) 974 1271
Cell: 083 227 3546
mailto: ctolken@pixie.co.za
www: http://home.pix.za/ct/ct000004/
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