Jason White wrote:
> Recently I desoldered several old PCB's I got around 25 mysterious
> chips that seem to be manufactured by Texas Instruments. They are
> labeled 81C285T on what (usually) is the part number line and 210895
> on the date line (August, 21, 1995) in a 16 SOIC package. I also got
> what i apparently a pin for pin compatible chip marked as INB627,
> 1821-0895, by Motorola? from an identical PCB from another [same
> model] board.

These could be in-house part numbers.  Large companies will usually have
internal part numbers for every part they use, and sometimes get the
suppliers to label with these part numbers.  If that's the case, you're
probably out of luck.

Chips from old boards aren't likely to be all that useful for stuff you wan=
t
to do today, even if you can find the documentation and the chip didn't get
damaged in the process.  You might find some 74xxx series logic chips, but
you hardly use those anymore today and you can replace them with known
working ones for a few 10s of cents at worst.  Any programmable parts will
be so archaic by today's standard that you'd be better off getting a few
free samples of something modern from Microchip.

Harvesting generic electronic parts from old equipment simply isn't worth i=
t
today.


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