[sdiy] What is this IC?

[James Patchell]

221-235 sounds like an in-house part number.  The M8151 is probably a date 
code (1981, 51st week).  Chances are slim for tracking down what they are, 
hope you get lucky.

At 11:32 AM 2/14/2004 -0800, Scott Stites wrote:
>Hi,
>
>I'm hoping someone on the list can help me identify an IC - I have a tube of
>ten of them, and I'd like to know if they would be useful in any synth
>endeavours.
>
>They're 14 pin DIP's labeled '221-235'.  Beneath that, they have '014
>M8151' printed on them.  There is no manufacturer identifier on them.  I've
>googled and found nothing.  Does anybody know what these things might be?
>
>Thanks,
>Scott

         -Jim
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