2 Jul
2000
2 Jul
'00
2:42 p.m.
20C1 is a 24-pin programmable decoder with two sums of
8 product terms OR'd
into a single final Or/Nor gate. It's clearly intended for use as a
decoder, having 20 inputs and a single output sum of products with both true
and complement outputs on separate inputs.
It's right here in my '89 NS programmable logic databook.
If you want, I can (probably fairly soon) scan it for you and email you the
image (in TIFF).
No, that is OK, but thanks for the offer. I just found these in a pile of
"normal" PALs (16R8, 20L10, and the like), and started to get confused.
It appears that the 20C1 was a dog, as very few people seem to have used
it (or still sell it). I have never seen one on any scrap boards.
William Donzelli
aw288(a)osfn.org