Dec 8235 IC?

Jay Jaeger cube1 at
Fri Sep 4 10:09:03 CDT 2015

On 9/3/2015 11:50 PM, Chuck Guzis wrote:

> On 09/03/2015 08:49 PM, dwight wrote:
>> A pal could have worked as well. Dwight
> A GAL should also be useful--and maybe a bit more flexible.  To emulate
> the OC outputs, one can simply manipulate the output enable so that a
> '1' output is High-Z and '0' is, well, '0'.   I believe individual oput
> tristate control is allowed in non-registered mode for GALs.  A PALCE
> should also work.
> A 20 pin PLCC should fit on a DIP-sized PCB.
> --Chuck

Yup - see my other post on this topic, though I used a through-hole GAL
rather than a PLCC (the PLCC is really a good idea).

The issue with OC, though, might be what it was used for.  If it was
just used for wired OR / wired AND then, yeah, your idea should work OK.


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