Dec 8235 IC?

[Chuck Guzis]

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