On Tue, Feb 27, 2018 at 8:44 PM, Ethan Dicks <ethan.di...@gmail.com> wrote: > Hi, all, > > I'm going through a box of random ICs... > > The IC is a 20-pin ceramic body with side brazed legs, gold pins, chromed > lid, with NEC D2168D on it with "-2" painted on the ceramic and date codes > from 1984. It's almost certainly a RAM chip of some kind, but I'm not > finding any pinouts or data sheets.
I found more parts of a similar nature which helped untangle this... It appears to be the same configuration as the Mitsubishi M5M2167S, which was easier to find. A document somewhere pointed me to the full part number of my initial search of uPD2167D (the "uP" on the front made all the difference). 16Kx1 55ns SRAM (-2 variant), 20 pins, crossed with Fujitsu and Intel 2167 parts, and the Inmos IMS1400. Still don't know what vintage machines this might have appeared in. Anyone know? -ethan
