datasheets for 82S21 - Signetics 32x2 SRAM?

[William Donzelli]

> I found the SN7485 and SN7486 but no SN7480 (or
> at least no datasheet). 

7480s were made by several manufacturers, but it was never a hugely
popular chip - sort of in the "second-string" functions of early 74xx TTL.

There are some real oddballs - 7459 is one (there was a thread on this a
few yars ago). I forget what it is - and I am not going to looking it up
again.

William Donzelli
aw288 at osfn.org