I don't have much of old ICs in my collection; these are maybe the most unusual to me.
I didn't know RCA was making SRAM as late as '88. Then again, I never saw RCA making semiconductors in my lifetime -- they divested that a long time ago, indeed.
The PICs I don't think are all that remarkable actually, but just to tease Alex; mine's bigger.
![Tongue :P](https://www.eevblog.com/forum/Smileys/default/tongue.gif)
The COP8 is a pretty basic, ordinary, but pretty obscure, microcontroller. Amazingly enough, it's still supported to this day! Example:
https://www.digikey.com/product-detail/en/texas-instruments/COP8SGE728M8-NOPB/COP8SGE728M8-NOPB-ND/366487 Not cheap by any means, but I'm guessing it's used in a lot of military stuff or something, hence the need to keep it alive?
![Flogging A Dead Horse :horse:](https://www.eevblog.com/forum/Smileys/default/DeadHorse.gif)
I have a couple chips older than 1980, I think? Forget what, I didn't run across them when I was digging these out. I don't recall having any white ceramic parts. The RCA package is different, much more gray and silvery colored (I wonder if the lid is just soldered on -- and I wonder if it's 90 or 100% Pb instead of AuSn?). To me, it seems somewhat more remarkable that a lot of these chips are as new as they are -- late 90s. It seems so strange to see CERDIPs from that era.
Most of these older chips came from a junk box, that must've been left over from a design engineer long ago. Seems to span 80s to early 00s, everything from ATmega to Z80, with a "golden age" centered on 90s embedded systems: lots of EPROMs, SRAMs, 8 and 12 bit DACs, and some PALs and early CPLDs.
Tim