[sdiy] FS weird chips... collectors ???

[Peng]

I have some old Beckman chips, too. I've never found any info on them so... any ideas ?
 
I have Beckman 898-3-R470 and 898-3-R220. Both are 16 pin white chips.

harrybissell <harrybissell at prodigy.net> wrote:
Just kidding folks !

I have two Beckman 7556CU chips. They are hybrid with ceramic
cover and ceramic substrate. 36 pin x .6" DIL

Any guesses as to what these are. I'm thinking some kind of A/D or
D/A converter, as Beckman was known for precision resistors.

Who knows, maybe an R/2R ladder ?

ANY SUGGESTIONS that this might be a 'cmos dual timer' will be
promptly ignored, after flaming !!! :^P

H^) harry




		
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