What are these ICs, help me find datasheets!

[cy-yzm]

What are these ICs?

In the frequency counter,there are the two chips:
The first chip: S 10125N FFS7875 8927VK

The second chip: PSSR SP9680 .8919A

What are these ICs?

Where may I find their data sheets?

 

[casual3_2002]

Re: What are these ICs?

In the frequency counter,
The second chip: PSSR SP9680 .8919A

the second one might be a voltage comparator, here is a similar IC:
www.intersil.com/data/fn/fn2/fn2749/fn2749.pdf

in this pdf file, search SP9680, and the Intersil IC is pin compatible with it.

BTW, the first one might be a level translator ECL -> TTL,
www.americanmicrosemi.com/products/specs/10125N.phtml

casual3

 

[DavidP]

The sp9680 is a very old prescaler, I think it was made by Plessey.

David