Obsolete component identification help

Poupout · ‎2024-03-25

Hello,

I recovered an old component with the marking 2843A ST.

Can't find the Part number? UC2843AD1? An idea?

Thanks

Andrew Neil · ‎2024-03-25

@Poupout wrote:
I recovered an old component with the marking 2843A ST.

What did you "recover" it from? That may well provide useful context to narrow-down you search ...

PWM controller?

https://www.jotrin.com/product/parts/2843B#:~:text=2843A%20with%20circuit%20diagram%20manufactured%20by%20ST.%20The%202843A%20is%20available%20in%20SOP8%20Package

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

Peter BENSCH · ‎2024-03-25

Yes, it is the US2843AD1, obsoleted long ago.

You can check whether you can replace it with the UC2843BD1, which is pin-compatible but differs slightly in some respects.

Regards
/Peter

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