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Poupout
Visitor II
March 25, 2024
Question

Obsolete component identification help

  • March 25, 2024
  • 2 replies
  • 1735 views

Hello,

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

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

Thanks

UC2843A.jpg

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2 replies

Andrew Neil
Andrew Neil
Super User
March 25, 2024
@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
Peter BENSCH
Technical Moderator
March 25, 2024

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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