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Associate
September 21, 2025
Solved

Help identifying this ST op amp

  • September 21, 2025
  • 2 replies
  • 268 views

I need help identifying a particular ST SOIC 8 op amp.

It has the markings: 204/ 9125

 

I hope to hear back from you as I am interested in this op amp but I cannot find out what it is.

ST unknown opamp.png

Best answer by AScha.3

Maybe LS204 , dual opamp:

AScha3_0-1758458108790.png

 

2 replies

AScha.3
AScha.3Best answer
Super User
September 21, 2025

Maybe LS204 , dual opamp:

AScha3_0-1758458108790.png

 

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garfoAuthor
Associate
September 21, 2025

Thank you. These seem to be obsolete now.

AScha.3
Super User
September 21, 2025

Seems so - but its nothing so special;  i would try as replacement : NCV20072DR2G

at mouser: 863-NCV20072DR2G , 50 ct . (also up to 36V , 3MHz GBW , dual opamp in so-8 )

or even a 4558 might be ok, if you have some around;

at mouser: 595-RC4558DR , 20 ct.

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Graduate
September 23, 2025

My best guess is that it could be a TS912 family dual op amp, but the “204  9125” marking doesn’t match any standard TS912 part number or marking that I’ve seen.