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Explorer
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

    This topic has been closed for replies.
    Best answer by AScha.3

    Maybe LS204 , dual opamp:

    AScha3_0-1758458108790.png

     

    2 replies

    AScha.3Answer
    Super User
    September 21, 2025

    Maybe LS204 , dual opamp:

    AScha3_0-1758458108790.png

     

    garfoAuthor
    Explorer
    September 21, 2025

    Thank you. These seem to be obsolete now.

    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.

    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.