Help identifying quad OP Amp

CTack.2 · ‎2021-10-27

See picture above for exact markings. No markings on the bottom of the IC.

Battery powered device (low voltage)

Markings:

ST (e3) 7B589

VA1814

PHL 423

Alternate version has similar markings. Maybe just a date code change?

ST (e3) 7B474

VA1814

PHL 423

Peter BENSCH · ‎2021-11-04

Well, it's already published, just not where you expected it to be. As already stated, it is instead labelled on the box/packaging in which it is delivered.

Anyway - yes, I'm 100% sure VA1814 is the marking for TSZ124IPT.

Regards

/Peter

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Tesla DeLorean · ‎2021-10-27

My money is an ST second-source/equivalent to the LT1814

https://www.analog.com/media/en/technical-documentation/data-sheets/18134fa.pdf

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Peter BENSCH · ‎2021-10-28

@Community member is not completely right, it is the TSZ124IPT with marking VA1814.

Regards

/Peter

<edit>moved from Discontinued Devices to OPAMPs, because it is an active device</edit>

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Tesla DeLorean · ‎2021-10-28

I can't be right all the time, but it helps significantly if the markings match what's in the documentation, and the documentation with the markings is spidered by Google.

If your web-devs are searching for productive tasks not involving just changing/fiddling the look/feel of the web portal, might I suggest some part#/marking search index that can help narrow parts from the past/present, along with suggested ordering numbers, or replacement/substitute parts. Bonus points for lead time information, estimated EOL date and 10-20-30 year availability status.

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CTack.2 · ‎2021-10-28

@Peter BENSCH Why does this chip have that marking? I don't see any reference to that marking in the datasheet you linked. Is it maybe an older marking?

I would love to see @Community member's suggestion implemented.

Peter BENSCH · ‎2021-10-28

The information is usually on the packaging unit that is used to manufacture a system.

The marking scheme is not always mentioned in the datasheet, but STMicroelectronics is always happy to help if someone needs help with a reverse search.

Good luck!

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/Peter

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CTack.2 · ‎2021-11-03

So, you're saying that the markings I'm seeing, while not published, match some internal documentation that gives you confidence that these are actually TSZ124IPT parts?

Peter BENSCH · ‎2021-11-04

Well, it's already published, just not where you expected it to be. As already stated, it is instead labelled on the box/packaging in which it is delivered.

Anyway - yes, I'm 100% sure VA1814 is the marking for TSZ124IPT.

Regards

/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.