# Help identify part by marking code

**URL:** <https://forum.digikey.com/t/help-identify-part-by-marking-code/46208>\
**Category:** Integrated Circuits (ICs)\
**Tags:** linear, part-identification\
**Created:** [November 5, 2024, 1:04pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208 "2024-11-05T13:04:19Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![muhammedkanjo1995](https://avatars.discourse-cdn.com/v4/letter/m/4af34b/32.png) [@muhammedkanjo1995](https://forum.digikey.com/u/muhammedkanjo1995)\
**Post date:** [November 5, 2024, 1:04pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208/1 "2024-11-05T13:04:19Z")

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![WhatsApp Image 2024-11-05 at 4.03.22 PM](https://global.discourse-cdn.com/digikey/original/3X/c/5/c55f10d5eafba3063780d5713dfbf3ae25b0704e.jpeg)

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**Author:** ![Steve\_Fellman](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Steve\_Fellman](https://forum.digikey.com/u/Steve_Fellman)\
**Post date:** [November 5, 2024, 1:24pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208/2 "2024-11-05T13:24:18Z")

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Hello,  
Welcome to the DigiKey TechForum. I did a search on the markings and came up with nothing. Do you have a schematic or any information on this part besides the markings? Can you take an expanded photo of the part showing the board to see how this is being used ?

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<div class="post-metadata">

**Author:** ![muhammedkanjo1995](https://avatars.discourse-cdn.com/v4/letter/m/4af34b/32.png) [@muhammedkanjo1995](https://forum.digikey.com/u/muhammedkanjo1995)\
**Post date:** [November 5, 2024, 1:38pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208/3 "2024-11-05T13:38:10Z")

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![WhatsApp Image 2024-11-05 at 4.35.06 PM](https://global.discourse-cdn.com/digikey/original/3X/2/f/2f8193a52503c4f7aab6e2da8edaa33ba5be369b.jpeg)

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**Author:** ![chris\_groom](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/chris_groom/32/54044_2.png) [@chris\_groom](https://forum.digikey.com/u/chris_groom)\
**Post date:** [November 5, 2024, 2:03pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208/4 "2024-11-05T14:03:53Z")

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I’m drawing a blank here as well, at least in our own catalog. Hopefully someone on the forum will recognize this.

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**Author:** ![Adam7](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/adam7/32/48093_2.png) [@Adam7](https://forum.digikey.com/u/Adam7)\
**Post date:** [November 5, 2024, 7:11pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208/5 "2024-11-05T19:11:15Z")

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Please, provide the device model and take a full photo of the board.

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**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\
**Post date:** [November 5, 2024, 8:09pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208/6 "2024-11-05T20:09:09Z")

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Your schematic implies that it is comparing a 1Vac signal to 0.5V, set by the voltage divider of the two resistors. A comparator or an adjustable voltage detector are likely candidates.

Output would be a square wave fed to the MCU at the frequency of the 1Vac signal.

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<div class="post-metadata">

**Author:** ![Adam7](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/adam7/32/48093_2.png) [@Adam7](https://forum.digikey.com/u/Adam7)\
**Post date:** [November 5, 2024, 9:01pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208/7 "2024-11-05T21:01:18Z")

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Very close to the LMV331IDBVR chip.

 ![изображение](https://global.discourse-cdn.com/digikey/original/3X/d/4/d422a91e06671ff975518e16c5e368459caa1beb.png)

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<div class="post-metadata">

**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\
**Post date:** [November 5, 2024, 9:24pm UTC](https://forum.digikey.com/t/help-identify-part-by-marking-code/46208/8 "2024-11-05T21:24:44Z")

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Agree. Typical pinout of a comparator. The [MCP6541UT-E/OT](https://www.digikey.com/en/products/detail/microchip-technology/MCP6541UT-E-OT/857498) would be another example.

 ![image](https://global.discourse-cdn.com/digikey/original/3X/1/7/1740d15b642c3833710f31d67ce6b6fbbd22fde4.png)