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Help IDing IC [Solved] (thelemmy.club)
submitted 3 months ago* (last edited 3 months ago) by to c/askelectronics@discuss.tchncs.de
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I am working identifying a problem in a VFD for a friend's belt grinder, and I've ID'd the other ICs on but, but I wasn't able to ID this last 8-pin one. I know it's made by Microchip, but couldn't pull anything up from the codes on the front.

It's possible this is an encryption key chip with some obfuscated info on the front. However, I don't know how common that actually is.

Any help is appreciated.

UPDATE: Looks like this one's solved. I went back and double-checked the code, and it looks like y'all were correct on it being '4A08I' and not '4A081'. This chip is also the closest IC to the MCU which lines up perfectly with this being an EEPROM.

I appreciate everyone's input and help with this!

8-pin IC Microchip logo bottom right Code reads: "4A081 8444QC"

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[–] 11 points 3 months ago (1 child)

Sometimes the abbreviations are interesting. It is hard to tell without more context, but if I has to guess it is an 8 pin EEPROM for the VFD or something: https://ww1.microchip.com/downloads/aemDocuments/documents/MPD/ProductDocuments/DataSheets/24AA08-24LC08B-24FC08-8K-I2C-Serial-EEPROM-DS20001710.pdf

Either way, the code isn't 4a081, it is 4a08i.

The second line is useless for determining what it is, since it is manufacturing batch traceability info.

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    • [–] 8 points 3 months ago* (3 children)

    Can you get a clearer photo? Having trouble telling B from 8.

    It could also help to see the rest of the circuit - the other components may provide context clues.

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  • [–] [S] 6 points 3 months ago

    I will grab a better photo when I get home in 12-ish hours.

    The code is 4A081 8444QC as far as I can tell. I didn't get any matches for an 8-pin IC of that code unfortunately.

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  • [–] [S] 3 points 3 months ago (1 child)

    So I think the answer was found by a couple of the others, but I will still follow through with other photos.

    Here's a (if only slightly) clearer image of the IC code

    And here is a zoomed-out shot of the entire board. You can see the tiny IC in question to the left of the MCU with the '56/1.10' sticker on it.

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    • [–] 2 points 3 months ago* (1 child)

    My search converged with the other commenter and found the same link they did.. (I completely skipped over the link they provided somehow before I started my own looking.)

    But yeah, I agree it's probably an EEPROM and you might be able to copy it?

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    • [+] 1 point 3 months ago
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