Submitted 4 weeks ago by JayDee@lemmy.world to askelectronics@discuss.tchncs.de
https://lemmy.world/pictrs/image/680aae98-69e2-467d-b15a-47185e5506c9.jpeg
I am working identifying a problem for 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.
Can you get a clearer photo? Having trouble telling B from 8.
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.
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 Image
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.
Great photo! Clearly two eights and an I. And the proximity to the MCU corroborates the EEPROM theory.
Lulz. We converged in our search and found the same link you did… (I completely skipped over the link you 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? Dunno.
Greatly appreciate the help! I will add that to my documentation list. I think i’ll give dumping the ROM a shot if nothing else winds up working.
listener17@sh.itjust.works 4 weeks ago
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: ww1.microchip.com/…/24AA08-24LC08B-24FC08-8K-I2C-…
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.
JayDee@lemmy.world 4 weeks ago
That lines up with it being right next to the MCU. I greatly appreciate the assistance! I’ll get this into my notes in case it comes in handy.