Mystery IC number ?

[PLew]

Hello all

I don't know if this is the right sub-forum, I chose the one that seemed the closest.

I've been spending a bunch of time trying to find the part number of a seemingly simple IC, but just hitting walls. I've Googled using the manufacturers name and the #, and looked on the 2 companies I use that are also official suppliers Digikey and Mouser, but the 432 number is way too vague.

There's IC's with this # in it,like the STM micto-controllers, but they seem too big and complicated, this just generates an error code down a wire to a microcontroller circuit.
It seems to be for a LED circuit sensor/ error feedback circuit in a Martin moving light(Concerts, light shows, etc).

It seems 432 is the common # between the same IC on the same board on different units on the same board I replaced in the past that the IC was actually cracked (432wp, or 432wq), it has the ST logo on it. It's rectangular 4.3mm x 3mm(.169" x .118"), with 8 pins(4 per side) on the short ends.
Other than the error code it generates, the rest of the board seems to still operate.

For context, I'm a repair tech with many years of repairs at component level, and these boards are a couple hundred dollars, and getting harder to find, and a not uncommon problem, it seems a waste if the IC can just be replaced.

Manufacturers don't component lever repair boards or offer components these days,and it's an older model.

Thank you

Paul

[TDK · Accepted solution]

TSSOP8 package.

Can't find much either. Could be a part not for sale--specially made for that company.

At a wild guess, could it be EEPROM? No marking information given for this in the datasheet, but some of the numbers line up.

M24C32-F | Product - STMicroelectronics

Although if it's cracking, more likely to be a mosfet. Could probe a good board to see if the pinout matches.

[PLew]

I was hopeful when I saw that, and took another look at the boards, and one was lighter with the protective white coating so I could see paths better, and 1,3,4, & 7, the circuit board paths are all connected directly, and looking at that diagram, I measured 4 and 5, and just in case because the adjoining picture the o  for pin-1 marking looks 180 deg, I measured 1 and 8, and both sets measured resistance in the same direction to a diode.

So sadly that doesn't measure like a match ,

but thank you though for the suggestion

Paul

Edit: Sorry I missed that you mentioned eeprom and that mosfet, I was talking about the mosfet not matching it,

yes there's a possibility it's an eprom, I've never seen an eeprom crack before either, but I can try it and see if it works, it likely won't harm anything if it's not an eeprom. The only tricky part is heat as the board itself is an aluminium sheet acting like a heat sink

[Peter BENSCH]

As guessed by @TDK, the marking 432WQ stands in fact for the non-public and obsolete M24C32-WDW3TP, similar to the M24C32-WDW6TP.

Hope that helps?

Regards
/Peter

[PLew]

Thank you, yes there's a possibility it's an eprom, I've never seen an eeprom crack before but that doesn't mean it doesn't happen in extreme cases, but I can try it and see if it works, it likely won't harm anything if it's not an eeprom. The only tricky part is heat as the board itself is an aluminium sheet acting like a heat sink. I'll take a look on Digikey's website.

Paul

[TDK]

I have also never had an EEPROM crack like that. Would suggest something bad is happening electrically. Could be a transient voltage on startup or during load on/off which eventually breaks the chip.

[PLew]

It looks like it only appeared to be cracked, but taking a closer look and cleaning the area, I think I was mistaken,

But it's looking more likely that it is the IC that's being suggested by you guys, as 

looking at another bad board I saved, it says "2432" with no letters at the end.

There's also an IC next to it that also has the possiblity of being the culprit, but it was easy to find "SE95",

it says it's a "Temperature Sensor Digital", and the error it generates is "AURA CALIB ERR",

I'll be ordering both to be safe, if the one is an eeprom, it could get corrupted by the other.

Thanks again guys