EEPROM Marking codes

[zesti]

Hi all,
New to this web site. I'm eltronics repair business and playing also with eeproms. Now I cam accross eeproms with starnge marking codes. And its hard to find them online. So need help, if any one could help out, like this eeprom with marking code AAY2F and Q935 below. Image is attached.

Thanks.

[wraper]

image is broken.

[Alex Eisenhut]

File size shows as 0KB, something's wrong!

[zesti]

Sorry for attachment. I think I unplugged my mobile while tranferring. Thanks for notifying.

[amyk]

How sure are you that it's an EEPROM?

[zesti]

How sure are you that it's an EEPROM?

That's on an HP printer drum unit life counter PCB.

[thm_w]

If it can't be found online, most likely its a custom part number chosen by HP. Since they order mass amounts of these.
What you could do is connect to it with an eeprom programmer and try to detect what IC it is. Some have that functionality. Or map out the pinout and choose a similar part that matches up, then up the size until you start seeing the data loop and repeat.

I don't know if this is relevant: https://h30434.www3.hp.com/psg/attachments/psg/Printing/2868898/1/111reset.pdf

[DavidAlfa]

Probably custom so you can't simply plug it to a CH341 and reset it.

[zesti]

Yes , I was thinking the same. Will try and let you know. At least I can guess with pin layout of chip.
The link in not relevent, thanks anyways.