Was looking for 555's in my parts box, and while I did find one NE555, I found a dozen of these, in the same pouch. Wondering if the seller pushed me some slugs, because I can't find datasheet for this part. Not even in the Chinese / Russian parts search sites !!
The form-factor is same as NE555 (8 pin DIP), and markings on top say –
ATML U942
2FB 2
9H07258
and the bottom die sealant says that it's manf'd in Thailand.
Best Answer
That is an Atmel AT24C512B. Two-wire Serial EEPROM, 2.5V, 512K (65,536 x 8).
See the AT24C512B datasheet page 13 for markings.