Electronics > Projects, Designs, and Technical Stuff

Fake AT28HC256E-12SI? + MAX EPM7128SLC84-15

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NivagSwerdna:
I bought some  AT28HC256E-12SI AT28HC256E 32K x 8 High Speed Parallel EEPROM SOP-28 on EBAY but for the life of me I cannot get the things to program using my MiniPro programmer

I also tried to write some software in my homebrew chip tester but get different but also failing results.

Any suggestions on how to test these before asking for a refund?

NivagSwerdna:

NivagSwerdna:
If I was being really paranoid I would say these have been sanded down and then reprinted??  (It's difficult to know how much their travel down the plastic tube would have caused abrasion)

NivagSwerdna:
A couple more pictures as I vent my frustration!

and

wraper:
Looks blacktopped. Try rubbing with acetone or similar solvent. Date code is certainly fake since lead surface doesn't look as something fresh.

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