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I got an EPROM without a window? Answered

I got the AT27C040 that is a 4-Mbit "EPROM" without a window.

After reading the datasheet, I was wondering:

  • Why an Erasable PROM would not be housed in a package with a window?
  • Is there any way I can erase it other than drilling a hole in it?
    • (I've heard that you can 'refresh' the EPROM to get the same result as UV)
    • Should I Just return the thing if there is a way to do so?

Discussions

0
Orngrimm
Orngrimm

6 weeks ago

From the Datasheet:
The Atmel® AT27C040 is a low-power, high-performance, 4,194,304-bit, One-Time Programmable, Read-Only Memory (OTP EPROM) organized as 512K by 8 bits.

Once programmed, never erasable.

EPROM = Electronic Programmable Read Only Memory
EEPROM = Electronically Erasable Programmable Read Only Memory

0
daigakusei
daigakusei

6 weeks ago

It's an OTP Memory.
You have one shot only.
From the documents for this chip.
"The Atmel® AT27C040 is a low-power, high-performance, 4,194,304-bit, One-Time Programmable, Read-Only Memory (OTP EPROM) organized as 512K by 8 bits."