EPROMs: Difference between revisions

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{{To do|Random notes I'm taking while dumping EPROMs. Will be a proper article in the future.}}
== Common EPROM types ==
== Common EPROM types ==
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Latest revision as of 21:24, December 17, 2025

Common EPROM types

Type Size Size (hex) Name ID Manufacturer
8-bit
27C1000
(non-JEDEC) 		128 KB 0x20000 M27C1000 2086 ST Micro
HN27C101 0738 Hitachi
HN27C301 - Hitachi
D27C1000 - NEC
uPD27C1000A 1016 NEC
27C2001 256 KB 0x40000 M27C2001 2061 ST Micro
27C4001 512 KB 0x80000 M27C4001 2041 ST Micro
TC574000 988C Toshiba
TMS27C040 9750 TI
D27C4001 10C8 NEC

27C1000/27C1001

There are two types of 128KB/1Mbit EPROMs — 27C1001 and the non-JEDEC compliant 27C1000. Their pinouts have the A16 and output enable pins switched. An adapter/jumper wire is needed on some EPROM dumpers. The switched pins are marked red in the pinout pictures below.

Pinouts

  • M27C1000 pinout.png
  • M27C1001 pinout.png
  • M27C2001 pinout.png
  • M27C4001 pinout.png
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