Re: EPROM manufacturer and device IDs

[thergen@svn.net]

Ludis,

The eprom manufacturer id codes used might be from a jedec standard
(www.jedec.org).  Try publication 106 (JEP106-H).

Tom

On Wed, 19 Jul 2000, Ludis Langens wrote:

> Does anyone have a handy list of EPROM identification codes?  My new
> programmer can access, display, and check the codes, but it doesn't tell
> me what they mean.  I have to keep trying various manufacturers and
> device types until the programmer doesn't complain (or turn off the checking).
> 
> In a related matter, the EPROM codes have let me confirm several GM
> vendor codes.  980 is Texas Instruments.  5012 is Intel.  014 is
> Fairchild and National Semiconductor.
> 
> My latest batch of GM EPROMs contained a TI 27128, two TI 27C128's, a
> Fairchild 27C256, and a NatSemi 27C32B.  The 27C32B has a date code from
> 1992.  I have another 27C32B also from 1992.  Several other vendor 014
> 2732 type EPROMs in my collection don't contain an ID code.  This means
> they might be a 2732, 27C32, or a 27C32H.  Two of these have programmed
> just fine as 27C32H's.  The H suffix means a 27C32 that programs with 10
> ms pulses, instead of the normal 50 ms.
> 
> FYI:  My old programmer couldn't program the 27C32B's.  They program
> just fine with the new one.
> 
> -- 
> Ludis Langens                               ludis (at) cruzers (dot) com
> Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
> 
> 

>