Newsgroups: comp.robotics
Path: brunix!sgiblab!swrinde!cs.utexas.edu!uunet!hobbes!earth.armory.com!rstevew
From: rstevew@armory.com (Richard Steven Walz)
Subject: Re: EPROMS
Organization: The Armory
Date: Sat, 19 Mar 1994 12:04:52 GMT
Message-ID: <CMwuw5.K5C@armory.com>
References: <2m71b1$90l@e2big.mko.dec.com>
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In article <2m71b1$90l@e2big.mko.dec.com>,
david nield <david@force4.lzo.dec.com> wrote:
>
>Hi,
>	I have some old 2732 EPROMS that I want to program but I'm unsure
>of their pin assignments and programming voltages/characteristics. Has anyone
>out there got some data on the following:
>
>	Hitachi HN462732G
>	Intel	D2732
>	F	MBM2732-45
>
>I know 4K Eproms are tiny these days but they are ideal for a small controller
>board that I'm building.
>
>thanks in advance
>
>dave nield
---------------------------
Very litle difference from larger EPROMs as you will see:

All three of yours are the same, I believe.


           2732's                                   2764's
id    pin         pin    id               id    pin        pin    id
-------------------------------       ---------------------------------
A7     1          24     Vcc              Vpp    1          28    Vcc
A6     2          23     A8               A12    2          27    PGM~
A5     3          22     A9               A7     3          26    NC
A4     4          21     A11              A6     4          25    A8
A3     5          20     OE~/Vpp          A5     5          24    A9
A2     6          19     A10              A4     6          23    A11
A1     7          18     CE~              A3     7          22    OE~
A0     8          17     O7               A2     8          21    A10
O0     9          16     O6               A1     9          20    CE~
O1    10          15     O5               A0    10          19    O7
O2    11          14     O4               O0    11          18    O6
GND   12          13     O3               O1    12          17    O5
                                          O2    13          16    O4
                                          GND   14          15    O3 

And you'll notice the pattern similarities between these types.
It will take very little change in your socket to program these 2732's
if you can do 2764's. Note that the 2732's need Vpp of 25V, but 2732A
must have a Vpp of no more than 21V!!
-------------------------------------
-Steve Walz   rstevew@armory.com

