How can I use an eprom 27c64 to the place of one 2732??
thanks
Nicola

fastweb wrote:
How can I use an eprom 27c64 to the place of one 2732??
thanks
Nicola



You have to do something with the extra address line. Tie it high or low
or to another address line.
You don't say which 2732. 2764 and up had pretty stable pinouts.
2732s came in a variety of pinouts. You may have to swizzle pins.
Your 64 is probably faster than the 32. Properly designed circuits
won't care, but there are a lot of BAD circuits in the world.
This all assumes you can program it and forget it. If you have to
program it in circuit, a whole bunch of other issues come up.
mike

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On Thu, 20 Oct 2005 06:52:23 -0700, mike wrote:

fastweb wrote:
How can I use an eprom 27c64 to the place of one 2732??
thanks
Nicola



You have to do something with the extra address line. Tie it high or low
or to another address line.
You don't say which 2732. 2764 and up had pretty stable pinouts.
2732s came in a variety of pinouts. You may have to swizzle pins.

The difference is a bit more than that - the 2732 is a 24-pin and the 2764 is a
28-pin package. So an adaptor of some kind is required to have a 2764 fit into
an existing 2732 "hole".

If the O/P is referring to availability for a new or updated design, your
comments are appropriate.