From: Michał Pleban <>
Date: Tue, 18 Sep 2012 09:02:12 +0200
Message-ID: <> wrote:

> What is best GAL or CPLD ?

That of course is a very general question ;-)

* GAL is an old chip, comparable to the PLA of 8-bit Commodores plus
flip-flops at the outputs. CPLD is bigger, has more IOs and more
flexible architecture allowing for much more sophisicated design.

* CPLD is harder to program and will need a special JTAG programmer, GAL
should be programmable by a decent EPROM programmer as well (at least
that's what my programmer advertises, never tried that) and building
your own GAL programmer is easy.

* It is hard to find 5V CPLDs now, the old Altera and Xilinx ones are
rare and expensive. I personally am working with Atmel 15xx chips which
are still available.

* Basing on the complexity, I am surprised about the price difference
you are quoting, it should be the other way around. I am sure you will
be able to find much cheaper GALs/PALs, but you will not find cheaper CPLDs.


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Received on 2012-09-18 08:00:04

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