[Free] Old Data Books (Australia)
Roy J. Tellason
rtellason at verizon.net
Wed Sep 5 23:57:21 CDT 2007
On Wednesday 05 September 2007 07:55, Dave McGuire wrote:
> On Sep 5, 2007, at 12:56 AM, Roy J. Tellason wrote:
> > Sure. I have a bunch of PALs around, mostly pulls from a bunch of
> > XT-class machines that Zenith made, and it's debatable whether there will
> > ever be a use for them. GALs, on the other hand, sound like they'be be
> > useful for all sorts of things. I should probably seek out some data on
> > these parts, or even a databook, somewhere. Got any pointers to specific
> > numbers?
> Datasheets for these parts aren't difficult to come by. Despite
> all the hype about them having been replaced by FPGAs and CPLDs, they
> are still a current product line from a few different manufacturers
> (Cypress and Atmel come to mind) and are available from most of the
> major distributors.
> The most popular ones seem to be the 16V8 and 22V10 (GAL16V8 and
I just need some point at which to get started. I'll have a look around,
then, with those numbers in mind...
> It's worth noting that some CPLD families are more-or-less direct
> implementations of common PAL architectures. A Xilinx XC9536 CPLD,
> for example, is very similar to two of what might have been called
> PAL36V18. This comes in very handy if you're experienced with PAL
> design and want to move into higher-density devices.
I've little experience with the current crop of programmable hardware, it's
just too "out there" for most of what I'd be into doing...
> The PALs that you have a pulls are likely useless because they're
> one-time programmable. GALs and PALCE devices are electrically-
> eraseable, and possibly some others, but not straight PALs.
Sure. Unless I run into somebody who for some reason wants to repair one of
those machines, or similar. But I'll use 'em as push pins before I just
toss 'em out.
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