[Free] Old Data Books (Australia)

[Roy J. Tellason]

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 all the hype about them having been replaced by FPGAs and CPLDs, they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
> GAL22V10).

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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