Back
in the 1980's, the entire industry's TTL, at least in the DIP packages, became
buggy due to ground bounce.
At a
minisupercomputer startup called Multiflow, we were trying to ship large
machines with thousands of FAST
and
Advanced Schottky TTL chips that were all screwed up because of the lead
inductance inside the packages.
We
eventually discovered that 22V10's were properly designed, didn't suffer much if
any ground bounce, and
could
be programmed to do a lot of what the entire rest of the TTL line did. So if you
look inside any Multiflow
machines (think museums here) you'll see a lot of those 22V10's. Not to
mention you could fix design flaws
after
the fact, which otherwise required wires tack-soldered to the
PCB's.
Old
days indeed...-BobC
The Micronix motherboard was all *through-hole* 22V10 PALs. I counted like 140
of them (other motherboards used chip sets from Chips and Technologies). The
motherboard alone (no processor) pulled 34A at +5V. I paid like $299 for a Cyrix
387 math co-processor and this was "a great deal". Ah, the good old days.....
Paul S.