29 Mar
2008
29 Mar
'08
2:39 p.m.
der Mouse wrote:
[Using other logic families]
> Of course, depending on how non-original you're willing to be....
There are problems, of course, when either the original chip never
existed in a different logic family, or when it has significantly
different pinouts or even characteristics. Certainly some 74Lxx numbers
are different to the 74LSxx part of the same number, and I think there's
one chip in the 7470-ish area) that has rather different functions in 2
logic families (I can look it up if you like).
This doesn't apply to the '194 AFAIK. It has made life 'interesting' for
me, though. I prefer, of course, to keep the original family, but I'd
rather fit a substitute than have a non-working machine. Computers are
not there to look nice on the shelf :-)
-tony