5 Sep
2007
5 Sep
'07
11:36 p.m.
Someone wrote:
PS. Iv'e got the 7400 pinout downloaded already. :)
Just remember that the 7401 is not an OC version of the 7400. :)
No, the O/C version of the 7400 is the 7403.
I've got to keep going back to the databook for
the chips with
"middle" supply pins, like the 7475.
Ne too, And I can never remember the pinouts of the more obscure JK
flip-flops, or some the lower-numbered counters with the outputs in a
crazy order.
The other thing to watch for (if you're repairing old hardware...) is
that there are some (IIRC) 74Hxxx chips where the pinout is totally
differeint for the 'plain' or LS version.
-tony