29 Nov
2009
29 Nov
'09
11:05 a.m.
Hi
I still like the 38s the best. Open collector
parts can do so much more than just a logic function.
It's a pity there never as a TTL multiplexer with open-collector outputs.
That would be an ideal device.
I think I'll change my earlier choice and go for a '251 (same as a '151,
but with 3-state outputs). AFAIK there never was a 3-state output version
of the '150. A '251 can be used (wastefully) as a 3-state driver (onto
shared buses), as a 3-input logic gate, and so on.
-tony