2 Jan
2007
2 Jan
'07
2:07 p.m.
For my final post -- About 20 TTL packages ( 80 2
input nand gates )
are needed for a simple 1 bit , bit slice PCB. XOR gates, Flip/flops
and muiltiplexers sure take up several packages.
You can make a 2-input XOR gate from 4 NANDs (a single 7400). Ditto a
2-input single-bit mux. And of course a pair of SR flip-flops take up a
single 7400...
Making a JK or equivalent would be a few pacakges, though. I've not
worked it out, but I think a master-slave JK flip-flop is 3 or 4 7400s.
-tony