19 Dec
2010
19 Dec
'10
1:22 p.m.
On Fri, 17 Dec 2010, John Robertson wrote:
TI and others often produced "House Numbers"
for companies that wanted to
hide the 'real' part numbers of components. I would assume this is what you
have here. Thus the SN1474 may not be a flip-flop (7474) as a result...they
may well have jumbled the numbers around to make it difficult to copy the
circuit.
But as I said they are wired just like the 74xx parts, i.e. the 1474 or
1476 have all the signals at the "right" pins like clock, inputs and
outputs. A gate from a 7400 is often used as inverter by connecting the
two inputs together, the same applies to some 1400. All pins from each
14xx type matches the corresponding 74xx counterpart.
Christian