Unknown TI logic series

[Christian Corti]

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