S/R LATCH (74hc279) (Restricted input situation)

[seyyah]

s-latch restricted

As you know in this latch S=0 R=0 situation is restricted situation but the output Q=1.
So when R=0 S=0 Q=1; R=0 S=1 Q=0. According to this If we tie out R to the ground then we can use S as inverter input. In this way this latch can be used as a NOT gate. What i wonder is, is this method reliable? (I tried and it works by the way) If so i'll get rid of one of the ICs. Thanks.

 

[laktronics]

Hi,
Yes, it will work, since SR is made of two two input NAND gates with cross connected outputs to one of the inputs of each gate. You can also get similar results from Qbar side.
Regards,
Laktronics