Using just two NAND or inverter gates its possible to build a D type (or ‘toggle’) flip-flop with a push-button input. At power-up the output of gate N2 is at a logical ‘1’, ensuring that transistor T2 ...

The MM74HC74A is a dual D-type flip-flop that achieves an operating speed similar to the equivalent LS-TTL part. It can drive a maximum number of 10 LS-TTL loads. This device utilizes Fairchild’s ...