Texas Instruments’ 5400 and 7400 TTL quad 2-input NAND gate has been in continuous production ... we could hook up an LED or make an astable flip-flop if we wanted to. But the interesting ...

The first flip-flops, known as "trigger circuits," were constructed with two transistors. Subsequent designs use two NOR or NAND logic gates. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other ...