Latches and flip-flops

Abstract

Latches and flip-flops are basic sequential logic devices. The operation of SR and D latches are presented. The application SR latch for eliminating contact bounces in mechanical switches is explained. The operation of D, T and JK flip-flops is explained. Flip-flops using Master-Slave latches are also explained. Set-up time and hold time are the timing requirements of flip-flops. The timing requirements of flip-flop are defined and the method of measuring them is presented.