JK flip – flop is named after Jack Kilby, the electrical engineer who invented IC. A JK flip – flop is called a Universal Programmable flip – flop because, using its inputs J, K Preset and Clear, function of any other flip – flop can be imitated. A JK flip – flop is the modification of SR flip – flop with no illegal state. The digital circuit is a flip - flop which has two outputs and are of opposite states. It is also known as a Bistable Multivibrator. Types of Flip - Flops Given Below are the Types of Flip - Flop SR Flip Flop JK Flip Flop D Flip Flop T Flip Flop Logic diagrams and truth tables of the different types of flip - flops are as follows: S-R Flip Flop The JK Flip Flop is the most widely used flip flop . It is considered to be a universal flip flop circuit. The JK Flip Flop name has been kept on its inventor's name Jack Kilby. Understanding the functionality, characteristic equation of JK Flip Flop , its operating modes and JK flip flop truth table is crucial for designing and implementing complex digital systems, contributing to the advancement of modern electronics.