T flip-flop is known as toggle flip-flop. The T flip-flop is modification of the J-K flip-flop. Both the JK inputs of the JK flip – flop are held at logic 1 and the clock signal continuous to change as shown in table below.

Truth Table of T flip-flop

Clk

T

Q

Q^’

0

1

Previous or memory state

0

0

1

0

1

1

Toggle state