Basic JK Master Flip-Flops with Features

The J-K flip-flop can be wired to behave as most other types of flip-flop.

If J is high and K is low, Q will go high on the negative going edge of the clock pulse.

If K is high and J is low, Q will go low on the negative going edge of the clock pulse.

If J and K are both low, Q will not change.

If J and K are both high, the output toggles on the negative going edge of the clock pulse.