What is the hold condition of a flip-flop?only S is activeonly R is activeboth S and R inputs activatedno active S or R input

Hold Condition of a Flip-Flop

The hold condition of a flip-flop refers to the state where the output remains stable despite changes in input signals for a certain duration. In the context of a flip-flop, especially SR (Set-Reset) flip-flops, the hold condition is critical to ensure that the output does not change unintentionally during transitions.

1. Only S is active: In this scenario, the flip-flop sets to a high state. If R is inactive, the output will hold that state as long as R remains low.

2. Only R is active: Here, the flip-flop resets to a low state. If S is inactive, the state will hold until S becomes active.

3. Both S and R inputs activated: Activating both inputs simultaneously (which is generally not recommended in basic SR flip-flops) leads to an indeterminate state, causing the flip-flop to behave unpredictably.

4. No active S or R input: If both S and R are inactive, the flip-flop retains its last stable output, maintaining the hold condition.

In summary, the hold condition can be assured either by having only one of the S or R inputs active while the other remains inactive, or by having no active inputs at all, which guarantees that the output remains constant.