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Combination Logic Tutorial

Tri-State Logic Tutorial

Tri-State Logic Diagram

With standard logic gates , the output is either HIGH or LOW.

With tri-state logic there is a third possible condition, the high impedance state, where the output is disconnected from the line.

This is useful where several gates are connected to a line.

Only one is enabled and can go high or low.

The others are disconnected.

Tri-State Logic Diagram

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