Multiple choice

What does the 'Z' state of a 3-state buffer represent?

  1. Logic “0″

  2. Logic “1″

  3. High Impedance

  4. High Voltage

  5. High Current
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tri-state buffers, also known as 3-state buffers, are combinatorial elements that in addition to providing the two standard logic “0″ and logic “1″ states, can be made to provide a high impedance third state. This third state occurs when the gates output is effectively switched “OFF” or disconnected. This third state is often referred to as an “High-impedance”, “hi-Z“, or just “Z” state.

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