Which of these pins will allow to activate and deactivate a multiplexer?

2024

Which of these pins will allow to activate and deactivate a multiplexer?

  1. A.

    Enable pin

  2. B.

    Selection pin

  3. C.

    Present pin

  4. D.

    More than one of the above

  5. E.

    None of the above

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Show answer & explanation

Correct answer: A

The Enable (E or EN) pin acts as a master switch for the integrated circuit.

  • Active State: When the Enable pin is "active" (usually logic 0 for active-low or logic 1 for active-high), the multiplexer functions normally, passing the selected input to the output.

  • Inactive State: When the Enable pin is "inactive," the multiplexer is disabled. In this state, the output is typically held at logic 0 or placed in a high-impedance state (Hi-Z), regardless of what is happening at the selection or input pins.

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