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2:1 Multiplexer in Digital Electronics

2:1 Multiplexer in Digital Electronics

2:1 Multiplexer

  • A 2-to-1 multiplexer consists of two inputs Do and D1 and one select line S and one output Y. Depends on the select signal, the output is connected to either of the inputs.

    • The block diagram of 2:1 multiplexer

  • The mux will be enabled if enable(E) is activated. After enabling if the select line is low, then the output will be switched to D1 input. The boolean expression for the output becomes Do = when S=0 and output is D1 when S=1.

    • Boolean expression for 2:1 multiplexer

    Y = Do S' + D1 S
  • The logic circuit of 2:1 multiplexer can be implemented by using logic gates. It consists of two AND gates, one Not gate and one or gate. When the select line, S=0 the output of the lower AND gate is zero, but the Upper AND gate is Do. Thus the output generated by OR gate is equal to Do.
  • When S = 1, the output of the AND gate is zero, but the output of lower AND gate is D1. The output of the OR gate is D1. The boolean expression is satisfied
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Comments

  1. UnknownMay 31, 2021 at 8:14 PM

    Superb bro

    ReplyDelete
  2. John MJune 26, 2023 at 8:13 AM

    The diagrams easily drive the point home. A good post for digital electronics students!

    ReplyDelete

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