![]() S 0 S 1 S 2 Y 0 0 0 D 0 0 0 1 D 1 0 1 0 D 2 0 1 1 D 3 1 0 0 D 4 1 0 1 D 5 1 1 0 D 6 1 1 1 D 7 Truth Table of 8-to-1 Multiplexer 8 to 1 Multiplexer Boolean Expressionįrom the truth table, we can write the Boolean Expression for the output. The below table shows the truth table for the 8-to-1 multiplexer. So, the data input D 7 is selected and transmitted as output. If all the three select inputs, , then the bottom-most AND gate is enabled and all other AND gate is disabled. So, the data input D 0 is selected and transmitted as output. If all the three select inputs, , then the topmost AND gate is enabled and all other AND gate is disabled. A 8-to-1 Mux 8 to 1 Multiplexer Working Principle.The block diagram of the 8-to-1 multiplexer is shown in the figure below. Since the second input to the first AND gate is 1, its output is equal to its first input, which is Y = D 0. So, the output of the second AND gate is zero. Now, we know that for AND gate if any one input is zero, the output is zero. When S=0, it is applied directly as an input to the second AND gate, and inverted S that is 1 is applied as a second input to the first AND gate. The output of both the AND gates is applied as inputs to the OR gate.2 to 1 Multiplexer Circuit 2 to 1 Multiplexer Working Principle Select input S is applied to the second AND gate as a second input and an inverted input S is applied to the first AND gate as a second input. The block diagram, logic symbol and switching circuit analogy of 2-to-1 multiplexer is shown in the figure below.Īs shown, D 0 is an applied input to one of the AND gate and D 1 is an applied input to the other AND gate. To implement a 2-to-1 multiplexer circuit we need 2 AND gates, an OR gate, and a NOT gate. ![]() Multiplexers are also known as data selectors.Ī multiplexer is useful for transmitting a large amount of data over the network within a certain amount of time and bandwidth.Ī 2-to-1 multiplexer is the digital multiplexer circuit that has two data inputs D 0 and D 1, one selects line S and one output Y. The inputs to a multiplexer can be analog or digital. Applications of a Multiplexer What is a Multiplexer?Ī multiplexer (sometimes spelled multiplexor and also known as a MUX) is defined as a combinational circuit that selects one of several data inputs and forwards it to the output.Example: Obtain an 8-to-1 Multiplexer Using Two 4-to-1 Multiplexers.What is a Multiplexer Tree or Chaining Multiplexers?.
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