2x1 Mux Circuit Diagram. 1 mux using transmission gate. It is also known as a quad multiplexer ic.
This gate selects either input a or b on the basis of the value of the control signal c when control signal c is logic low the output is equal to the input a and when control signal c is logic high the output is equal to the input b. The size of the select pins depends on the width of the mux. Logic diagram of 2x1 mux figure 2 b.
You can find the detailed working and schematic representation of a multiplexer here.
Because it selects from two inputs only. A mux with 2 n input lines have n select lines and is said to be a 2 n. As a mux with 2 select lines can represent at max 4 inputs a 3 1 mux repeats some inputs for 2. The outputs of first stage 8x1 multiplexers are applied as inputs of 2x1 multiplexer that is present in second stage.
