Mux circuit diagram. Multiplexer has many inputs and single output. Multiplexers operate like very fast acting multiple position rotary switches connecting or controlling multiple input lines called channels one at a time to the output. The mux select inputs correspond to the functions input variables and are used to select one row of the truth table. It is a combinational circuit with more than one input line one output line and more than one select line.
Multiplexer is a combinational circuit that has maximum of 2 n data inputs n selection lines and single output line. Implementing functions with multiplexers. Generally multiplexer and demultiplexer are used together because of the communication systems are bi directional. The boolean expression for the logic diagram can be given by.
A multiplexer can take any number of inputs line but then the selection line will be according to the number of inputs. The schematic symbol for multiplexers is. A mux has 2n input lines data lines and n control signal and a single output. Out s 0 d 0 d 1 s 0 d 0d 1 s 0d 0d 1 s 0d 0d 1.
In simple words it is the reverse of demultiplexer demux. June 23 2003 basic circuit design and multiplexers 23. A multiplexer abbreviated mux is a device that has multiple inputs and one output. A multiplexer of 2 n displaystyle 2n inputs has n displaystyle n select lines which are used to select which input line to send to the output.
It allows the binary information from several input lines or sources and depending on the set of select lines particular input line. The logic circuit diagram for the same is shown below the logic diagram utilises only the nand gates and hence can be easily build on a perf board or even on a breadboard. It is abbreviated as mux or mpx. A demultiplexer function exactly in the reverse of a multiplexer that is a demultiplexer accepts only one input and gives many outputs.
One of these data inputs will be connected to the output based on the values of selection lines. A multiplexer is a circuit that accept many input but give only one output. Chapter 9 combinational logic functions. The multiplexer or mux is a digital switch also called as data selector.
The truth table for a 2 to 1 multiplexer is. Since there are n selection lines there will be 2 n possible combinations of zeros and ones. Using a 1 to 2 decoder as part of the circuit we can express this circuit easily. We could implement a function of n variables with an n to 1 multiplexer.
It is a combinational digital circuit and generally called a data selector as well.