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In telephone networks, multiple audio signals are integrated on a single line of transmission with the help of a multiplexer. Multiplexers are used in computer memory to maintain a huge amount of memory in the computers, and also to reduce the number of copper lines required to connect the memory to other parts of the computer. By using a multiplexer, the efficiency of the communication system can be increased by allowing the transmission of data, such as audio and video data from different channels through single lines or cables. Multiplexers are used in various applications wherein multiple-data need to be transmitted by using a single line.Ī communication system has both a communication network and a transmission system. The controlling of multiplexer can be done by using additional I/O ports.Switching ports can be handled by adding the complexity of firmware.The ports which can be utilized at the same time have limitations.

Additional delays required within switching ports & I/O signals which propagate throughout the multiplexer.The disadvantages of multiplexer include the following. The logic design can be simplified through MUX.MUX is used to implement several combinational circuits.The digital system reliability can be improved using a MUX as it decreases the number of exterior wired connections.The multiplexer ability can be extended to switch audio signals, video signals, etc.The dissipation of heat is less because of the analog switching current which ranges from 10mA to 20mA.The multiplexer can make the transmission circuit less complex & economical.Mux doesn’t require K-maps & simplification.The implementation of a number of combination circuits can be possible by using a multiplexer.

It reduces the cost as well as the complexity of the circuit.

In multiplexer, the usage of a number of wires can be decreased.

Thus, data input D0 is transmitted to the output ‘q” For example, when the control bits AB =00, then the higher AND gates are allowed while remaining AND gates are restricted. The following figure shows the 4X1 multiplexer circuit diagram using AND gates. The control bit AB decides which of the i/p data bit should transmit the output. The o/p ‘q’ depends on the value of control input AB. The four input bits are namely 0, D1, D2, and D3, respectively only one of the input bits is transmitted to the output. The 4X1 multiplexer comprises 4-input bits, 1- output bit, and 2- control bits. Multiplexers are classified into four types: When the multiplexer is used for digital applications, it is called a digital multiplexer. In analog applications, multiplexers are made up of relays and transistor switches, whereas in digital applications, the multiplexers are built from standard logic gates. Multiplexers are capable of handling both analog and digital applications.