In this process, serial data has been connected as input to the demultiplexer at a regular interval. Demultiplexer is also used in serial to parallel converter.In this process, the output of ALU is connected as input to the Demultiplexer and the output of Demultiplexer connected to the registers to store the data. In Arithmetic logic unit (ALU), the output of ALU can be stored in storage unit (multiple registers) by using Demultiplexer.In this easier process, Demultiplexer receive the output data of Multiplexer (as a receiver) and covert back them to the original form then. audio, video etc) using single line for transmission. Demultiplexer (Demux) and Multiplexer (MUX) both are used in communication systems to carry multiple data signals (i.e.The main function of Demultiplexer is to enable or select single output signal out of many inputs signals, therefore, they are widely used in microprocessor, computers and digital electronics as follow: 74155 TTL 1 to 4/8 Demultiplexer with Pin Configurations and combine Strobe pin (2) and Pin(14) to use as Data input. It can be used as 1 to 8 Demultiplexer if pin (1) and Pin (15) are combined together to form Control signal C. This IC gives inverted output except for Data input 2C pin(15) in case of 1 to 4 Demultiplexer. Its pin configuration is shown in the table given below. This enable pin is used to Enable or Disable one of the two individual DeMuxes.ħ4155 IC is a Decoder/Demultiplexer IC which can be used as a 2-4 decoder or 3-8 decoder or 1-4 Demultiplexer or 1-8 Demultiplexer. Schematic of 1 to 2 Demultiplexer using logic gates is given below.ĭemultiplexer needs And gates equal to the number of output channels and NOT gates equal to the number of Control signals. Y 1 = SD Schematic Diagram of 1 to 2 Demultiplexer using Logic Gates the truth table of 1 to 2 Demultiplexer is:Īccording to the truth table given above, the output expression is: You may also read: Digital Flip-Flops, SR, D, JK and T Flip FlopsĬonsider input as D and output as Y 0,Y 1,and Control signal S.There is also an Enable bit used for enabling or disabling the circuit. When the control signal is “1”, the second output channel is selected as a route for input data. When the control signal is “0”, the first output channel is selected. This Demux has 2 output channels and 1 control signal.
Demultiplexer’s operation is exactly opposite of Multiplexer.ĭetails, circuits diagrams, schematic designs, truth tables and application of different kind of MUXES are as follow. These output lines are known as channels. Each combination of control signal selects a specific output line through which the input data signal should flow out. It has 2 n output lines where “n” is the number of control signals. It is the reverse of Multiplexer.Ī Demultiplexer has a single input and multiple outputs. 74155 TTL 1 to 4/8 Demultiplexer with Pin ConfigurationsĪ digital device capable of forwarding its single input onto any one of the output lines is called Demultiplexer abbreviated for DEMUX.Demultiplexer IC with Pin Configuration.1 to 8 DeMux Using 1 to 4 DeMultiplexers.1 to 8 DeMux Schematic Diagram using Logic Gates.Implementation of 1 to 4 Demultiplexer Using 1 to 2 Demultiplexers.Schematic of 1 to 4 Demultiplexer using Logic Gates.Schematic Diagram of 1 to 2 Demultiplexer using Logic Gates.