Learning objectives To understand Multiplexers and Demultiplexers and

Learning objectives: ● To understand Multiplexers and Demultiplexers and its logic circuits ● To learn construction and working of digital circuits ● To realise the applications of data processing circuits

Learning outcomes: Students will be able to ● demonstrate knowledge about multiplexers and demultiplexers and its logic circuits ● to develop skill to build digital circuits and verify with truth tables. ● to draw the block diagrams and logic electronic circuits for multiplexers, demultiplexers and comparator

Prerequisites: ● ● Students required previous knowledge on Binary number system Logic gates NOT, OR, AND , NOR, NAND, XOR gates Their logic circuits and truth tables

DATA PROCESSING CIRCUITS ● Combinational Circuits - These logic circuits output is depends only on the instantaneous inputs ● Multiplexers, De-multiplexers, Encoders, Decoders are the examples ● Sequential Circuits - These logic circuits output is depends on the all the sequence of the present inputs and previous input stored in the memory ● Flip-Flops, Latches, Counters are the examples

MULTIPLEXERS ● A Multiplexer is a combinational circuit ● Multiplexer means one to many ● A Multiplexer selects one binary information from one of many inputs lines and directs to single output line ● A Multiplexer routes (connects) the selected data input to the output ● The selection of one input from many inputs is done by select inputs ● A Multiplexer is also called data selector

MULTIPLEXERS ● A Multiplexer has - N data inputs - m select inputs - 1 output

2: 1 MULTIPLEXER Block diagram

2: 1 MULTIPLEXER Logical expression Truth table Select input A Output Z 0 0 x 0 0 1 x 1 1

4: 1 MULTIPLEXER Logic circuit diagram

4: 1 MULTIPLEXER Logical expression Select inputs Output B A Z 0 0 I₀ 0 1 I₁ 1 0 I₂ 1 1 I₃

DEMULTIPLEXERS ● Demultiplexer is a combinational circuit ● A Multiplexer routes (connects) the data input to the selected output of many. ● The selection of one output from many outputs is done by select inputs ● Demultiplexer is also called data distributor

DEMULTIPLEXERS Demultiplexer has - 1 input - m select inputs - N outputs Block diagram

1: 2 DEMULTIPLEXERS Block diagram Logic circuit diagram

1: 2 DEMULTIPLEXERS Logical expression Truth table I A 0 X 0 0 1 1 1 1 0

1: 4 DEMULTIPLEXERS Logic circuit diagram →

1: 4 DEMULTIPLEXERS Logical expression Truth Table→ Input Select Inputs Outputs I B A 0 X X 0 0 1 0 1 0 0 1 1 0 0 0 1

Thank you