A demux is a digital switch that takes a single input signal and distributes it to multiple outputs based on select lines. It has one input and multiple outputs, with the select lines determining which output the input is routed to. Common demux configurations include 1-to-2, 1-to-4, 1-to-8, and 1-to-16 depending on the number of select lines. A typical application is routing a single data source like a laser printer to multiple destinations like a fax machine, inkjet printer, or plotter.

1. DEMULTIPLEXER

2. WHAT IS DEMULTIPLEXER?
A DEMUX is a digital switch with a single input
(source) and a multiple outputs (destinations).
The select lines determine which output the input is
connected to.

3. DEMULTIPLEXER
BLOCK DIAGRAM
1 2N
DEMUX
Input Outputs
(source) (destinations)
N
Select
Lines

4. DEMUX TYPES
 1-to-2 (1 select line)
 1-to-4 (2 select lines)
 1-to-8 (3 select lines)
 1-to-16 (4 select lines)

5. 1-to-2 DEMULTIPLEXER

6. TYPICAL APPLICATION OF A DEMUX
Multiple Destinations
Single Source Selector
B/W Laser
Printer
Fax
Machine
D0
DEMUX
X D1
D2 Color Inkjet
Printer
D3
B A Selected Destination
0 0 B/W Laser Printer Pen
Plotter
0 1 Fax Machine
1 0 Color Inkjet Printer
1 1 Pen Plotter
6