Switching-network type logic blocks

Multiplexer: Routes one of many inputs to a single output
- Also called a selector

Demultiplexer: Routes a single input to one of many outputs
- Also called a decoder

multiplexer

demultiplexer

control

These devices can be

constructed from:

(1) logic gates

(2) networks of tran-

sistors configured

as switches

Multiplexer: Routes one of many inputs to a single output