What's the difference between a decoder and a demultiplexer?

Thread Starter

vin.lwh

Joined Jan 29, 2007
10
Hey guys,
I was just wondering, i find the function of both the decoder and the demultiplexer the same. Can anyone tell me the difference? Thanks lot!
 

Wendy

Joined Mar 24, 2008
22,164
A decoder generally takes a binary number and tranlates it into a specific output. 3 pins are decoded into 1 of 8 pins going high. This is fundimental to a multiplexer, but only in that it is part of a multiplexer. A multiplexer takes a signal and uses the binary number to switch it to one of 8 pins. In the case of an switching analog multiplexer it is bidirectional, think in terms of a rotary switch.
 
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