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

Discussion in 'General Electronics Chat' started by vin.lwh, May 19, 2008.

  1. vin.lwh

    Thread Starter Member

    Jan 29, 2007
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    0
    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!
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    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.
     
  3. vin.lwh

    Thread Starter Member

    Jan 29, 2007
    10
    0
    Thank You.
     
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