Demultiplexers

• 1 data input; n control inputs (called “selects”); 2n outputs

• Device connects one of the 2n outputs to the input

  • “Selects” decide which output is connected to the input
  • When used as a decoder, the input is called an “enable” (G)

0 Out01 Out12 Out2 3 Out34 Out45 Out56 Out67 Out7

S2

3:8

Demux

S1

S0

In or "G"

Typically used to select

(“enable”) banks of memory

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