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Digital ElectronicsMultiplexers & Demultiplexers

A 1-to-8 demultiplexer requires how many select lines to route one data input to one of eight outputs?

  • A2
  • B3
  • C4
  • D8
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Correct Answer: B. 3
Explanation: Eight destinations require log2(8)=3 binary select inputs.
Reference: Standard digital electronics: demultiplexer selection
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