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74HC139 CD74HC139E Dual 1-of-4 Decoder/Demultiplexer

  • The 74HC139; 74HCT139 decodes two binary weighted address inputs (nA0, nA1) to four mutually exclusive outputs (nY0 to nY3).
  • Each decoder features an enable input (nE).
  • When nE is HIGH all outputs are forced HIGH.
  • The enable input can be used as the data input for a 1-to-4 demultiplexer application.
  • Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

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