Dual 1-of-4 Decoder/DemultiplexerThe SL74HC139 is identical in pinout to the LS/ALS139. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
This device consists of two independent 1-of-4 decoders, each of
which decodes a two-bit Address to one-of-four active-low outputs.
Active-low Selects are provided to facilitate the demultiplexing and
cascading functions. The demultiplexing function is accomplished by
using the Address inputs to select the desired device output, and
utilizing the Select as a data input. By System Logic Semiconductor. co.
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SL74HC139 Pb-Free | SL74HC139 Cross Reference | SL74HC139 Schematic | SL74HC139 Distributor |
SL74HC139 Application Notes | SL74HC139 RoHS | SL74HC139 Circuits | SL74HC139 footprint |