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74ACT139

Hitachi Semiconductor
Part Number 74ACT139
Manufacturer Hitachi Semiconductor
Description Dual 1-of-4 Decoder/Demultiplexer
Published Apr 3, 2005
Detailed Description Data sheet acquired from Harris Semiconductor SCHS235 CD74AC139, CD74ACT139 Dual 2-to-4-Line Decoder/Demultiplexer Desc...
Datasheet PDF File 74ACT139 PDF File

74ACT139
74ACT139

Overview
Data sheet acquired from Harris Semiconductor SCHS235 CD74AC139, CD74ACT139 Dual 2-to-4-Line Decoder/Demultiplexer Description The CD74AC139 and CD74ACT139 are dual 2-to-4-line decoders/demultiplexers that utilize the Harris Advanced CMOS Logic technology.
These devices contain two independent binary to one-of-four decoders, each with a single active LOW enable input (1E or 2E).
Data on the select inputs (1A0 and 1A1 or 2A0 and 2A1) cause one of the four normally HIGH outputs to go LOW.
If the enable input is HIGH, all four outputs remain HIGH.
For demultiplexer operation, the enable input is the data input.
The enable input also functions as a chip select when these devices are cascaded.
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