HD74HC138 - 3-to-8-line Decoder/Demultiplexer

Product Overview

Hitachi Semiconductor

Part number	HD74HC138
Manufacturer	Hitachi Semiconductor
File Size	51.06 KB
Description	3-to-8-line Decoder/Demultiplexer
Datasheet	HD74HC138 Datasheet
Additional preview pages of the HD74HC138 datasheet.

The HD74HC138 has 3 binary select inputs (A, B and C).

If the device is enabled these inputs determine which one of the eight normally high outputs will go low.

Two active low and one active high enables (G1, G2A and G2B) are provided to ease the cascading of decoders.

High Speed Operation: tpd (A, B, C to Y) = 16.5 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 V to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Inputs Enable G1 X X L H H H H H H H H G2A X H X L L L L L L L L G2B H X X L L L L L L L L Select C X X X L L L L H H H H B X X X L L H H L L H H A X X X L H L H L H L H Outputs Y0 H H.

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Published: Mar 23, 2005 |