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CD74HCT138E - High-Speed CMOS Logic 3 to 8-Line Decoder/Demultiplexer Inverting/Noninverting

Download the CD74HCT138E datasheet PDF. This datasheet also includes the CD74HC138 variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (CD74HC138-etcTI.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number CD74HCT138E
Manufacturer Texas Instruments
File Size 1.28 MB
Description High-Speed CMOS Logic 3 to 8-Line Decoder/Demultiplexer Inverting/Noninverting
Datasheet download datasheet CD74HCT138E Datasheet

General Description

The CDx4HC(T)138 and '238 are three to eight decoders with one standard output strobe (G2) and two active low output strobes (G 1 and G 0).

When the outputs are gated by any of the strobe inputs, they are all forced into the high state.

When the outputs are not disabled by the strobe inputs, only the selected output is low while all others are high.

Overview

CD54HC138, CD74HC138, CD54HCT138, CD74HCT138, CD54HC238, CD74HC238, CD54HCT238, CD74HCT238 SCHS147J – NOVEMBER 1998 – REVISED NOVEMBER 2021 CDx4HC138, CDx4HCT138, CDx4HC238, CDx4HCT238 High-Speed CMOS Logic 3- to 8-Line.

Key Features

  • Select one of eight data outputs:.
  • Active low for '138.
  • Active high for '238.
  • l/O port or memory selector.
  • Three enable inputs to simplify cascading.
  • Typical propagation delay of 13 ns at VCC = 5 V, CL = 15 pF, TA = 25°C.
  • Fanout (over temperature range).
  • Bus driver outputs: 15 LSTTL loads.
  • Standard outputs: 10 LSTTL loads.
  • Wide operating temp range: -55°C to 125°C.
  • Balanced propagation delay and t.

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