Datasheet4U Logo Datasheet4U.com

SN74HCT138D - 3-Line to 8-Line Decoders/Demultiplexers

Download the SN74HCT138D datasheet PDF. This datasheet also covers the SN74HCT138 variant, as both devices belong to the same 3-line to 8-line decoders/demultiplexers family and are provided as variant models within a single manufacturer datasheet.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (SN74HCT138-etcTI.pdf) that lists specifications for multiple related part numbers.

General Description

The ’HCT138 devices are designed for highperformance memory-decoding or data-routing applications requiring very short propagation delay times.

In high-performance memory systems, these decoders can minimize the effects of system decoding.

When employed with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory usually are less than the typical access time of the memory.

Overview

SN54HCT138, SN74HCT138 SCLS171F – MARCH 1984 – REVISED MARCH 2022 SNx4HCT138 3-Line to 8-Line Decoders/Demultiplexers.

Key Features

  • Operating voltage range of 4.5 V to 5.5 V.
  • Outputs can drive up to 10 LSTTL loads.
  • Low power consumption, 80-µA max ICC.
  • Typical tpd = 17 ns.
  • ±4-mA output drive at 5 V.
  • Low input current of 1 µA max.
  • Inputs are TTL-Voltage compatible.
  • Designed specifically for high-speed memory decoders and data transmission systems.
  • Incorporate three enable inputs to simplify cascading and/or data reception 2.

More Datasheets from Texas Instruments

Part Number Description
SN74HCT138 3-Line to 8-Line Decoders/Demultiplexers
SN74HCT138N 3-Line to 8-Line Decoders/Demultiplexers
SN74HCT139 Dual 2-Line To 4-Line Decoders/Demultiplexers
SN74HCT125 Quadruple Bus Buffer Gates
SN74HCT125D Quadruple Bus Buffer Gates
SN74HCT125N Quadruple Bus Buffer Gates
SN74HCT14 Hex Schmitt-Trigger Inverter
SN74HCT14-Q1 Hex Schmitt-Trigger Inverter
SN74HCT157 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXER
SN74HCT157N QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXER