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SN54HCT138J Datasheet 3-line To 8-line Decoders/demultiplexers

Manufacturer: Texas Instruments

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

This datasheet includes multiple variants, all published together in a single manufacturer document.

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.

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
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