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SN74HCT138 - 3-Line to 8-Line Decoders/Demultiplexers

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.

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.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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SN54HCT138, SN74HCT138 SCLS171F – MARCH 1984 – REVISED MARCH 2022 SNx4HCT138 3-Line to 8-Line Decoders/Demultiplexers 1 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 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.