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HCT138 The SN74HCT138 is a 3-line to 8-line decoder/demultiplexer from Texas Instruments. It operates from 4.5V to 5.5V and offers a typical propagation delay of 17ns.
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HCT138

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
The SN74HCT138 is a 3-line to 8-line decoder/demultiplexer from Texas Instruments. It operates from 4.5V to 5.5V and offers a typical propagation delay of 17ns.
✓ Total Stock: 400 pcs
$ Price Range: $0.30

HCT138 Available from 1 distributor

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HCT138 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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Manufacturer Name
Mounting Type
Operating Temperature
Operating Voltage
Propagation Delay
Storage Temperature
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HCT138 Description

Short technical summary and product information.

The SN74HCT138 is a high-speed 3-line to 8-line decoder/demultiplexer designed for memory decoding and data routing applications. It operates over a voltage range of 4.5V to 5.5V, making it suitable for TTL-compatible systems.

 

Key electrical characteristics include a typical propagation delay of 17ns and an output drive capability of ±4mA at 5V. The device consumes low power, with a maximum supply current of 80µA and a low input current of 1µA max. It features three enable inputs for simplified cascading and data reception.

 

This decoder/demultiplexer is available in a 16-SOIC surface-mount package. Its design minimizes system decoding delays, making it ideal for high-performance memory systems and data transmission applications.

HCT138 Quick Information

Product Type: Decoder/Demultiplexer
Series: 74HCT
Canonical Name: SN74HCT138 3-Line to 8-Line Decoder/Demultiplexer
Subcategory: Signal Switches, Multiplexers, Decoders

HCT138 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

HCT138 Estimated Pricing

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1+ $0.30 $0.30

Estimated market price range - modelled values for guidance only, not live distributor offers.

HCT138 Features

  • Operates from 4.5V to 5.5V supply.
  • Provides ±4mA output drive at 5V.
  • Features a typical 17ns propagation delay.
  • Low power consumption of 80µA max.
  • Available in 16-SOIC package.

HCT138 Applications

  • Suitable for high-speed memory decoding systems.
  • Used in data routing and signal switching applications.
  • Ideal for digital systems requiring short propagation delays.
  • Applicable in high-performance memory and communication systems.
  • Designed for logic circuits with TTL-Voltage compatibility.

HCT138 FAQs

5 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the SN74HCT138?

The SN74HCT138 operates over a voltage range of 4.5 V to 5.5 V.

What is the typical propagation delay of the SN74HCT138?

The typical propagation delay for the SN74HCT138 is 17 ns.

What is the output drive current for the SN74HCT138?

The SN74HCT138 has an output drive of ±4 mA at 5 V.

What is the operating temperature range for the SN74HCT138?

The SN74HCT138 operates from -40°C to 125°C.

What package type is the SN74HCT138 available in?

The SN74HCT138 is available in a 16-SOIC package.

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