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74HC138A Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
74HC138AON/TOS520Yes

74HC138A** is a high-speed CMOS decoder/demultiplexer manufactured by **ON Semiconductor (ON)** and **Toshiba (TOS)**.

The 74HC138A is a high-speed CMOS decoder/demultiplexer manufactured by ON Semiconductor (ON) and Toshiba (TOS).

Specifications:

  • Logic Type: 3-to-8 Line Decoder/Demultiplexer
  • Supply Voltage Range (VCC): 2.0V to 6.0V
  • High Noise Immunity: CMOS technology
  • Low Power Consumption: Typically 4µA at 5V
  • Output Current: ±5.2mA at VCC = 4.5V
  • Propagation Delay: 15ns (typical) at VCC = 5V
  • Operating Temperature Range: -40°C to +125°C
  • Package Options: SOIC, TSSOP, PDIP

Descriptions:

The 74HC138A decodes three binary address inputs (A0, A1, A2) into one of eight mutually exclusive outputs (Y0-Y7). It features three enable inputs (E1, E2, E3) for cascading and control.

Features:

  • 3-to-8 Line Decoding: Converts 3-bit input to 8 active-low outputs.
  • Demultiplexing Capability: Can function as a 1-to-8 demultiplexer.
  • Multiple Enable Inputs: Allows easy expansion for larger decoders.
  • Wide Operating Voltage: Compatible with TTL and CMOS levels.
  • High-Speed Operation: Suitable for high-performance digital systems.

This device is commonly used in memory decoding, data routing, and address selection in digital circuits.

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