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SN74ALS138AN Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
SN74ALS138ANTI395Yes

SN74ALS138AN is a 3-line to 8-line decoder/demultiplexer manufactured by Texas Instruments (TI).

The SN74ALS138AN is a 3-line to 8-line decoder/demultiplexer manufactured by Texas Instruments (TI).

Specifications:

  • Logic Type: Decoder/Demultiplexer
  • Number of Input Lines: 3
  • Number of Output Lines: 8 (active-low)
  • Supply Voltage (VCC): 4.5V to 5.5V
  • Operating Temperature Range: 0°C to 70°C
  • Propagation Delay (Max): 15 ns
  • Power Dissipation (Max): 75 mW
  • Package Type: PDIP (Plastic Dual-In-Line Package)
  • Pin Count: 16

Descriptions:

The SN74ALS138AN decodes three binary address inputs (A0, A1, A2) into one of eight mutually exclusive outputs (Y0-Y7). It features three enable inputs (G1, G2A, G2B) that must be in the correct state (G1 high, G2A and G2B low) for the device to function.

Features:

  • Active-Low Outputs: Outputs are low when selected.
  • Multiple Enable Inputs: Allows for easy expansion to larger decoders.
  • High-Speed Operation: Optimized for performance in TTL systems.
  • Low Power Consumption: Suitable for battery-operated devices.
  • Wide Operating Voltage Range: Compatible with standard 5V logic systems.

This device is commonly used in memory decoding, data routing, and other digital logic applications.

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