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SN74AHC138N Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
SN74AHC138NTI171Yes

SN74AHC138N is a 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments (TI).

The SN74AHC138N is a 3-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 Range: 2 V to 5.5 V
  • High Noise Immunity: CMOS technology
  • Low Power Consumption: Typical ICC of 1 µA
  • Operating Temperature Range: -40°C to +85°C
  • Package Type: PDIP-16 (Plastic Dual In-Line Package)
  • Propagation Delay: Typically 7.5 ns at 5 V
  • Output Drive Capability: ±8 mA at 5 V

Descriptions:

The SN74AHC138N decodes three binary address inputs (A0, A1, A2) into one of eight mutually exclusive outputs (Y0-Y7). It features three enable inputs (two active-low and one active-high) to simplify cascading and reduce the need for external gates.

Features:

  • 3-to-8 Line Decoding: Converts 3-bit input into 8 active-low outputs.
  • Multiple Enable Inputs: Two active-low (G1, G2A, G2B) and one active-high (G1) for easy expansion.
  • Wide Operating Voltage: Supports 2 V to 5.5 V operation.
  • Balanced Propagation Delays: Ensures stable performance.
  • Low Power Consumption: Suitable for battery-operated applications.
  • High Noise Immunity: CMOS design reduces susceptibility to noise.
  • Latch-Up Performance Exceeds 250 mA: Per JESD 17.

This device is commonly used in memory addressing, data routing, and logic function generation.

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