74138 3-to-8 Line Decoder / Demultiplexer IC DIP-16

Description

Description

The 74138 is a TTL logic integrated circuit designed to convert 3 binary input lines into 8 mutually exclusive active-low outputs. It performs one-of-eight decoding, where only one output is activated based on the input combination. The device includes three enable inputs (two active-low and one active-high), allowing flexible control and easy cascading for larger decoding systems. Operating on a standard 5V TTL supply, the 74138 is widely used in address decoding, memory selection, signal routing, and digital control applications.

Features

• 3-to-8 line decoder architecture
• One-of-eight output decoding
• Active-low output configuration
• Three enable inputs for flexible control
• Supports cascading for larger decoder systems
• Standard TTL logic compatibility
• Single 5V supply operation
• Fast switching performance
• Suitable for memory and address decoding
• Can function as a demultiplexer
• Reliable digital logic operation
• DIP-16 through-hole package
• Breadboard-friendly design
• Easy PCB integration

Specifications

• Model: 74138

• Device Type: 3-Line to 8-Line Decoder / Demultiplexer IC

• Logic Family: TTL

• Input Lines: 3

• Output Lines: 8 (Active-Low)

• Enable Inputs: 3 (2 Active-Low, 1 Active-High)

• Supply Voltage: 5V

• Propagation Delay (Typical): 15ns

• Maximum Output Sink Current: 16mA

• Power Consumption (Typical): 75mW

• Package Type: 16-Pin DIP

• Mounting Type: Through-Hole

• Operating Temperature Range: 0C to +70C

• Application Type: Address Decoding and Signal Routing

Links

• 3D Model
• Datasheet

Tutorials

• Decoder: 3:8 74138 Decoder IC