SN74HC138N - 3-Line To 8-Line Decoders/Demultiplexers 16 PDIP

Product Description

The SN74HC138N is a high-speed CMOS logic IC designed to function as a 3-to-8 line decoder or demultiplexer. It is an essential component in digital systems for address decoding, signal routing, and data selection. With its robust performance, low power consumption, and TTL-compatible inputs, this IC is ideal for a wide range of applications in embedded systems, control systems, and digital logic design.

Key Features

• 3-to-8 Line Decoder: Converts 3 binary inputs into 8 unique outputs, enabling efficient signal selection and decoding.
• Demultiplexing Capability: Allows one input signal to be routed to one of 8 outputs.
• High-Speed CMOS Technology: Provides faster switching speeds compared to standard logic families.
• Wide Voltage Range: Operates from 2V to 6V, suitable for diverse systems.
• Low Power Consumption: Energy-efficient design, ideal for battery-powered devices.
• TTL-Compatible Inputs: Fully compatible with TTL logic levels for seamless integration into mixed-logic environments.
• Active Low Outputs: Outputs are low when selected, making it suitable for a wide range of logic applications.
• Standard 16-Pin DIP Package: Easy to integrate into prototyping and circuit designs.

Applications

• Address Decoding: Ideal for memory and peripheral address decoding in microcontroller-based systems.
• Signal Routing: Directs input signals to one of eight outputs in control and communication systems.
• Data Selection: Used for multiplexing and demultiplexing in digital circuits.
• Control Systems: Enables signal activation for specific devices or functions.
• Timing Circuits: Useful in clock and timing signal generation.
• Educational Electronics: Ideal for learning and teaching digital logic concepts.

Technical Specifications

• Logic Function: 3-to-8 line decoder/demultiplexer
• Inputs: 3 binary inputs (A, B, C), 3 enable inputs (G1, G2A, G2B)
• Outputs: 8 active low outputs (Y0-Y7)
• Propagation Delay: 17 ns (typical at 4.5V)
• Operating Voltage Range: 2V to 6V
• Output Drive Capability: ±5.2 mA
• Package Type: 16-pin Dual-Inline Package (DIP)

Logic Truth Table

Advantages

• Simplifies address decoding in microcontroller applications.
• Reduces circuit complexity by integrating multiple decoding functions.
• Compatible with a wide range of digital logic families.

The SN74HC138N is a versatile and reliable IC, providing efficient signal selection and address decoding for a variety of industrial, educational, and hobbyist applications.