74HC139 (Dual 2 to 4 Line Decoder)

Overview

Meet the 74HC139, a versatile dual 2-to-4 line decoder/demultiplexer IC from the high-speed CMOS 74HC series. This compact 16-pin chip packs two independent 2-to-4 decoders, each with active-low outputs and an active-low enable input. Whether you're demultiplexing signals, building address decoders for memory or I/O, or creating compact logic circuits, the 74HC139 delivers fast, low-power performance. With a wide supply voltage range from 2V to 6V, it's perfect for both battery-powered and standard logic projects. Available now at MOKWN Egypt, your trusted source for electronic components.

Key Features

• Dual 2-to-4 decoders: Two independent decoders in one package, saving space and cost.
• Active-low outputs: Ideal for interfacing with active-low logic or enabling signals.
• Active-low enable input: Provides easy expansion and cascading of multiple decoders.
• Wide supply voltage (2V to 6V): Compatible with 3.3V, 5V, and other logic levels.
• High-speed operation: Propagation delay as low as 25ns at 6V.
• Low power dissipation: 320mW maximum, suitable for power-sensitive designs.
• Broad temperature range: Operates from -40°C to +125°C, reliable in harsh environments.
• Standard 16-pin DIP package: Easy to use on breadboards and PCBs.

Technical Specifications

• No. of Pins: 16
• No. of Inputs: 3 × 3 (two decoders, each with 2 data inputs and 1 enable)
• Output Current: 5.2 mA at 6 V
• Power Dissipation: 320 mW
• Supply Voltage Range: 2V to 6V
• Propagation Delay Time: 145 ns at 2V / 25 ns at 6V
• Operating Temperature Range: -40°C to +125°C

Applications & Use Cases

• Address decoding for memory and I/O expansion in microcontroller projects.
• Demultiplexing serial data to multiple parallel outputs.
• Implementing logic functions like 3-to-8 decoders (by cascading two 74HC139s).
• Building digital circuits for robotics, automation, and embedded systems.
• Educational projects to teach digital logic and combinational circuits.
• Interfacing with sensors and displays that require select lines.

What's Included

• 1 × 74HC139 Dual 2-to-4 Line Decoder IC (16-pin DIP)

Compatibility

• Works with 3.3V and 5V logic systems.
• Compatible with Arduino, Raspberry Pi, ESP32, and other microcontrollers.
• Can be used on breadboards, PCBs, or with IC sockets.
• Cascadable with other 74HC series ICs to build larger decoders.

MOKWN Recommendation

The 74HC139 is a must-have for any digital electronics enthusiast. Its dual-decoder design offers flexibility and efficiency, making it ideal for space-constrained projects. At MOKWN, we recommend this IC for students, hobbyists, and professionals who need reliable, high-speed decoding. Stock up now and enhance your digital logic toolkit!