74LS139 Dual 2-to-4 Decoder – DIP-16

The 74139 is a TTL logic integrated circuit that contains two independent 2-to-4 line decoders/demultiplexers in a single package. Each decoder accepts 2 binary input lines and activates one of four active-low outputs based on the input combination. With independent enable inputs, each decoder section can be controlled separately, making the 74139 ideal for address decoding, memory selection, signal routing, and digital control applications. Operating on a standard 5V TTL supply, it is widely used in embedded systems, microprocessor interfaces, and digital electronics projects.

Features

- Dual 2-to-4 decoder architecture

- Two independent decoder/demultiplexer sections

- Active-low output configuration

- Independent enable inputs for each section

- Standard TTL logic compatibility

- Single 5V supply operation

- Fast switching performance

- Suitable for address decoding

- Useful for signal routing and demultiplexing

- Reliable digital logic operation

- DIP-16 through-hole package

- Breadboard-friendly design

- Easy PCB integration

- Ideal for digital control systems

Specifications

Model: 74139

Device Type: Dual 2-to-4 Line Decoder / Demultiplexer IC

Logic Family: TTL

Number of Decoders: 2

Inputs per Decoder: 2

Outputs per Decoder: 4 (Active-Low)

Enable Inputs: 2 (Independent)

Supply Voltage: 5V

Propagation Delay (Typical): 15ns

Maximum Output Sink Current: 16mA

Power Consumption (Typical): 50mW

Package Type: 16-Pin DIP

Mounting Type: Through-Hole

Operating Temperature Range: 0°C to +70°C

Application Type: Address Decoding and Signal Routing

Links

- 3D Model

- Datasheet

Tutorials

DECODER: 74139 IC 2:4 Decoder