The SN74153 (74153) is a TTL dual 4-input multiplexer (MUX) IC containing two independent 4-to-1 multiplexers in a single package.

Each multiplexer has four data inputs and one output, while both multiplexers share two common selection inputs. The selection inputs determine which of the four data inputs is connected to the corresponding output.

The SN74153 is widely used in digital logic circuits, data selection, signal routing, control systems, communication circuits, and educational electronics projects.

Key Features

• Dual 4-to-1 multiplexer
• Two independent multiplexer channels
• 4 data inputs per multiplexer
• 2 common selection inputs
• Individual enable/strobe input for each multiplexer
• TTL digital logic
• High-speed data selection
• Allows one of four inputs to be routed to a single output
• Suitable for digital signal switching
• DIP package for easy breadboard use
• Ideal for digital electronics education and prototyping

How It Works

A multiplexer, commonly called a MUX, is a combinational digital circuit that selects one of several input signals and sends the selected signal to a single output.

The SN74153 contains two 4-to-1 multiplexers.

Each section provides:

• 4 × Data Inputs
• 1 × Output
• 1 × Enable/Strobe Input

The two multiplexers share:

• 2 × Selection Inputs

The state of the two selection inputs determines which data input is transferred to the output.

Input Selection

With two selection lines, four different input combinations are possible:

This allows the circuit to electronically select between four different digital signals using only two control lines.

Dual Multiplexer Design

Because the SN74153 contains two multiplexers in one IC, two separate groups of four signals can be controlled simultaneously using the same selection lines.

Each multiplexer has its own enable/strobe control, allowing the two sections to be independently enabled or disabled.

This makes the IC useful for applications requiring synchronized selection of multiple digital signals.

Applications

The SN74153 can be used for:

• Digital signal selection
• Data routing
• Logic switching
• Communication circuits
• Digital control systems
• Data acquisition systems
• Parallel-to-serial data selection
• Logic function generation
• Microprocessor systems
• Computer architecture experiments
• Educational electronics
• Breadboard experiments
• TTL logic projects

Technical Specifications

Part Number: SN74153 / 74153
Function: Dual 4-Input Multiplexer
Multiplexer Type: 4-to-1
Number of Multiplexers: 2
Data Inputs: 4 per multiplexer
Selection Inputs: 2 shared selection lines
Enable/Strobe: Individual control for each multiplexer
Logic Family: TTL
Typical Supply Voltage: 5V
Package: DIP
Application: Digital Logic, Data Selection & Signal Routing

Ideal for Learning

The SN74153 is an excellent IC for learning important digital electronics concepts, including:

• Multiplexers
• Data selection
• Binary control
• Combinational logic
• Digital signal routing
• Truth tables
• Logic circuit design
• TTL electronics

Its dual 4-to-1 architecture makes the SN74153 a useful component for both educational experiments and practical digital logic applications.