The DM74LS253 is a dual 4-input multiplexer with 3-state outputs from Fairchild Semiconductor (now ON Semiconductor). This device selects one of four data sources from each multiplexer based on the select inputs and outputs the selected data. The 3-state outputs allow for easy expansion and connection to common bus systems.

Applications

• Data selection: Choosing one of multiple data inputs for processing.
• Logic function generation: Implementing custom logic functions by selecting appropriate data inputs.
• Parallel-to-serial conversion: Converting parallel data to serial data.
• Address decoding: Selecting memory locations or peripherals based on address inputs.
• Digital instrumentation: Used in test equipment and measurement systems for signal routing and selection.

Features

• Dual 4-input multiplexers: Contains two independent 4-input multiplexers in a single package.
• 3-state outputs: Allows for connection to common bus systems without loading the bus.
• Low power consumption: Utilizes Low-Power Schottky technology for reduced power consumption.
• High speed: Offers relatively fast switching speeds for general-purpose applications.
• Enable input: Allows for disabling the outputs of the multiplexer.

Benefits

• Reduced component count: Integrates two multiplexers into one package, reducing board space and cost.
• Simplified system design: 3-state outputs simplify connection to common bus systems.
• Improved system performance: Low power consumption reduces heat generation and improves overall system reliability.
• Increased flexibility: Enable input allows for easy control of the multiplexer's outputs.
• Versatile functionality: Can be used in a wide variety of applications requiring data selection and routing.

Additional Details

The DM74LS253 operates from a single 5V power supply. It is available in various packages, including DIP (Dual In-line Package) and SOIC (Small Outline Integrated Circuit). The select inputs determine which of the four data inputs is routed to the output. The enable input, when high, disables the outputs, placing them in a high-impedance state. The low-power Schottky technology ensures efficient operation and minimizes power consumption, making it a suitable choice for battery-powered or energy-sensitive applications.