SN74AS253AN

Overview

The SN74AS253AN is a dual 4-to-1 multiplexer from the Texas Instruments AS logic series, housed in a 16-pin PDIP package. It operates on a single 5V supply with a voltage range of 4.5V to 5.5V. The device features TTL-compatible inputs and outputs, providing high-speed data routing with a propagation delay of 10ns at 5V and 50pF load. It supports a maximum clock frequency of 100MHz and includes active-low enable functionality for controlled signal transmission within commercial temperature ranges.

Feature Summary

• Dual independent 4-to-1 multiplexing architecture
• TTL-compatible input and output interfaces
• High-speed data routing capability
• Active-low enable control

Applications

• Data routing in digital systems
• Signal selection circuits
• Multiplexed data buses
• Logic interface modules

Procurement Notes

Verify the specific manufacturer part number against official Texas Instruments documentation to confirm pinout compatibility and electrical specifications. Ensure the component meets required operating temperature ranges and logic family standards before integration into final designs.

Selection Notes

Select this component when dual independent 4-to-1 multiplexing is required with TTL compatibility. Consider the AS series speed characteristics and PDIP packaging constraints relative to available board space and thermal requirements for the target application environment.

Part Context

This component belongs to the SN74ASxxA logic family, known for advanced Schottky technology offering higher speed than standard LS or ALS counterparts. The SN74AS253 specifically provides dual multiplexer functionality within this high-performance series, suitable for demanding digital logic applications requiring fast switching times.

Replacement Considerations

Compatible substitutes include the SN74ALS253N for lower power consumption variants. Verify pinout and electrical parameters against original specifications when considering alternative manufacturers or updated logic families.