SN74AS157DR

Overview

The SN74AS157DR is a quadruple 1-of-2 data selector/multiplexer from Texas Instruments, belonging to the AS logic series. It features four independent multiplexers in a 16-SOIC surface-mount package. The device operates with a supply voltage range of 4.5 V to 5.5 V and supports a maximum propagation delay of 5.5 ns. It functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates four independent 2-to-1 multiplexers for parallel data routing
• Utilizes Advanced Schottky (AS) technology for high-speed switching performance
• Provides compatible pinout with standard 74-series logic families

Applications

• High-speed digital data routing systems
• Parallel-to-serial conversion circuits
• Address decoding and selection logic

Procurement Notes

Verify the specific suffix 'DR' confirms the 16-SOIC tape-and-reel packaging configuration. Ensure the AS logic family specifications align with system speed requirements. Confirm RoHS compliance status through official manufacturer documentation prior to integration.

Selection Notes

Select this component when high-speed operation is critical compared to standard ALS or HC families. The AS series offers faster propagation delays suitable for demanding timing constraints. Verify that the 4.5V to 5.5V supply voltage range matches the target power infrastructure.

Part Context

This part belongs to the SN74AS157 family of quadruple multiplexers. It serves as a high-performance alternative to slower logic families, designed for applications requiring rapid signal switching. The DR suffix indicates surface-mount availability in reel packaging for automated assembly processes.

Replacement Considerations

SN74ALS157ADR is a documented substitute offering similar functionality with slightly different electrical characteristics.