SN74AS157D

Overview

The SN74AS157D is a quadruple 2-input multiplexer/demultiplexer from Texas Instruments, designed for advanced digital circuit applications. It features a bandwidth of 125 MHz and operates within a supply voltage range of 4.5 V to 5.5 V. The device has a propagation delay of 7 ns and supports a maximum digital input leakage current of 5 uA. It is housed in a 16-SOIC package and functions as a high-performance logic IC suitable for demanding signal routing tasks.

Feature Summary

• High-speed data selection with 125 MHz bandwidth capability
• Quadruple configuration providing four independent 2-to-1 multiplexing channels
• Advanced Schottky (AS) technology ensures fast switching performance

Applications

• Advanced digital circuit signal routing
• High-speed data selector implementations
• Multiplexer/demultiplexer configurations in industrial systems

Procurement Notes

Verify the specific suffix 'D' indicates the 16-SOIC package variant when ordering. Confirm that the application requires the standard 5V logic level associated with the AS series. Ensure compatibility with the specified operating temperature range for the commercial grade device. Cross-reference the datasheet for exact pinout definitions relative to the SOIC footprint.

Selection Notes

Select this component when high-speed multiplexing is required over standard TTL speeds. The AS series offers superior performance compared to basic 74LS equivalents. Consider the 16-SOIC package constraints for PCB layout. Verify that the 5V supply requirement aligns with the system power architecture before integration.

Part Context

This part belongs to the SN74AS157 family of quadruple 2-line to 1-line data selectors. It is an advanced Schottky logic device manufactured by Texas Instruments. The D suffix specifically denotes the surface-mount SOIC package option. It serves as a high-performance alternative to slower logic families for critical timing applications.

Replacement Considerations

The SN74AS157DE4 is a verified equivalent part number offering identical functionality. Check for lead-free compliance requirements if transitioning between these variants. Ensure pin compatibility remains consistent across the substitution.