SN74HCS157QPWRQ1

Overview

The SN74HCS157QPWRQ1 is an automotive-grade quadruple 2-to-1 multiplexer from Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an ambient temperature range of -40°C to +125°C. The device features Schmitt-trigger inputs for noise rejection and balanced CMOS push-pull outputs capable of ±7.8-mA drive at 6 V. It is qualified under AEC-Q100 standards with HBM ESD Level 2 and CDM Level C6 ratings.

Feature Summary

• Schmitt-trigger inputs provide tolerance for slow or noisy input signals
• Balanced CMOS push-pull outputs ensure similar sourcing and sinking current capabilities
• Low power consumption with typical supply current of 100 nA
• Available in packages featuring wettable flanks for improved solder joint inspection

Applications

• Data selection
• Multiplexing

Procurement Notes

Verify the specific package variant (TSSOP, SOIC, or WQFN) required for the design, as the base part number covers multiple physical configurations. Confirm that the selected package includes wettable flanks if automatic optical inspection compatibility is necessary. Ensure the design accounts for the specified thermal resistance values associated with the chosen footprint.

Selection Notes

Select this component when high-speed data routing in automotive environments is required. The wide operating voltage range accommodates various system power rails. The inclusion of Schmitt triggers makes it suitable for applications with signal integrity challenges or slow transition times. Verify that the output drive requirements do not exceed the absolute maximum ratings to prevent device damage.

Part Context

This device belongs to the SN74HCS157-Q1 family of automotive logic ICs. It functions as a high-speed silicon gate CMOS multiplexer designed for robust performance in demanding conditions. The product line emphasizes low power consumption and noise immunity through its specific input architecture.

Replacement Considerations

Non-automotive equivalents such as the SN74HCS157PW may be considered if AEC-Q100 qualification is not required. Standard commercial grade parts lack the extended temperature and reliability specifications mandated for automotive systems.