SN74HCS157PWR

Overview

The SN74HCS157PWR is a quadruple 2-to-1 multiplexer from the HCS logic series, housed in a 16-pin TSSOP package. 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. Propagation delay ranges from 7 ns to 57 ns depending on voltage and temperature.

Feature Summary

• Schmitt-trigger inputs provide high noise immunity and tolerance for slow input transitions
• Balanced CMOS push-pull outputs ensure similar sourcing and sinking current capabilities
• Low power consumption with typical supply current of 100 nA

Applications

• Data selection
• Multiplexing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official orderable addendum to confirm packaging quantity and material finish. Ensure the selected variant matches the required thermal resistance and moisture sensitivity level for the intended assembly process. Cross-reference the active status and RoHS compliance details directly with the latest datasheet revision history.

Selection Notes

Select this component when noisy environments require Schmitt-trigger input hysteresis or when wide voltage operation between 2 V and 6 V is necessary. The extended temperature range up to +125°C suits industrial applications. Verify that the output drive current requirements do not exceed the specified limits for the chosen supply voltage to prevent damage.

Part Context

This part belongs to the SN74HCS157 family of quadruple 2-to-1 multiplexers. It shares functional architecture with other devices in the series but is distinguished by its specific HCS logic characteristics, including Schmitt-trigger inputs and extended temperature ratings. The PW suffix denotes the TSSOP-16 physical package configuration.

Replacement Considerations

SN74HCS157DR (SOIC-16 package)

FAQ

How does the Schmitt-trigger input architecture benefit signal integrity?

The Schmitt-trigger inputs provide hysteresis, making the device extremely tolerant to slow or noisy input signals compared to standard CMOS inputs.

What is the function of the strobe (G) input?

A high level at the strobe terminal forces all Y outputs low, regardless of the state of the address select or data inputs.