SN74HCS373QWRKSRQ1

Overview

The SN74HCS373QWRKSRQ1 is an automotive-grade octal transparent D-type latch with Schmitt-trigger inputs and three-state outputs. It operates within a supply voltage range of 2 V to 6 V and supports an ambient temperature range from -40°C to +125°C. The device features balanced CMOS outputs capable of ±7.8 mA drive current at 6 V, low power consumption with typical ICC of 100 nA, and input leakage current of ±100 nA. It includes AEC-Q100 qualification with HBM ESD Level 2 and CDM Level C6 ratings.

Feature Summary

• Schmitt-trigger inputs provide high noise rejection and tolerance for slow or noisy signals
• Balanced CMOS three-state outputs allow active driving and high-impedance states
• Wettable flank QFN package facilitates reliable soldering and automatic optical inspection

Applications

• Parallel data storage
• Digital bus buffer

Procurement Notes

Verify the specific ordering suffix matches the required package type and reel quantity. Confirm that the component meets AEC-Q100 requirements for your target automotive application. Ensure proper handling procedures are followed due to electrostatic discharge sensitivity levels defined in the datasheet specifications.

Selection Notes

Select this component when designing systems requiring robust noise immunity for digital signal latching. The wide operating voltage range allows compatibility with various logic families. Consider the thermal resistance characteristics if multiple devices are placed closely on the PCB layout.

Part Context

This part belongs to the SN74HCS373-Q1 family of automotive logic devices. It shares functional similarities with other octal latches but distinguishes itself through integrated Schmitt-trigger architecture and specialized wettable flank packaging designed for enhanced reliability in automotive environments.

Replacement Considerations

Direct replacements include SN74HCS373PW-Q1 for TSSOP packages. Verify pinout compatibility and electrical characteristics before substituting with non-TI equivalents.

FAQ

How do Schmitt-trigger inputs benefit this latch?

They provide hysteresis that makes the device tolerant to slow or noisy input signals, preventing false triggering.

What happens to the output state during startup?

If the latch enable (LE) input is held low during startup, the output state of all channels remains unknown until LE is driven high with valid input signals.