SN74HCS373QPWRQ1

Overview

The SN74HCS373QPWRQ1 is an automotive-grade octal transparent D-type latch featuring 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 includes balanced CMOS outputs capable of ±7.8 mA drive current at 6 V, with typical supply current of 100 nA and input leakage of ±100 nA. Propagation delay ranges from 9.6 ns to 33 ns depending on voltage.

Feature Summary

• Schmitt-trigger architecture provides noise rejection for slow or noisy input signals
• Balanced three-state outputs allow high-impedance control without affecting stored data
• AEC-Q100 qualified for automotive environments with robust ESD protection

Applications

• Parallel data storage
• Digital bus buffer

Procurement Notes

Verify the specific package suffix matches the required footprint, as the Q1 series offers multiple options including TSSOP and VQFN. Confirm that the ordering suffix corresponds to the desired reel size and tape configuration. Ensure the component meets AEC-Q100 Grade 1 requirements for your specific thermal and reliability standards before finalizing procurement.

Selection Notes

Select this component when designing systems requiring wide voltage operation up to 6 V and high noise immunity via Schmitt triggers. It is suitable for automotive applications demanding AEC-Q100 qualification. Consider the TSSOP package for standard surface mount needs or VQFN if wettable flanks are required for enhanced inspection reliability.

Part Context

This part belongs to the SN74HCS373-Q1 family of automotive octal transparent D-type latches. It shares functional characteristics with other members of the HCS logic series, which are designed for high-speed CMOS performance with low power consumption. The 'Q1' designation indicates automotive qualification, while the 'PWR' suffix specifically identifies the TSSOP-20 package variant.

Replacement Considerations

SN74HCS373PW-Q1 (TSSOP-20)

FAQ

How does the latch enable (LE) input affect the output state?

When LE is high, data passes from D inputs to Q outputs. When LE is low, the outputs hold their last state regardless of input changes.

What is the function of the output enable (OE) input?

The active-low OE input controls the output drivers. When OE is low, outputs are active; when OE is high, outputs enter a high-impedance state.