SN74HCS164QPWRQ1

Shift Registers Overview

The SN74HCS164QPWRQ1 is an automotive-grade, 8-bit serial-in/parallel-out shift register from Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports temperatures from -40°C to +125°C. The device features Schmitt-trigger inputs for noise rejection and provides balanced CMOS push-pull outputs with ±7.8 mA drive capability at 6 V. Propagation delay ranges from 7 ns to 25 ns depending on voltage and temperature.

Shift Registers Feature Summary

• AEC-Q100 qualified for automotive applications
• Schmitt-trigger inputs for noisy signal tolerance
• Balanced CMOS push-pull outputs
• AND-gated serial inputs

Shift Registers Applications

• Output expansion
• LED matrix control
• 7-segment display control
• 8-bit data storage

Shift Registers Procurement Notes

Verify the specific package variant (PW, D, BQA, or DYY) against the design requirements, as thermal characteristics vary significantly between TSSOP, SOIC, WQFN, and SOT-23-THIN options. Confirm that the system power supply remains strictly within the 2 V to 6 V operating range to ensure electrical parameters meet datasheet specifications.

Shift Registers Selection Notes

Select this component when robust noise immunity is required due to its Schmitt-trigger architecture. It is suitable for designs needing simple GPIO control without complex communication interfaces. Ensure output loading does not exceed the specified capacitive limits to maintain timing performance.

Shift Registers Part Context

This part belongs to the SN74HCS164-Q1 family of automotive logic devices. It shares functional similarities with standard industrial shift registers but includes enhanced ESD protection and extended temperature ratings specifically validated for automotive environments.

Shift Registers Replacement Considerations

SN74HCS164PW-Q1

Shift Registers FAQ

How do the AND-gated serial inputs function?

Data enters the first flip-flop only when both Serial Input A and Serial Input B are high. If either input is low, the first stage resets to low upon the next clock pulse.

What is the behavior of unused inputs?

Unused inputs must be tied to either VCC or GND to prevent undefined operational states. Floating inputs are not permitted.