SN74HCS164QBQARQ1

Shift Registers Overview

The SN74HCS164QBQARQ1 is an automotive-grade, 8-bit parallel-out serial shift register from Texas Instruments. It features Schmitt-trigger inputs for noise immunity and operates within a supply voltage range of 2 V to 6 V. The device includes two AND-gated serial inputs (A and B) and an asynchronous active-low clear (CLR) function. Data shifts on the rising edge of the clock signal. It provides balanced CMOS push-pull outputs with ±7.8 mA drive capability at 6 V. The component is qualified under AEC-Q100 standards for temperature grade 1, supporting operation from -40°C to +125°C.

Shift Registers Feature Summary

• Schmitt-trigger inputs provide high noise rejection and tolerance for slow-edged signals
• AND-gated serial inputs allow precise control over data entry into the shift register
• Asynchronous clear input forces all registers to a low state immediately upon activation
• Balanced CMOS push-pull outputs ensure similar sourcing and sinking current capabilities

Shift Registers Applications

• Output expansion in automotive systems
• LED matrix control circuits
• Seven-segment display control interfaces
• 8-bit data storage applications

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package type, as the SN74HCS164-Q1 family utilizes multiple distinct packages including WQFN, TSSOP, SOIC, and SOT-23-THIN. Confirm that the selected variant aligns with the thermal and physical constraints of the target design. Ensure compliance with AEC-Q100 qualification requirements for the intended automotive application environment.

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 protocols. Consider the wide operating voltage range if interfacing with varying logic levels. Verify that the output drive current meets the load requirements, noting that excessive capacitive loading may impact performance.

Shift Registers Part Context

This device belongs to the SN74HCS164-Q1 series of automotive shift registers. It shares functional similarities with other HCS family members but is distinguished by its 8-bit serial-to-parallel configuration. The Q1 designation indicates automotive qualification, while the HCS prefix denotes High-Speed CMOS technology with Schmitt-trigger inputs, differentiating it from standard or LV variants.

Shift Registers Replacement Considerations

Direct substitutes include other SN74HCS164-Q1 variants with different packaging options such as SN74HCS164PW-Q1 (TSSOP), SN74HCS164D-Q1 (SOIC), or SN74HCS164DYY-Q1 (SOT-23-THIN). Non-automotive equivalents like the SN74HCS164 exist but lack AEC-Q100 certification.