74AHCT164BQ-Q100X

Shift Registers Overview

The Nexperia 74AHCT164BQ-Q100X is an automotive-grade, 8-bit serial-in/parallel-out shift register. It operates within a supply voltage range of 2.0 V to 5.5 V and features two serial data inputs (DSA, DSB) and eight parallel outputs (Q0–Q7). Data shifts on the LOW-to-HIGH clock transition, with an active LOW master reset clearing all outputs. The device utilizes DHVQFN-14 packaging (SOT762-1) with side-wettable flanks for AOI compatibility. It meets AEC-Q100 Grade 1 standards, supports temperatures from -40 °C to +125 °C, and includes Schmitt-trigger inputs with overvoltage tolerance up to 5.5 V.

Shift Registers Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards for reliable operation in vehicle environments.
• Dual serial inputs allow flexible configuration where either input acts as an active HIGH enable for the other.
• Schmitt-trigger action on all inputs ensures tolerance for slow rise and fall times while maintaining high noise immunity.
• DHVQFN package design incorporates side-wettable flanks to facilitate automatic optical inspection of solder joints.

Shift Registers Applications

• Automotive electronic systems requiring robust serial-to-parallel conversion
• Mixed-voltage logic translation environments utilizing overvoltage tolerant inputs
• Industrial control circuits operating under extended temperature conditions

Shift Registers Procurement Notes

Verify that the specific ordering suffix matches the required DHVQFN-14 package variant. Confirm the AEC-Q100 Grade 1 qualification status aligns with automotive reliability requirements. Ensure the TTL input level specification corresponds correctly with the system logic voltage levels before finalizing procurement specifications.

Shift Registers Selection Notes

Select this component when TTL-compatible input thresholds are necessary alongside CMOS performance characteristics. The device is appropriate for designs requiring wide supply voltage flexibility and extended thermal stability. Consider the DHVQFN package dimensions and thermal properties if space constraints or heat dissipation are critical factors in the layout.

Shift Registers Part Context

This part belongs to the Nexperia 74AHC/AHCT164-Q100 family of 8-bit shift registers. It shares functional similarities with the 74HC164BQ-Q100X but differs in input threshold levels, offering TTL compatibility instead of pure CMOS levels. Both variants utilize the same SOT762-1 package and automotive qualification standards.

Shift Registers Replacement Considerations

The SN74HCS164QBQARQ1 from Texas Instruments is documented as a similar alternative. Verify pinout compatibility and electrical parameter alignment before substitution.

Shift Registers FAQ

How do the dual serial inputs function?

Data can be entered through either DSA or DSB. One input serves as the data path while the other acts as an active HIGH enable for data entry.

What is the effect of the master reset input?

A LOW signal on the master reset (MR) input clears the register, forcing all parallel outputs to a LOW state regardless of other input conditions.