SN74AHC165QPWRQ1

Shift Registers Overview

The SN74AHC165QPWRQ1 is an automotive-grade, 8-bit parallel-load shift register from Texas Instruments. It features a serial-in, parallel-out architecture with separate clocks for the shift and storage registers. The device operates within a supply voltage range of 2 V to 5.5 V and supports an operating temperature range of -40°C to +125°C. It includes a direct overriding clear input, a serial data input for cascading, and 3-state outputs. The component meets AEC-Q100 Grade 1 qualification standards.

Shift Registers Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature and ESD ratings
• Balanced CMOS push-pull outputs providing high drive capability
• Wettable flank package option available for improved solder joint inspection
• Latching logic circuitry with unknown default state at power-on

Shift Registers Applications

• Network switches
• Power infrastructures
• LED displays
• Servers

Shift Registers Procurement Notes

Verify the specific package variant (TSSOP or WQFN) required for the design, as the Q1 suffix denotes automotive qualification but does not specify the physical footprint. Confirm that the wettable flank feature is necessary for automated optical inspection requirements if using the QFN package. Ensure the system controller timing aligns with the setup and hold time specifications provided in the datasheet.

Shift Registers Selection Notes

Select this component when an 8-bit parallel-to-serial conversion is needed in automotive environments. It is suitable for reducing system controller I/O pins by cascading multiple units. Consider the 2-V to 5.5-V operating range for compatibility with various logic levels. Verify that the output capacitive load does not exceed recommended limits to maintain signal integrity and switching performance.

Shift Registers Part Context

This part belongs to the SN74AHC165-Q1 family of automotive 8-bit shift registers. It shares functional similarities with other AHC series devices but is specifically qualified for automotive use under AEC-Q100 standards. The 'PWR' suffix indicates a TSSOP-16 package, while the 'Q1' suffix confirms automotive grade. It serves as a digital interface component for expanding input capabilities in vehicle electronics.

Shift Registers Replacement Considerations

SN74AHC165PW

Shift Registers FAQ

What is the default state of the internal latches upon power-up?

There is no default state for each latch at start-up; the state is unknown until data is loaded or shifted.

How should unused standard CMOS inputs be handled?

Unused inputs must not be left floating. They should be terminated to VCC or GND, typically using a pull-up or pull-down resistor.