SN74HCS165QPWRQ1

Shift Registers Overview

The SN74HCS165QPWRQ1 is an automotive-grade, 8-bit parallel-load shift register from Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports ambient temperatures from -40°C to +125°C. The device features Schmitt-trigger inputs for noise rejection and balanced CMOS push-pull outputs capable of ±7.8 mA drive current at 6 V. It is housed in a 16-pin TSSOP package.

Shift Registers Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades and ESD protection levels.
• Schmitt-trigger inputs provide high tolerance to slow or noisy input signals through defined hysteresis.
• Balanced CMOS push-pull outputs ensure similar sourcing and sinking capabilities for reliable signal transmission.

Shift Registers Applications

• Increasing the number of available inputs on a microcontroller
• Cascading multiple units to expand data input capacity while maintaining a single serial interface

Shift Registers Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel specifications. Confirm AEC-Q100 qualification status and temperature grade requirements align with the target automotive application environment before finalizing procurement orders.

Shift Registers Selection Notes

Select this component when designing systems requiring robust noise immunity for digital inputs. The wide operating voltage range allows compatibility with various logic families. Ensure output load conditions remain within the specified capacitive limits to maintain timing performance.

Shift Registers Part Context

This part belongs to the SN74HCS165-Q1 family of automotive parallel-load shift registers. It shares functional characteristics with other members of the HCS series but is distinguished by its specific packaging and automotive reliability certifications provided by Texas Instruments.

Shift Registers Replacement Considerations

SN74HCS165PW-Q1

Shift Registers FAQ

How does the device handle unused inputs?

Unused inputs must be terminated to either VCC or ground using pull-up or pull-down resistors to prevent undefined states.

What is the function of the CLK INH pin?

The Clock Inhibit (CLK INH) input prevents clock pulses from being detected when held high, effectively pausing the shifting operation.