SN74HC165DR

Shift Registers Overview

The SN74HC165DR is an 8-bit parallel-load shift register manufactured by Texas Instruments. It belongs to the HC logic family and utilizes CMOS technology. The device converts eight parallel data inputs into a serial output, facilitating efficient data transmission in digital systems. It operates within a supply voltage range of 2 V to 6 V and supports a wide operating temperature range from -40°C to +125°C. The component is housed in a 16-pin SOIC package designed for surface-mount installation.

Shift Registers Feature Summary

• Provides asynchronous parallel loading capability for immediate data capture across all input lines.

Shift Registers Applications

• Microcontroller input expansion for reading multiple switch states
• Keyboard matrix scanning interfaces
• Serial data acquisition in industrial control systems

Shift Registers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage requirements and thermal management constraints before finalizing procurement decisions.

Shift Registers Selection Notes

Select this component when expanding digital input capacity for microcontrollers using minimal I/O pins. Consider the HC logic family characteristics regarding speed and power consumption relative to system requirements.

Shift Registers Part Context

This part is a member of the SN74HC165 series, which includes variants with different packaging options such as TSSOP or automotive-grade qualifications like the SN74HC165QPWRG4Q1. The DR suffix specifically denotes the SOIC-16 surface-mount package configuration.

Shift Registers FAQ

What is the function of the !PL pin?

The !PL (Parallel Load) pin is an active-low input that triggers the asynchronous loading of parallel data into the register when driven low.

Does the SN74HC165DR provide complementary outputs?

Yes, the device provides both QH and !QH serial outputs, offering complementary signals for flexible circuit design.