SN74HC165AN

Shift Registers Overview

The SN74HC165AN is an 8-bit parallel-load shift register manufactured by Texas Instruments. It belongs to the HC logic family and operates on a single CMOS circuit. The device accepts data through eight direct inputs (A-H) and shifts it serially out via the QH terminal. It functions within a supply voltage range of 2 V to 6 V and supports an operating temperature range from -40°C to +125°C. The component is housed in a standard DIP-16 package, suitable for surface mount or through-hole integration depending on specific variant configurations.

Shift Registers Feature Summary

• Provides asynchronous parallel loading capability for immediate data capture across all eight input lines without clock dependency.
• Features a serial output that allows cascading with other shift registers to expand input capacity beyond the single chip limit.
• Includes complementary serial outputs to provide both true and inverted data streams simultaneously.

Shift Registers Applications

• Expanding digital input capabilities for microcontroller systems requiring multiple switch or sensor connections.
• Keyboard matrix scanning applications where row or column states are read sequentially.
• Data acquisition systems converting parallel status signals into a serial stream for processor handling.

Shift Registers Procurement Notes

Verify the exact suffix against the manufacturer's current datasheet to confirm pinout compatibility and package type. Ensure the selected variant meets the required voltage and temperature specifications for the target environment. Cross-reference ordering information directly with official Texas Instruments documentation to avoid discrepancies in functional descriptions.

Shift Registers Selection Notes

Select this component when a design requires converting multiple parallel digital inputs into a single serial data line. It is appropriate for systems needing to interface with switches, sensors, or other logic outputs using minimal I/O pins. Consider the HC logic family characteristics regarding speed and power consumption relative to the system requirements.

Shift Registers Part Context

This part is a member of the widely used 74HC series of high-speed CMOS logic devices. It serves as a fundamental building block for digital input expansion in embedded systems. The SN74HC165 specifically addresses the need to manage multiple discrete inputs efficiently in space-constrained or pin-limited designs.

Shift Registers Replacement Considerations

Compatible substitutes include the SN74HC165DR and SN74HC165N. Verify that any replacement maintains the same DIP-16 footprint and electrical characteristics to ensure seamless integration without circuit modification.