74HC165 (8-Bit Parallel-in/Serial out Shift Register)

Overview

The 74HC165 is an 8-bit parallel-in/serial-out shift register from the 74HC family. It allows you to read up to 8 digital inputs (buttons, switches, sensors) using only a few microcontroller pins. By converting parallel data into serial form, this IC simplifies wiring and expands the I/O capabilities of your Arduino, ESP32, or any other microcontroller.

Key Features

• 8-bit parallel input for reading multiple digital signals simultaneously.
• Serial output for efficient data transfer over minimal pins.
• Wide operating voltage: 2V to 6V, compatible with 3.3V and 5V systems.
• High-speed operation with propagation delays suitable for most projects.
• Cascadable to read more than 8 inputs by linking multiple chips.
• Low power consumption ideal for battery-powered projects.

Technical Specifications

• Supply Voltage (Vcc): 2.0V to 6.0V
• Input Voltage (Vin): 0V to Vcc
• Output Current: ±5.2 mA at 5V
• Propagation Delay: 35 ns (typical) at 5V
• Operating Temperature: -40°C to +125°C
• Package: DIP-16 (through-hole) or SOIC-16 (surface mount)
• Logic Family: 74HC (High-Speed CMOS)

Applications & Use Cases

• Reading multiple buttons or switches in control panels and keyboards.
• Interfacing with sensor arrays (e.g., line-following robots).
• Expanding digital inputs on Arduino, Raspberry Pi, ESP32, or PIC microcontrollers.
• Creating shift register cascades for large input matrices.
• Educational projects to demonstrate parallel-to-serial conversion.

What's Included

• 1x 74HC165 IC (DIP-16 package)

Compatibility

• Works with all major microcontrollers: Arduino, ESP32, Raspberry Pi (via GPIO), STM32, PIC, AVR, etc.
• Compatible with 3.3V and 5V logic levels.
• Can be used with breadboards and perfboards.

MOKWN Recommendation

Whether you're a hobbyist, student, or professional engineer, the 74HC165 is an essential component for any electronics workbench. It's perfect for projects that require reading many inputs without sacrificing precious GPIO pins. Get yours today at MOKWN and take your projects to the next level!