CAT9555 IO Expansion Module - 16 I/O Pins I2C SMBus Expander Board for Arduino, Raspberry Pi


Description and features

• 16 I/O Pins Expansion – This CAT9555 IO expansion board adds 16 programmable GPIO pins via I2C/SMBus interface, ideal for sensors, LEDs, and buttons.
• Wide Compatibility – Works seamlessly with 3.3V/5V systems and supports Arduino/ Pi, enabling flexible project integration.
• High-Performance Control – Features 400 kHz I2C communication and polarity inversion register for efficient signal management.
• Plug-and-Play Design – Includes active low interrupt output and internal power-on reset for reliable, hassle-free operation.
• Compact & Durable – Small 45x25mm PCB with 5V-tolerant I/O ports, perfect for DIY electronics and prototyping.

Product Description

The CAT9555 IO Expansion Module is a versatile I2C/SMBus-compatible board that adds 16 configurable GPIO pins to microcontrollers like Arduino, Pi, and ESP8266/ESP32. Designed for sensor arrays, LED control, and button interfacing, it solves the problem of limited I/O ports in embedded projects.

Key Features: ✔ 16-bit I/O expansion – Set pins as inputs or outputs via I2C commands.
✔ 400 kHz high-speed communication – Ensures rapid data transfer.
✔ 5V-tolerant I/O – Protects against voltage spikes.
✔ Polarity inversion & interrupt output – Simplifies event-driven designs.
✔ Compact 45x25mm size – Fits space-constrained setups.

Ideal for home automation, robotics, and industrial control, this module leverages the CAT9555 chip for low standby current and high drive capability. Supports up to 8 devices on one bus with 3 address pins.


Package Contents

CAT9555 IO Expansion Module x 1
PH2.0 20cm 5Pin x 1

Return Policy

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