ON Semiconductor CAT9555WI-T1 Overview

The CAT9555WI-T1 from ON Semiconductor is a robust integrated circuit designed to provide an efficient I/O expansion solution for microcontroller-based systems. It is a 16-bit I/O port expander with an I2C interface, which allows for easy integration into a wide range of applications, from consumer electronics to industrial control systems.

Key Features

• 16-bit I/O Ports: The device features 16 I/O ports that can be individually configured as inputs or outputs, offering flexibility in interfacing with various peripheral devices.
• I2C Interface: It utilizes a standard I2C-bus Serial Interface for communication, which supports 400kHz Fast I2C-bus protocol, ensuring compatibility with a large ecosystem of microcontrollers and processors.
• Interrupt Output: An interrupt output is provided to signal the host microcontroller when an input state has changed, enabling efficient resource utilization by avoiding the need for continuous polling.
• Power-on Reset: The CAT9555WI-T1 includes a power-on reset feature, which ensures that the I/O expander starts in a known state, thereby simplifying system initialization.
• Low Standby Current: Optimized for power-sensitive applications, the device features a low standby current, making it suitable for battery-operated devices.
• Operating Voltage Range: It operates within a 2.3V to 5.5V range, accommodating various logic levels and making it versatile for different system designs.
• High Drive Capability: The I/O ports can source or sink up to 25 mA, providing the necessary drive capability for LEDs and other devices.
• Software Programmable: All registers can be programmed via the I2C bus, offering a high degree of control over the device's functionality.

Applications

The CAT9555WI-T1 is suitable for a multitude of applications that require additional I/O ports. It can be used in:

• Home automation systems
• Industrial controls
• Server motherboards
• Embedded systems
• Consumer electronics

With its extended temperature range and durable design, the CAT9555WI-T1 is an ideal choice for expanding the I/O capability of your next project while maintaining a compact footprint and conserving power.