The PCA9555D-T is a robust I/O expander from NXP Semiconductors designed to provide additional input/output (I/O) ports for microcontrollers in a range of applications. This versatile device extends the capabilities of control systems by offering an additional 16 I/O ports, which can be configured as either inputs or outputs.

Key Features

• Interface: The PCA9555D-T operates via a two-wire I²C-bus/SMBus interface, which is widely used for serial communication. This allows for easy integration with most microcontrollers and processors.
• Port Configuration: It features 16 I/O pins that can be individually switched between input or output, providing flexibility for a wide range of applications.
• Operating Voltage: The device supports an operating voltage range from 2.3V to 5.5V, making it suitable for various logic levels and compatible with both 3.3V and 5V systems.
• Interrupt Output: An interrupt output is available, which can be configured to alert the host microcontroller when an input state has changed, improving system efficiency by reducing the need for continuous polling.
• Polarity Inversion: Input port polarity inversion is possible, allowing for easy adaptation to different logic signal requirements.

Applications

The PCA9555D-T is ideal for use in a range of applications where additional I/Os are needed, such as:

• Servers
• Personal computers
• Industrial control
• Robotics
• Embedded systems

Product Specifications

With its easy-to-use interface, flexible I/O configuration, and broad voltage compatibility, the NXP PCA9555D-T I/O expander is a practical solution for expanding the I/O capabilities of your microcontroller-based projects and products.