NXP PCA9575PW2: Remote 16-bit I/O Expander for I²C-bus

The NXP PCA9575PW2 is a sophisticated 16-bit I/O expander designed to provide additional input/output (I/O) ports for microcontrollers when interfacing with the I²C-bus. This powerful component is an ideal solution for applications where I/O pins on a microcontroller are at a premium, offering a versatile and efficient way to increase the number of I/O options without the need for additional microcontrollers.

Key Features

• Extended I/O: The PCA9575PW2 provides 16 additional I/O ports, which can be individually set to input or output, allowing for a flexible interface with a variety of peripherals.
• I²C-bus Interface: The device supports a bidirectional I²C-bus (Serial Clock (SCL), Serial Data (SDA)) operating at a frequency of up to 400 kHz, making it compatible with most microcontroller I²C interfaces.
• Low Standby Current: It is optimized for low power consumption, with a low standby current that is ideal for battery-powered applications.
• Input/Output Configuration: Each I/O port can be configured as an input or output without the use of any external components, simplifying design and reducing hardware costs.
• Interrupt Output: An interrupt output is provided to indicate a change in input status, which helps to improve system efficiency by eliminating the need for continuous polling by the microcontroller.
• Power Supply: The PCA9575PW2 operates from a wide range of power supplies, from 2.3V to 5.5V, accommodating various logic levels and making it suitable for both 3.3V and 5V systems.
• Polarity Inversion: Input port polarity inversion is possible, enabling the device to adapt to the logic levels expected by the microcontroller.
• Packaging: Available in a TSSOP24 package, the PCA9575PW2 is designed for space-saving on PCBs and is suitable for automated assembly processes.

Applications

The PCA9575PW2 is versatile and can be used in a wide range of applications, including:

• Server infrastructure
• Industrial control systems
• Home automation
• Consumer electronics
• Robotics

With its extensive feature set and ease of integration, the NXP PCA9575PW2 is an excellent choice for designers looking to expand the I/O capabilities of their microcontroller-based projects efficiently and cost-effectively.