The NXP PCA9673BQ is a robust 16-bit I/O (Input/Output) expander designed to provide additional GPIO (General Purpose Input/Output) interfaces for microcontrollers and microprocessors within a compact package. This highly integrated component is part of NXP's extensive I/O expander product line, offering a seamless solution for systems that require additional I/Os with minimal design complexity.

Key Features

• Expansive I/O Interface: With 16 I/O ports, the PCA9673BQ can significantly expand the I/O capabilities of your system, making it ideal for applications with limited GPIOs on the main controller.
• I²C-bus Interface: It features a built-in I²C-bus interface, supporting 400 kHz Fast-mode I²C for quick communication with the main processor.
• Low Standby Current: Designed for power-sensitive applications, the PCA9673BQ offers a low standby current, making it suitable for battery-operated devices.
• Programmable Polarity Inversion: Individual I/O configuration is made easy with programmable polarity inversion registers, allowing for customizable interface setups.
• High Drive Capability: The device is capable of sourcing or sinking up to 25 mA on each port, providing sufficient drive capability for a wide range of peripherals.
• 3 Hardware Address Pins: It includes 3 hardware address pins to allow up to 8 devices on the same I²C-bus, enabling a possible 128 additional I/Os for complex systems.

Applications

The PCA9673BQ is an excellent choice for a variety of applications where additional I/Os are needed without redesigning the core processor. This includes use in servers, personal electronics, industrial control systems, and any other systems that require a high number of I/Os without compromising on space or power efficiency.

Package and Quality

The device is offered in a space-saving HVQFN24 package, ensuring a minimal footprint on the PCB. In addition, NXP's commitment to quality means that the PCA9673BQ is designed and tested to meet high reliability and performance standards, providing confidence for integration into your product designs.