The NXP PCA9673BS is a robust 16-bit I/O (Input/Output) expander designed to provide additional GPIO (General Purpose Input/Output) interfaces for microcontrollers where additional I/Os are needed. This device operates on the I²C-bus/SMBus, allowing seamless integration with most microcontroller architectures. The PCA9673BS is particularly well-suited for expanding the I/O capabilities in applications where board space is at a premium, such as mobile devices, industrial control systems, and embedded electronics.

Key Features

• Interface: I²C-bus/SMBus compatible, operating up to 400 kHz with a 5V tolerant I/O.
• Channels: 16-bit I/O ports which can be used as either inputs or outputs.
• Output Drive: 25 mA sink capability for directly driving LEDs.
• Configurability: Configurable polarity inversion register to invert the polarity of the input port data.
• Power Management: Low standby current and features power-down mode to conserve energy.
• Addressing: Three hardware address pins to allow up to eight devices on the same bus.
• Packaging: Available in a compact HWQFN24 package.

Applications

The PCA9673BS is versatile and can be used in a variety of applications. It is particularly useful in scenarios requiring additional I/Os without the need for a larger or more expensive microcontroller. Common applications include:

• Server motherboards
• Industrial automation
• Robotics
• Home automation systems
• Medical equipment

Advantages

By using the NXP PCA9673BS, designers can enjoy several advantages, including reduced system complexity, lower overall system cost, and improved scalability. Its ease of integration and flexibility make it an excellent choice for expanding system capabilities in a wide range of electronic products.

Technical Specifications

The PCA9673BS is a testament to NXP's commitment to providing innovative solutions for expanding I/O capabilities in space-constrained and complex environments.