The PCA9671BS from NXP Semiconductors is a robust, high-performance 16-bit I/O expander designed to provide additional digital I/O interfaces to a microcontroller or processor through a fast I²C-bus interface. This versatile expander is an ideal solution for applications where additional I/Os are required, such as in industrial control, server motherboards, and automotive control systems.

Key Features

• Interface: I²C-bus interface supporting up to 1 MHz (Fast-mode Plus) ensures quick communication and system responsiveness.
• Ports: 16-bit general-purpose I/O ports that can be used as either inputs or outputs, providing flexibility in various applications.
• Power Supply: Operating voltage range from 2.3 V to 5.5 V makes the PCA9671BS compatible with a wide array of logic levels and suitable for battery-operated devices.
• Output Drive Capability: High current drive options for outputs (25 mA sink, 25 mA source) to directly drive LEDs or other devices.
• Polarity Inversion: Polarity inversion register allows inversion of the polarity of the I/Os, providing additional control options.
• Interrupt Output: Interrupt output can be configured to reflect any changes on the input ports, enabling prompt system responses to input changes.

Applications

The PCA9671BS is widely used in a range of applications where expansion of I/O capabilities is necessary. It is particularly useful in:

• Industrial control systems
• Automotive control systems
• Server motherboards
• Home automation
• Robotics

Package and Quality

The device comes in a compact HVQFN24 package, which is designed for space-constrained applications. The PCA9671BS is also characterized for operation from -40°C to +85°C, ensuring reliable performance in harsh environments. With NXP's commitment to quality, this I/O expander is a dependable choice for expanding your system's capabilities.