Product Overview: NXP PCA9535BS

The NXP PCA9535BS is a robust, high-performance 16-bit I²C-bus and SMBus I/O expander designed to provide additional digital I/O ports for microcontrollers and microprocessors within a wide range of applications. This versatile component is particularly suitable for server motherboards, industrial automation, and embedded systems where an increase in I/O capabilities is required without additional microcontroller pins.

Key Features

• Interface: I²C-bus and SMBus compatible, supporting up to 400 kHz (Fast-mode) and 100 kHz (Standard-mode) operation.
• Channels: 16-bit I/O port expansion, split into two 8-bit ports (Port 0 and Port 1).
• Configurable Polarity: Polarity inversion register allows users to invert the polarity of the input port data.
• Power Supply: Operating voltage range from 2.3V to 5.5V, making it suitable for both 3.3V and 5V logic levels.
• Low Standby Current: Ideal for battery-powered devices due to its low standby current.
• Interrupt Output: Configurable interrupt output which can be connected to the interrupt logic of the microcontroller, allowing for immediate notification of input changes without needing to constantly poll the expander.

Applications

The PCA9535BS is widely used in applications that require additional I/O ports, such as:

• Server motherboards for system monitoring and control.
• Industrial automation for extending the number of sensor inputs and control outputs.
• Embedded systems where I/O port limitations exist.
• Consumer electronics, such as home entertainment systems and smart appliances.

Package and Quality

The device is offered in a space-saving 24-pin HVQFN package, which is lead-free and RoHS compliant. NXP ensures high reliability and performance, making the PCA9535BS a trusted choice for engineers and designers looking to expand the I/O capabilities of their systems with minimal power consumption and footprint.