NXP PCA9539BS-T: Remote 16-bit I/O Expander

The PCA9539BS-T is a robust, high-performance I/O expander from NXP Semiconductors, designed to provide additional I/O capabilities to microcontroller-based systems via the I²C-bus and SMBus. This device offers a versatile solution for systems that require expanded I/O lines but have limited GPIOs available on the main processor.

Key Features

• 16-bit I/O Ports: The PCA9539BS-T features 16 I/O ports that can be individually set to input or output, allowing for flexible configuration tailored to the needs of the application.
• I²C-bus/SMBus Interface: It supports both the I²C-bus and SMBus serial interfaces, with a frequency of up to 400 kHz (Fast-mode) and 100 kHz (Standard-mode), enabling easy integration with most microcontrollers.
• Low Standby Current: The device is optimized for low power consumption, with a typical standby current of only 10 μA, which is ideal for battery-powered and power-sensitive applications.
• Interrupt Output: An interrupt output is provided to signal the host microcontroller when an input state has changed, enhancing system responsiveness without the need for constant polling.
• Power Supply Range: The PCA9539BS-T operates from a wide power supply voltage range of 2.3V to 5.5V, making it suitable for various logic levels and ensuring compatibility with both 3.3V and 5V systems.
• Additional Features: The device includes features such as noise filter on the SCL/SDA inputs, active LOW reset input, and latched outputs with high-current drive capability for directly driving LEDs.

Applications

The PCA9539BS-T is a versatile component that can be used in a wide array of applications, from industrial control systems to consumer electronics. Its ability to expand the I/O capabilities of microcontrollers makes it ideal for:

• Servers
• Embedded systems
• PLC systems
• Home automation
• Robotics

Quality and Reliability

NXP Semiconductors is known for its commitment to quality and reliability, and the PCA9539BS-T is no exception. This I/O expander is designed to meet the rigorous demands of modern electronic systems, ensuring stable and reliable performance across its operational lifespan.