NXP PCA9539RPW/Q900J Remote 16-bit I/O Expander

The NXP PCA9539RPW/Q900J is a robust remote 16-bit I/O expander designed to provide additional I/O capabilities to microcontroller systems in a space-efficient manner. This device is part of NXP's extensive I/O expanders portfolio, providing a versatile solution for systems with limited GPIOs.

Key Features

• Interface: The PCA9539RPW/Q900J communicates through a bidirectional I²C-bus and features an interrupt output for input change notification, which enhances its utility in complex embedded systems.
• Voltage Range: It operates across a wide voltage range from 2.3V to 5.5V, making it suitable for a variety of logic levels and ensuring compatibility with both 3.3V and 5V microcontrollers.
• Output Current: Each I/O can sink or source up to 25 mA, providing sufficient current for most peripheral devices, while total package sink and source capability is 200 mA.
• 16-bit I/O: The device offers 16-bit of general-purpose parallel input and output expansion, which is ideal for applications where pins on the microcontroller are at a premium.
• Configurability: The I/Os can be individually set to input or output by writing to the configuration register, offering flexibility in application design.
• Power-Up State: All I/O pins are set to inputs at power-up to prevent unintended outputs that might disrupt connected devices.

Applications

The PCA9539RPW/Q900J is adept for use in a range of applications where I/O expansion is necessary. This includes industrial control, home automation, server motherboards, and any system that requires additional I/O ports without the need for a larger microcontroller or processor. Its robust design ensures reliable operation in various environments and applications.

Package and Quality

This I/O expander comes in a TSSOP-24 package, offering a compact footprint for space-constrained applications. NXP's commitment to quality ensures that the PCA9539RPW/Q900J meets the stringent requirements of industrial and commercial device standards.