Product Overview: NXP PCA9539BS,118

The NXP PCA9539BS,118 is a robust, low-voltage 16-bit General Purpose Input/Output (GPIO) expander with interrupt and weak pull-up resistors. Designed for the I²C-bus and SMBus, this device provides an ideal solution for expanding I/O capabilities of I²C-bus/SMBus compatible microcontrollers and microprocessors, particularly where additional I/O pins are required.

Key Features

• I²C-bus/SMBus Interface: The PCA9539BS,118 operates as a slave on the I²C-bus and SMBus, with support for standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) I²C-bus modes, ensuring compatibility with a wide range of microcontrollers.
• 16-bit GPIO: The device expands the GPIO capabilities by providing 16 additional input/output pins, which can be configured individually as either inputs or outputs, giving designers flexibility in their applications.
• Interrupt Output: An interrupt output is available to indicate to the host controller when an input state has changed, enhancing system responsiveness and efficiency by negating the need for continuous polling.
• Configurable Polarity: Input and output polarity is configurable, allowing for easy integration into systems where signal inversion is necessary.
• Low Standby Current: The PCA9539BS,118 is optimized for low power consumption, with a low standby current making it suitable for battery-powered and power-sensitive applications.
• Wide Operating Voltage: This GPIO expander can operate across a wide voltage range of 2.3V to 5.5V, accommodating various system power requirements.
• Package: The device comes in a TSSOP24 package, which is ideal for space-constrained applications.

Applications

The NXP PCA9539BS,118 is versatile and can be used in a variety of applications, including:

• Server motherboards
• Embedded systems
• Industrial control systems
• Signal processing
• Consumer electronics

With its easy-to-use I²C-bus interface and additional GPIOs, the PCA9539BS,118 is a practical solution for system designers looking to improve I/O capabilities without increasing the complexity or size of their projects.