The PCA9555APW from NXP Semiconductors is a robust, low-voltage 16-bit General Purpose Input/Output (GPIO) expander with interrupt and weak pull-up resistors. This device offers an ideal solution for expanding I/O capabilities of microcontrollers with fewer pins, particularly in applications where space and power efficiency are critical considerations.

Key Features

• Interface: I²C-bus/SMBus compatible interface, supporting up to 400 kHz (Fast-mode) and 100 kHz (Standard-mode) operation.
• Voltage Range: Operating voltage range of 2.3V to 5.5V, making it suitable for a wide variety of logic levels and ensuring compatibility with both 3.3V and 5V systems.
• Channels: 16-bit I/O ports, configurable as either inputs or outputs, provide ample expansion for most microcontroller-based systems.
• Interrupt Output: An interrupt output can be configured to alert the host microcontroller of changes on the input ports, reducing the need for continuous polling and thus saving power.
• Pull-up Resistors: Integrated weak pull-up resistors on the I/O ports simplify design and reduce external component count.
• Packaging: Offered in a TSSOP-24 package, the PCA9555APW is designed for space-saving on PCBs and easy integration into various designs.

Applications

The PCA9555APW is versatile and can be used in a range of applications, including:

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

Advantages

With its extended temperature range and low power consumption, the PCA9555APW is designed for reliability and efficiency. Its I²C-bus interface ensures easy integration with most microcontrollers, making it a go-to solution for system designers looking to expand I/O capabilities without increasing the footprint of their design.

Ordering Information

The NXP PCA9555APW is available for order under the part number PCA9555APW,112. For detailed specifications, datasheets, and ordering information, please visit the NXP Semiconductors official website or contact your local authorized distributor.