The NXP PCA9555AHF is a robust 16-bit I²C-bus and SMBus I/O expander designed to provide additional digital interfacing capabilities to microcontrollers and microprocessors in a wide range of applications. This integrated circuit is part of NXP's extensive I/O expanders portfolio, offering a flexible and low-power solution for system designers looking to expand the number of I/Os available on their systems.

Key Features

• Interface: I²C-bus and SMBus compatible, supporting standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) I²C-bus modes.
• Channels: 16-bit I/O ports split into two 8-bit ports (Port 0 and Port 1).
• Power Supply: Operating voltage range from 2.3V to 5.5V, suitable for a variety of logic levels and making it compatible with most microcontrollers.
• Interrupt Output: Configurable interrupt output which can be connected to the interrupt logic of the host microcontroller.
• Configurable Polarity: Polarity inversion register to configure the polarity of the input port data.
• Output Drive Capability: Open-drain or push-pull output configuration, providing versatility for different application requirements.

Applications

The PCA9555AHF is ideal for use in a variety of applications where extending the number of I/Os is necessary. This includes:

• Servers
• Personal computers
• Industrial control
• Medical equipment
• Gaming machines
• Home automation systems

Package and Quality

The PCA9555AHF is offered in a TSSOP24 package, which is designed to meet the requirements of space-constrained applications. It is also characterized for operation from -40°C to +85°C, ensuring reliable performance in a wide range of environmental conditions. NXP's commitment to quality ensures that the PCA9555AHF meets the stringent requirements of the industrial and consumer markets.