Product Overview: PCA9555BS from NXP

The PCA9555BS is a sophisticated integrated circuit from NXP Semiconductors, renowned for its high-performance and reliable semiconductor products. This device is part of the PCA9555 series, which are 16-bit I²C-bus and SMBus I/O expanders designed to provide general-purpose remote I/O expansion for most microcontroller families.

Key Features

• I/O Expansion: The PCA9555BS offers 16 additional I/O ports which are configured as two 8-bit ports (Port 0 and Port 1). This is particularly useful for microcontrollers where the number of I/O pins is limited.
• Interface: It features an I²C-bus interface supporting both 400 kHz I²C-bus fast-mode and 100 kHz standard-mode data transfer rates. Additionally, it is compatible with SMBus standards.
• Addressing: Up to eight PCA9555BS devices can be connected to the same I²C-bus/SMBus, allowing for up to 128 additional I/Os using just two bus lines. This is achieved through three hardware address pins that allow multiple devices to share the same bus.
• Polarity Inversion: The input port registers can invert the polarity of the incoming logic levels, providing extra flexibility in interfacing with different logic signals.
• Power Supply: It operates from a power supply voltage ranging from 2.3V to 5.5V, making it suitable for a wide range of applications, including battery-powered devices.

Applications

The PCA9555BS is ideal for a variety of applications across different sectors including, but not limited to:

• Servers
• Personal computers
• Industrial control
• Medical equipment
• Gaming consoles
• Home automation

Package and Quality

The device is offered in a compact HVQFN24 package, which is designed for space-constrained applications. It also meets the stringent requirements of the industrial temperature range, ensuring reliable operation under extreme conditions. As with all NXP products, the PCA9555BS is manufactured to the highest quality standards, ensuring robust performance and longevity in the field.