NXP PCA8575BQ,118 - 16-bit I²C-bus and SMBus I/O Expander

The PCA8575BQ,118 is a robust 16-bit I²C-bus and SMBus I/O expander designed by NXP Semiconductors to provide a seamless solution for expanding I/O capabilities of I²C-bus compatible devices. This integrated circuit is particularly suitable for applications where I/O pins on microcontrollers are limited and additional inputs or outputs are necessary.

With its 16-bit I/O port, the PCA8575BQ,118 offers an extended range of input/output options, making it an ideal choice for interfacing with a wide array of sensors, switches, and other input/output devices. The device operates as a slave on the I²C-bus, with every I/O pin configurable as either an input or an output, providing a high level of flexibility.

Key features of the PCA8575BQ,118 include:

• Operating power supply voltage range of 2.3V to 5.5V, allowing the device to support both 3.3V and 5V systems.
• Low standby current consumption, making it suitable for power-sensitive applications.
• 400 kHz I²C-bus interface speed, ensuring compatibility with fast mode I²C-bus devices.
• 16 programmable I/O pins that can be used as either inputs or outputs without the need for reconfiguration.
• Polarity inversion register for adjusting the polarity of the input port data.
• Three hardware address pins allowing up to eight PCA8575 devices on the same I²C-bus/SMBus.
• Interrupt output for input change notification, providing an efficient way to monitor input changes without constant polling.

The PCA8575BQ,118 comes in a compact HVQFN24 package, which is designed to occupy minimal space on the PCB while offering excellent thermal performance. This makes it suitable for space-constrained applications where board real estate is at a premium.

Whether you are developing industrial control systems, server motherboards, or portable electronics, the PCA8575BQ,118 from NXP Semiconductors offers a reliable and easy-to-implement solution for I/O expansion needs. Its versatility and ease of integration make it a go-to component for engineers looking to enhance the functionality of their microcontroller-based systems.