Maximizing Connectivity with the Nexperia NCA9555 I/O Expander

In today’s world of electronics, the need for more input/output (I/O) ports is becoming increasingly important. With the advancement of technology, we are seeing more and more devices that require a vast amount of I/O ports to function effectively. That’s where the NCA9555 I²C I/O Expander by Nexperia comes in.

The NCA9555 is a low-voltage 16-bit I²C and SMBus I/O expander that provides 16 bits of General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications. It is designed to operate in a wide voltage range of 1.65V to 5.5V and comes with interrupt and default pull-up resistors on the GPIOs.

This I/O expander is designed for a variety of applications, including ACPI power switches, sensors, push buttons, LEDs, fan control, and many more. With the NCA9555, you can add additional I/O ports to your device while keeping the interconnections to a minimum. This makes it an elegant solution for those looking to expand their device’s I/O capabilities.

The NCA9555 contains a set of 8-bit input, output, configuration, and polarity inversion registers. By default, all I/O ports are set to input at power-up, but each port can be configured as either an input or output by changing the corresponding bit in the configuration register. The data for each input or output is stored in the corresponding input or output register, making it easy to manage your device’s I/O.

Another feature of the NCA9555 is its open-drain interrupt output, which is activated when any one of the GPIOs changes from its corresponding input port register state. This provides real-time feedback and allows you to respond to changes in your device’s I/O quickly and effectively.

Finally, the NCA9555 has three address pins (A0, A1, and A2) that can be used to configure the I²C bus address of the device. This allows up to eight of these devices to share the same I²C-bus/SMBus, along with many devices other I²C-bus, providing a flexible and cost-effective solution for expanding your device’s I/O.

The NCA9555 I/O Expander by Nexperia is a powerful and versatile device that offers a simple and effective solution for expanding the I/O capabilities of your device. Whether you’re looking to add more I/O ports to your device or looking for a more efficient way to manage your device’s I/O, the NCA9555 is the perfect choice.

You can purchase the Nexperia NCA9555 from many vendors, including

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