The NXP PCA6408AHKX is a versatile 8-bit General Purpose Input/Output (GPIO) expander with an I²C-bus/SMBus interface that provides the perfect solution for expanding IO capabilities of any I²C compatible microcontroller. This GPIO expander is ideal for applications where additional I/Os are needed or when a microcontroller with a limited number of I/O pins is in use.

Key Features

• 8-bit I/O Expander: Offers eight individual I/O pins which can be configured as inputs or outputs, providing flexibility for a wide range of applications.
• I²C-bus Interface: Features a fast I²C interface with a maximum clock frequency of 400 kHz, allowing for quick communication with the host controller.
• Low Standby Current: Designed for power-sensitive applications, the PCA6408AHKX has a very low standby current.
• Interrupt Output: Includes an interrupt output which can be configured to reflect the status of the input pins, thus eliminating the need for constant polling by the host microcontroller.
• Configurable Polarity: Input and output polarity is configurable, enabling the device to adapt to the logic level requirements of different microcontrollers or peripherals.
• Power Supply Voltage Range: Supports a wide range of power supply voltages from 2.3V to 5.5V, making it suitable for both 3.3V and 5V systems.
• Small Footprint: Comes in a compact HVQFN20 package, which is ideal for space-constrained applications.

Applications

The PCA6408AHKX is used in a variety of applications that require additional I/Os, including:

• Servers
• Embedded systems
• Industrial control
• Home automation
• Consumer electronics

With its easy-to-use I²C interface and flexible I/O configuration, the NXP PCA6408AHKX is a practical choice for designers looking to enhance the I/O capabilities of their systems with minimal design complexity and footprint.