The PCA8575BQ is a robust I/O expander from NXP Semiconductors designed to provide additional input/output (I/O) ports for microcontrollers where additional ports are needed. It operates as an interface between the high-speed serial I2C-bus and the parallel port peripheral devices. This product is particularly suitable for applications where I/O port expansions are required for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
Key Features
- Expansive I/O: The PCA8575BQ provides 16 additional I/O ports, which can be configured as inputs or outputs.
- Compatibility: It is compatible with most microcontrollers, offering a flexible solution for system designers looking to expand the I/O capabilities of their projects.
- I2C-bus Interface: The device supports the I2C-bus interface with a maximum clock frequency of 400 kHz, enabling quick communication with the host controller.
- Interrupt Output: An interrupt output is included, which can be activated when the input state changes, allowing for efficient use of the microcontroller's processing power.
- Low Standby Current: The PCA8575BQ is optimized for low standby current, making it an ideal choice for battery-operated and power-sensitive applications.
- Wide Operating Voltage: The device operates over a wide voltage range from 2.3V to 5.5V, providing design flexibility across various power supply levels.
- Polarity Inversion Register: Users can invert the polarity of the I/O ports through a dedicated register, simplifying the design of input polarity correction circuits.
Applications
The PCA8575BQ is versatile and can be used in a broad range of applications, including:
- Server motherboards
- Embedded systems
- Industrial control systems
- Medical equipment
- Automotive control systems
Package and Quality
The PCA8575BQ comes in a compact 24-pin HVQFN package, which is designed for space-constrained applications. NXP's commitment to quality ensures that the PCA8575BQ meets the rigorous standards required for industrial and automotive applications, providing a reliable solution for I/O expansion needs.
