NXP PCA9564 Parallel Bus to I2C-Bus Protocol Interface

The NXP PCA9564 is a highly versatile interface chip designed to bridge the gap between the parallel bus of a microcontroller and the I2C-bus, allowing for expanded functionality and connectivity options. This protocol interface is an essential component for applications where an I2C-bus needs to be driven by a non-I2C-capable microcontroller or when multiple I2C-buses are required.

Key Features

• Parallel-Bus Compatibility: The PCA9564 is designed to interface directly with the microcontroller's parallel bus, supporting both Intel and Motorola modes, making it easy to integrate with a wide range of microcontrollers.
• I2C-Bus Interface: It supports multi-master I2C-bus protocols, enabling seamless communication with I2C-compatible devices.
• Operating Voltage: The device operates within a supply voltage range of 2.5V to 5.5V, catering to various logic levels and ensuring compatibility with both 3.3V and 5V systems.
• High-Speed Operation: The PCA9564 can handle I2C-bus speeds of up to 400 kHz, allowing for high-speed data transfers.
• Interrupt Function: An interrupt output is provided to indicate the completion of a byte transfer, alerting the host microcontroller without the need for constant polling.
• Additional Features: It includes an active LOW reset input that initializes the I2C-bus/SMBus state machine which simplifies the power-up sequence and interfaces with the system reset.

Applications

The PCA9564 is suitable for a variety of applications where an I2C-bus interface is required. It is particularly useful in environments where there are multiple I2C devices or when the primary microcontroller lacks I2C capabilities. Its uses span across industrial control, consumer electronics, and telecommunications, among others.

Package Options and Temperature Range

The PCA9564 comes in a variety of packages, including SOIC, TSSOP, and HVQFN, providing flexibility for different PCB layouts and space constraints. It is also designed to operate over an industrial temperature range, ensuring reliability and performance under varying environmental conditions.

With its robust feature set and ease of integration, the NXP PCA9564 is an ideal solution for expanding the communication capabilities of microcontroller-based systems, enabling designers to take advantage of the simplicity and efficiency of the I2C-bus protocol.