The NXP PA9543A is a high-performance, 4-channel I²C-bus multiplexer designed to provide outstanding flexibility and connectivity for a multi-master I²C-bus system. This advanced multiplexer is an essential component for systems that require multiple I²C devices with the same address to be connected to a single I²C-bus.

Key Features

• Channel Number: The device features 4 bidirectional translating switches that can connect up to four separate I²C-bus slave sub-systems to a main I²C bus.
• Compatibility: It is compatible with I²C-bus and SMBus standards, ensuring seamless integration with existing systems.
• Voltage Level Translation: PA9543A supports voltage level translation between 1.8V, 2.5V, 3.3V, and 5V buses, which allows for a variety of devices to communicate without the risk of voltage mismatches.
• Multi-master Support: It allows multiple masters to communicate with multiple slaves via isolated I²C-bus segments, preventing data collision and bus contention issues.

Applications

The NXP PA9543A is ideal for a wide range of applications, such as:

• Server motherboards and computing systems requiring complex I²C-bus topologies.
• Industrial control systems that need to interface with multiple sensors and actuaries over the same I²C-bus.
• Consumer electronics where multiple I²C devices operate at different voltage levels.

Technical Specifications

• Supply Voltage: 2.3V to 5.5V
• Operating Temperature: -40°C to +85°C
• Package: TSSOP16 and HVQFN16
• Interrupt Support: Interrupt propagation from downstream to upstream I²C-bus, allowing for efficient communication.

The NXP PA9543A I²C Multiplexer is a robust solution for complex I²C-bus systems, ensuring reliable communication and data integrity across multiple devices. It is a testament to NXP's commitment to innovation and quality in the field of integrated circuit design.