The NXP PCA9541AD/03+112 is a highly versatile I²C-bus multiplexer that provides the capability to switch between two different I²C-bus master devices. It is an essential component for systems requiring multiple I²C masters to communicate with a single I²C slave device, or when there is a need to resolve I²C bus address conflicts between devices.

Key Features

• 2-Channel Multiplexing: The PCA9541AD/03+112 allows two masters to access a single slave device, effectively managing bus contention and enabling complex I²C communication scenarios.
• High-Speed Interface: With support for fast-mode I²C-bus (400 kHz) and high-speed mode (3.4 MHz), this multiplexer can handle the demands of high-speed data transfer.
• Low Standby Current: The device's low standby current makes it suitable for power-sensitive applications, ensuring minimal power consumption when not actively switching.
• Channel Selection: Channel selection is determined by the state of the select pin, offering a simple and effective way to switch between I²C masters.
• Interrupt Function: An interrupt input pin for each channel allows the multiplexer to notify the master device of events on the I²C bus, enhancing system responsiveness.

Applications

The PCA9541AD/03+112 is ideal for a variety of applications that require multiple I²C masters, such as:

• Redundant and fail-safe systems
• Advanced telecommunication systems
• Server and storage systems with multiple processors/controllers
• Industrial control systems
• Multi-master sensor systems

Technical Specifications

The device operates over a supply voltage range of 2.3V to 5.5V, making it compatible with a wide array of I²C-bus interfaces. It is available in a small 16-pin TSSOP package, providing a compact solution for space-constrained applications.

Ordering Information

The NXP PCA9541AD/03+112 is available for order with the specified configuration, ready to meet the demands of sophisticated electronic systems requiring robust I²C multiplexing solutions.