The PCA9542AD-T is a versatile I2C-bus multiplexer designed by NXP Semiconductors that provides two selectable bidirectional translating switches. It allows multiple I2C devices with the same address to be connected to a single I2C bus, effectively resolving address conflicts and expanding the range of compatible peripherals. This component is particularly useful in complex systems where multiple identical sensors or devices need to communicate with a single microcontroller or processor.

Key Features:

• Channel Selection: The PCA9542AD-T enables connection to two I2C-bus channels via an active LOW channel select input.
• Level Shifting: The device can shift I2C-bus voltages, allowing for the interfacing of devices operating at different voltage levels.
• Low Standby Current: It features a low standby current, making it suitable for power-sensitive applications.
• Interrupt Functionality: Each channel has an interrupt input which can be used to alert the master when a device on the bus requires attention.
• Compatibility: The PCA9542AD-T is fully compatible with I2C-bus specification and provides serial, 8-bit oriented, bidirectional data transfers.

Applications:

The PCA9542AD-T is ideal for a wide range of applications, including:

• Server systems and data centers
• Industrial control systems
• Telecommunications equipment
• Consumer electronics
• Automotive networks

Technical Specifications:

The PCA9542AD-T operates over a supply voltage range of 2.5V to 5.5V and is available in a compact 20-pin TSSOP package. It supports hot insertion and features a built-in oscillator that requires no external components. This I2C multiplexer is also equipped with an active LOW reset input, which resets the I2C-bus state without depowering the system.

Ordering Information:

The product is offered in a tape and reel packaging, facilitating its use in automated manufacturing environments. For detailed product specifications and ordering information, please refer to the official NXP datasheets or contact your local NXP sales office.