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NXP USA Inc. PCA9546APW,118 Environmental and export classification status description

The PCA9546APW,118 is a CMOS integrated circuit that provides electronic switching of multiple I2C buses. It allows the connection of multiple devices with the same I2C address to a single master I2C bus. - Functions: The primary function of the PCA9546APW,118 is to provide a means of expanding the number of I2C devices that can be connected to a single I2C bus. It acts as a switch, allowing the master I2C bus to communicate with different devices on the various channels. - Applications: This IC is commonly used in applications where multiple I2C devices need to be connected to a single I2C bus, such as in industrial automation, consumer electronics, and automotive systems. It simplifies the design by reducing bus complexity and enabling efficient communication with multiple devices. - Alternative parts: Some alternative parts to the PCA9546APW,118 include the PCA9546APW,112 (similar functionality but with different packaging) and the PCA9546APW,125 (enhanced version with additional features). - Embedded modules: There are no specific embedded modules directly related to the PCA9546APW,118. However, it can be integrated into larger embedded systems where I2C bus communication is required, such as microcontroller-based designs or custom hardware projects. Here are three related Q&A: 1. Can the PCA9546APW,118 be used to connect multiple I2C devices with the same address? No, the PCA9546APW,118 is designed to switch between multiple I2C buses, not to resolve conflicts when multiple devices have the same address. It is best used when each of the connected devices has a unique I2C address. 2. What is the maximum number of channels that can be controlled by the PCA9546APW,118? The PCA9546APW,118 has 4 bidirectional channels, allowing you to switch between up to 4 different I2C buses. 3. Does the PCA9546APW,118 require external pull-up resistors for I2C communication? Yes, the PCA9546APW,118 requires the use of external pull-up resistors connected to the SDA and SCL lines for proper I2C communication. The values of these resistors should correspond to the requirements of the I2C bus specification and the connected devices.