PCA9548APWR datasheet by Texas Instruments

PCA9548APWR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9548APWR can support?
  The PCA9548APWR can support I2C bus frequencies up to 400 kHz, but it's recommended to operate at 100 kHz or lower for reliable operation.
• Can I use PCA9548APWR as a level shifter for I2C signals?
  Yes, the PCA9548APWR can be used as a level shifter for I2C signals, allowing you to translate between different voltage levels (e.g., 1.8V to 3.3V or 5V).
• How do I configure the PCA9548APWR for multi-master I2C bus operation?
  To configure the PCA9548APWR for multi-master I2C bus operation, you need to connect the INT pin to the interrupt input of the microcontroller, and use the I2C bus arbitration mechanism to resolve bus contention.
• What is the maximum capacitance of the I2C bus that PCA9548APWR can drive?
  The PCA9548APWR can drive I2C bus capacitances up to 400 pF, but it's recommended to keep the bus capacitance as low as possible to ensure reliable operation.
• Can I use PCA9548APWR to extend the distance of the I2C bus?
  Yes, the PCA9548APWR can be used to extend the distance of the I2C bus by repeating the signals and providing a buffer stage, allowing you to increase the bus length while maintaining signal integrity.