PCA9546APW datasheet by Texas Instruments

PCA9546APW Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9546APW can support?
  The PCA9546APW can support I2C bus frequencies up to 400 kHz, but it's recommended to limit the frequency to 100 kHz for reliable operation.
• How do I configure the PCA9546APW to work with multiple masters on the same bus?
  To configure the PCA9546APW for multiple masters, connect the SCL and SDA pins of each master to the corresponding pins on the PCA9546APW. Ensure that each master has a unique address and that the PCA9546APW is properly configured using the A0, A1, and A2 pins.
• What is the maximum capacitance of the bus that the PCA9546APW can drive?
  The PCA9546APW can drive a bus with a maximum capacitance of 400 pF. Exceeding this limit may affect the signal integrity and reliability of the I2C bus.
• Can I use the PCA9546APW to switch between multiple I2C buses with different voltage levels?
  Yes, the PCA9546APW can be used to switch between multiple I2C buses with different voltage levels, but ensure that the voltage levels are within the recommended operating range of 1.65 V to 5.5 V.
• How do I reset the PCA9546APW?
  The PCA9546APW can be reset by pulling the RESET pin low for at least 1 ms. This will reset the device to its default state.