PCA9546AD datasheet by Texas Instruments

PCA9546AD Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9546AD can support?
  The PCA9546AD 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 PCA9546AD to work with multiple masters on the same bus?
  To configure the PCA9546AD for multiple masters, connect the SCL and SDA pins of each master to the corresponding pins on the PCA9546AD. Then, use the EN pin to enable or disable the switch for each master.
• What is the maximum capacitance that the PCA9546AD can drive?
  The PCA9546AD can drive up to 400 pF of capacitance on the bus, but it's recommended to limit the capacitance to 200 pF for reliable operation.
• Can I use the PCA9546AD to switch between two different I2C buses?
  Yes, the PCA9546AD can be used to switch between two different I2C buses. Simply connect the SCL and SDA pins of each bus to the corresponding pins on the PCA9546AD, and use the EN pin to select which bus is active.
• How do I ensure that the PCA9546AD is properly powered?
  The PCA9546AD requires a power supply voltage (VCC) between 1.65 V and 5.5 V. Ensure that the power supply is stable and within the recommended range to ensure proper operation.