PCA9546ADGVR datasheet by Texas Instruments

PCA9546ADGVR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9546ADGVR can support?
  The PCA9546ADGVR can support I2C bus frequencies up to 400 kHz, but it's recommended to limit the frequency to 100 kHz for reliable operation.
• Can I use PCA9546ADGVR to switch between multiple I2C buses with different voltage levels?
  Yes, the PCA9546ADGVR can switch between multiple I2C buses with different voltage levels, but the voltage on the SCL and SDA pins must be within the specified range of 1.65 V to 5.5 V.
• How do I ensure that the PCA9546ADGVR switches correctly between the different I2C buses?
  To ensure correct switching, the control signals (A0, A1, and EN) must be driven by a logic level that is compatible with the VCC supply voltage of the PCA9546ADGVR. Additionally, the control signals must be stable before the I2C bus is accessed.
• What is the maximum capacitance that can be driven by the PCA9546ADGVR on the I2C bus?
  The PCA9546ADGVR can drive a maximum capacitance of 400 pF on the I2C bus. Exceeding this limit may cause signal distortion and affect the reliability of the I2C bus.
• Can I use PCA9546ADGVR in a hot-swappable I2C bus application?
  Yes, the PCA9546ADGVR can be used in a hot-swappable I2C bus application, but it's essential to ensure that the power supply to the device is stable and that the control signals are properly driven during the hot-swap event.