PCA9545AD,112 datasheet by NXP Semiconductors

PCA9545AD,112 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9545AD,112 can support?
  The PCA9545AD,112 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 the PCA9545AD,112 to switch between multiple I2C buses with different voltage levels?
  Yes, the PCA9545AD,112 can switch between multiple I2C buses with different voltage levels, but the voltage on the SCL and SDA pins must not exceed the VCC supply voltage of the device.
• How do I ensure that the PCA9545AD,112 switches correctly between the different I2C buses?
  To ensure correct switching, make sure to follow the recommended switching sequence in the datasheet, and use the EN pin to enable or disable the switch. Also, ensure that the I2C bus is idle before switching to a new bus.
• What is the maximum capacitance that the PCA9545AD,112 can drive on the I2C bus?
  The PCA9545AD,112 can drive up to 400 pF of capacitance on the I2C bus, but it's recommended to limit the capacitance to 100 pF for reliable operation.
• Can I use the PCA9545AD,112 to switch between I2C buses with different clock stretching requirements?
  Yes, the PCA9545AD,112 can switch between I2C buses with different clock stretching requirements, but the device may not be able to handle extreme clock stretching scenarios.