PCA9542AD,112 datasheet by NXP Semiconductors

PCA9542AD,112 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9542AD,112 can support?
  The PCA9542AD,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 PCA9542AD,112 to switch between multiple I2C buses with different voltage levels?
  Yes, the PCA9542AD,112 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 1.8 V to 5.5 V.
• How do I ensure that the PCA9542AD,112 switches correctly between the different I2C buses?
  To ensure correct switching, you need to send the correct control byte to the PCA9542AD,112, which includes the channel selection and the enable/disable bit. You can find the control byte format in the datasheet.
• What is the maximum capacitance of the I2C bus that the PCA9542AD,112 can drive?
  The PCA9542AD,112 can drive I2C buses with a maximum capacitance of 400 pF. Exceeding this limit may affect the signal integrity and reliability.
• Can I use the PCA9542AD,112 to switch between I2C buses with different clock stretching requirements?
  Yes, the PCA9542AD,112 can switch between I2C buses with different clock stretching requirements. The device will automatically adapt to the clock stretching requirements of the selected bus.