PCA9549PW datasheet by NXP Semiconductors

PCA9549PW Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9549PW can handle?
  The PCA9549PW can handle 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 PCA9549PW to switch between multiple I2C buses with different voltage levels?
  Yes, the PCA9549PW is a voltage-level translator, and it can switch between multiple I2C buses with different voltage levels, as long as the voltage levels are within the specified range of 1.8 V to 5.5 V.
• How do I ensure that the PCA9549PW switches correctly between the different I2C buses?
  To ensure correct switching, make sure to follow the recommended switching sequence and timing in the datasheet, and use the correct control signals (EN, SCL, and SDA) to select the desired I2C bus.
• What is the maximum capacitance of the I2C bus that the PCA9549PW can drive?
  The PCA9549PW can drive I2C buses with capacitance up to 400 pF, but it's recommended to limit the capacitance to 100 pF for reliable operation.
• Can I use the PCA9549PW to switch between I2C buses with different clock stretching requirements?
  Yes, the PCA9549PW can handle I2C buses with different clock stretching requirements, as it has a built-in clock stretching mechanism that allows it to adapt to different clock stretching requirements.