PCA9544ADW datasheet by Texas Instruments

PCA9544ADW Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9544ADW can support?
  The PCA9544ADW 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 PCA9544ADW to connect multiple I2C buses with different voltage levels?
  Yes, the PCA9544ADW is a voltage-level translator, which means it can connect I2C buses with different voltage levels, such as 1.8V, 2.5V, 3.3V, or 5V.
• How do I ensure that the PCA9544ADW switches correctly between the different I2C buses?
  To ensure correct switching, make sure to use the correct control signals (SCL0, SCL1, SDA0, and SDA1) and follow the recommended switching sequence outlined in the datasheet.
• What is the maximum capacitance of the I2C bus that PCA9544ADW can drive?
  The PCA9544ADW 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 PCA9544ADW in a hot-swappable I2C bus application?
  Yes, the PCA9544ADW is designed to support hot-swappable I2C bus applications, but make sure to follow the recommended power-up and power-down sequences to avoid bus conflicts.