PCA9541AD/01,118 datasheet by NXP Semiconductors

PCA9541AD/01,118 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9541 can handle?
  The PCA9541 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 PCA9541 to switch between multiple I2C masters?
  No, the PCA9541 is designed to switch between multiple I2C buses, not multiple I2C masters. It's intended to allow a single I2C master to access multiple I2C buses.
• How do I ensure that the PCA9541 switches correctly between the different I2C buses?
  To ensure correct switching, make sure to follow the recommended switching sequence outlined in the datasheet, and use the correct control signals (SCL0, SCL1, etc.) to select the desired bus.
• What is the maximum capacitance of the I2C bus that the PCA9541 can drive?
  The PCA9541 can drive I2C buses with capacitances up to 400 pF, but it's recommended to keep the bus capacitance as low as possible to ensure reliable operation.
• Can I use the PCA9541 to isolate I2C buses with different voltage levels?
  Yes, the PCA9541 can be used to isolate I2C buses with different voltage levels, but make sure to follow the recommended voltage levels and interface requirements outlined in the datasheet.