PCA9544ABS datasheet by NXP Semiconductors

PCA9544ABS Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9544ABS can handle?
  The PCA9544ABS 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 PCA9544ABS to switch between multiple I2C masters?
  No, the PCA9544ABS 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 PCA9544ABS 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 correct control signals (SCL0, SCL1, SDA0, SDA1) to select the desired bus.
• What is the maximum capacitance of the I2C bus that the PCA9544ABS can drive?
  The PCA9544ABS 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 PCA9544ABS in a hot-swappable application?
  Yes, the PCA9544ABS is designed to support hot-swapping, but you need to ensure that the power supply to the device is stable and that the I2C bus is not active during the switching process.