PCA9543AD datasheet by Texas Instruments

PCA9543AD Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9543AD can support?
  The PCA9543AD 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 PCA9543AD as a level shifter for I2C signals?
  Yes, the PCA9543AD can be used as a level shifter for I2C signals, allowing you to interface devices with different voltage levels.
• How do I configure the PCA9543AD to work in dual-bus mode?
  To configure the PCA9543AD in dual-bus mode, you need to connect the EN pin to VCC, and then use the A0 and A1 pins to select one of the four possible bus configurations.
• What is the maximum capacitance of the I2C bus that PCA9543AD can drive?
  The PCA9543AD can drive I2C buses with capacitances up to 400 pF, but it's recommended to limit the capacitance to 200 pF for reliable operation.
• Can I use PCA9543AD to isolate two I2C buses with different voltage levels?
  Yes, the PCA9543AD provides electrical isolation between the two I2C buses, allowing you to isolate devices with different voltage levels.