PCA9546ADT datasheet by Texas Instruments

PCA9546ADT Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9546ADT can support?
  The PCA9546ADT 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 PCA9546ADT to connect multiple I2C buses with different voltage levels?
  Yes, the PCA9546ADT 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 PCA9546ADT switches correctly between the two I2C buses?
  To ensure correct switching, make sure to use the EN (enable) pin to control the switch, and use the SCL (clock) and SDA (data) pins to connect the two I2C buses. Also, ensure that the voltage levels of the two buses are within the recommended operating range.
• What is the maximum capacitance of the I2C bus that PCA9546ADT can drive?
  The PCA9546ADT 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 PCA9546ADT to connect I2C buses with different clock frequencies?
  Yes, the PCA9546ADT can connect I2C buses with different clock frequencies, but it's recommended to ensure that the clock frequency of the slave device is within the recommended operating range of the PCA9546ADT.