PCA9546ARGYR datasheet by Texas Instruments

PCA9546ARGYR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9546ARGYR can support?
  The PCA9546ARGYR can support I2C bus frequencies up to 400 kHz, but it's recommended to limit the frequency to 100 kHz for reliable operation.
• How do I configure the PCA9546ARGYR for 1.8V or 3.3V operation?
  The PCA9546ARGYR is a voltage-tolerant device and can operate from 1.65V to 5.5V. To configure it for 1.8V or 3.3V operation, simply connect the VCC pin to the desired voltage supply, and ensure that the input signals are within the specified voltage range.
• What is the maximum capacitance of the I2C bus that the PCA9546ARGYR can drive?
  The PCA9546ARGYR can drive I2C bus capacitances up to 400 pF, but it's recommended to limit the capacitance to 200 pF for reliable operation.
• How do I reset the PCA9546ARGYR?
  The PCA9546ARGYR does not have a dedicated reset pin. However, you can reset the device by cycling the power supply or by sending a STOP condition on the I2C bus.
• Can I use the PCA9546ARGYR as a level shifter?
  Yes, the PCA9546ARGYR can be used as a level shifter. It can translate I2C bus signals from one voltage domain to another, allowing you to interface devices with different voltage requirements.