PCA9564D datasheet by NXP Semiconductors

PCA9564D Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for PCA9564D to minimize EMI?
  NXP provides a recommended PCB layout in the application note AN11588, which includes guidelines for component placement, routing, and grounding to minimize EMI.
• How do I configure the PCA9564D for I2C bus stretching?
  To configure the PCA9564D for I2C bus stretching, set the STB pin high and ensure that the clock stretching is enabled in the device's control register. Refer to the datasheet section 8.3.1 for more details.
• What is the maximum cable length supported by PCA9564D?
  The maximum cable length supported by PCA9564D depends on the clock frequency and the capacitance of the bus. As a general guideline, NXP recommends a maximum cable length of 10 meters for a 400 kHz clock frequency. However, this can be extended up to 20 meters with proper termination and bus design.
• How do I troubleshoot I2C bus issues with PCA9564D?
  To troubleshoot I2C bus issues with PCA9564D, use a logic analyzer or oscilloscope to monitor the SCL and SDA signals. Check for signal integrity, clock stretching, and bus contention. Also, ensure that the device is properly powered and configured, and that the I2C bus is properly terminated.
• Can I use PCA9564D with a 5V power supply?
  No, PCA9564D is designed to operate with a 3.3V power supply. Using a 5V power supply may damage the device or affect its performance. Ensure that the power supply voltage is within the recommended range of 3.0V to 3.6V.