PCF8576T datasheet by Philips Semiconductors

PCF8576T Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCF8576T can handle?
  The PCF8576T can handle I2C bus frequencies up to 400 kHz, but it's recommended to use a maximum frequency of 100 kHz for reliable operation.
• How do I reset the PCF8576T?
  The PCF8576T can be reset by pulling the SCL line low for at least 10 ms. This will reset the device and set all outputs to a high-impedance state.
• What is the maximum current that can be sourced or sunk by each I/O pin?
  Each I/O pin of the PCF8576T can source or sink up to 25 mA of current. However, the total current sourced or sunk by all I/O pins should not exceed 100 mA.
• Can I use the PCF8576T as a level shifter?
  Yes, the PCF8576T can be used as a level shifter. It can translate I2C signals from a lower voltage domain (e.g., 1.8V) to a higher voltage domain (e.g., 5V) or vice versa.
• How do I handle bus contention when multiple masters are accessing the PCF8576T?
  To handle bus contention, use an I2C bus arbiter or a multiplexer to ensure that only one master can access the PCF8576T at a time. Alternatively, use a collision detection mechanism to detect and resolve bus contention.