PCA9535DBQR datasheet by Texas Instruments

PCA9535DBQR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9535DBQR can support?
  The PCA9535DBQR can support I2C bus frequencies up to 400 kHz.
• How do I configure the PCA9535DBQR to use an external pull-up resistor?
  To use an external pull-up resistor, connect the resistor between the SCL/SDA pins and the VCC pin. The recommended value is 1 kΩ to 10 kΩ.
• What is the maximum current that the PCA9535DBQR can sink or source per output pin?
  The PCA9535DBQR can sink or source up to 25 mA per output pin.
• How do I reset the PCA9535DBQR?
  The PCA9535DBQR can be reset by pulling the RESET pin low for at least 1 ms. This will reset the device to its default state.
• Can I use the PCA9535DBQR with a 5V power supply?
  No, the PCA9535DBQR is designed to operate with a 1.65V to 3.6V power supply. Using a 5V power supply may damage the device.