PCA9536D datasheet by Texas Instruments

PCA9536D Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9536D can support?
  The PCA9536D can support I2C bus frequencies up to 400 kHz.
• How do I configure the PCA9536D to use an external pull-up resistor?
  To use an external pull-up resistor, connect the resistor between the SCL/SDA pins and VCC. Then, set the PUEN bit in the Configuration Register (address 0x06) to 0 to disable the internal pull-up resistors.
• What is the maximum current that the PCA9536D can sink or source on each output pin?
  The PCA9536D can sink or source up to 25 mA of current on each output pin.
• How do I reset the PCA9536D to its default state?
  To reset the PCA9536D, pull the RESET pin low for at least 1 ms. This will reset the device to its default state.
• Can I use the PCA9536D to drive LEDs or other inductive loads?
  Yes, the PCA9536D can be used to drive LEDs or other inductive loads, but it's recommended to use an external transistor or buffer to handle the high current requirements of the load.