TCA9554DBQR datasheet by Texas Instruments

TCA9554DBQR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the TCA9554DBQR can support?
  The TCA9554DBQR can support I2C bus frequencies up to 400 kHz.
• How do I configure the TCA9554DBQR to operate in 8-bit or 16-bit mode?
  The TCA9554DBQR can be configured to operate in 8-bit or 16-bit mode by setting the MODE pin high or low, respectively, during power-up.
• What is the maximum current that the TCA9554DBQR can sink or source on each I/O pin?
  The TCA9554DBQR can sink or source up to 25 mA of current on each I/O pin.
• How do I reset the TCA9554DBQR?
  The TCA9554DBQR can be reset by pulling the RESET pin low for at least 1 ms.
• What is the purpose of the INT pin on the TCA9554DBQR?
  The INT pin is an active-low interrupt output that is asserted when a change is detected on any of the I/O pins.