PCA9555PWE4 datasheet by Texas Instruments

PCA9555PWE4 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9555PWE4 can support?
  The PCA9555PWE4 can support I2C bus frequencies up to 400 kHz.
• Can the PCA9555PWE4 be used as a level shifter?
  Yes, the PCA9555PWE4 can be used as a level shifter, as it has a separate VCC pin for the input/output voltage, allowing it to translate signals between different voltage levels.
• How do I reset the PCA9555PWE4?
  The PCA9555PWE4 can be reset by pulling the RESET pin low for a minimum of 1 ms. This will reset the device to its default state.
• What is the maximum current that the PCA9555PWE4 can sink/source on each I/O pin?
  The PCA9555PWE4 can sink/source up to 25 mA on each I/O pin.
• Can the PCA9555PWE4 be used in a hot-swappable application?
  Yes, the PCA9555PWE4 can be used in a hot-swappable application, as it has built-in power-up and power-down sequencing to prevent bus conflicts and ensure safe insertion and removal of cards.