PCAL6408AEXX datasheet by NXP Semiconductors

PCAL6408AEXX Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for PCAL6408AEXX?
  The recommended operating voltage range for PCAL6408AEXX is 1.65V to 5.5V, as specified in the datasheet. However, it's recommended to operate the device within the 1.8V to 3.6V range for optimal performance and power consumption.
• How do I configure the I2C bus speed for PCAL6408AEXX?
  The PCAL6408AEXX supports standard I2C bus speeds up to 400 kHz. To configure the bus speed, you need to set the SCL clock frequency accordingly. For example, for a 400 kHz bus speed, the SCL clock frequency should be set to 400 kHz.
• What is the maximum current rating for the GPIO pins of PCAL6408AEXX?
  The maximum current rating for the GPIO pins of PCAL6408AEXX is 4 mA per pin. However, it's recommended to limit the current to 2 mA per pin to ensure reliable operation and prevent overheating.
• Can I use PCAL6408AEXX as a level translator between different voltage domains?
  Yes, PCAL6408AEXX can be used as a level translator between different voltage domains. The device supports voltage translation between 1.8V, 2.5V, 3.3V, and 5V domains, making it suitable for use in mixed-voltage systems.
• How do I reset the PCAL6408AEXX device?
  The PCAL6408AEXX device can be reset by pulling the RESET pin low for a minimum of 1 ms. This will reset the device to its default state and clear all internal registers.