PCA9691BS/1,118 datasheet by NXP Semiconductors

PCA9691BS/1,118 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9691BS/1,118 can support?
  The PCA9691BS/1,118 can support I2C bus frequencies up to 400 kHz, but it's recommended to operate at 100 kHz or 400 kHz to ensure compatibility with most I2C devices.
• How do I configure the PCA9691BS/1,118 for 8-bit or 16-bit I/O port expansion?
  The PCA9691BS/1,118 can be configured for 8-bit or 16-bit I/O port expansion by setting the A0 and A1 address pins. For 8-bit mode, tie A0 and A1 to GND, and for 16-bit mode, tie A0 to VCC and A1 to GND.
• What is the maximum current that the PCA9691BS/1,118 can sink or source per I/O pin?
  The PCA9691BS/1,118 can sink or source up to 25 mA per I/O pin, but it's recommended to limit the current to 10 mA per pin to ensure reliable operation.
• How do I reset the PCA9691BS/1,118?
  The PCA9691BS/1,118 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 PCA9691BS/1,118 with 3.3V or 5V logic levels?
  Yes, the PCA9691BS/1,118 is compatible with both 3.3V and 5V logic levels, making it suitable for use in a wide range of applications.