PCAL6416AHF datasheet by NXP Semiconductors

PCAL6416AHF Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for PCAL6416AHF?
  The recommended operating voltage range for PCAL6416AHF is 1.65 V to 5.5 V, with a typical voltage of 3.3 V or 5 V.
• How do I configure the PCAL6416AHF for I2C or SMBus interface?
  The PCAL6416AHF can be configured for I2C or SMBus interface by setting the appropriate values for the SCL and SDA pins. For I2C, set SCL to 100 kHz or 400 kHz, and for SMBus, set SCL to 10 kHz or 100 kHz.
• What is the maximum frequency for the PCAL6416AHF?
  The maximum frequency for the PCAL6416AHF is 400 kHz for I2C and 100 kHz for SMBus.
• How do I handle the interrupt output of the PCAL6416AHF?
  The interrupt output of the PCAL6416AHF is an open-drain output, which requires an external pull-up resistor to VCC. The interrupt output is active-low, meaning it is low when an interrupt is generated.
• What is the purpose of the reset pin (RST) on the PCAL6416AHF?
  The reset pin (RST) on the PCAL6416AHF is an active-low input that resets the device when pulled low. It is recommended to connect the RST pin to VCC through a pull-up resistor to ensure proper operation.