PCA9539PW/Q900,118 datasheet by NXP Semiconductors

PCA9539PW/Q900,118 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9539PW/Q900,118 can support?
  The PCA9539PW/Q900,118 can support I2C bus frequencies up to 400 kHz.
• How many external interrupts can the PCA9539PW/Q900,118 handle?
  The PCA9539PW/Q900,118 can handle up to 16 external interrupts.
• What is the maximum current that the PCA9539PW/Q900,118 can sink or source per output?
  The PCA9539PW/Q900,118 can sink or source up to 25 mA per output.
• Can the PCA9539PW/Q900,118 be used in a 5V system?
  Yes, the PCA9539PW/Q900,118 is 5V tolerant, but it operates at a maximum voltage of 3.6V. It can be used in a 5V system with proper level shifting.
• How does the PCA9539PW/Q900,118 handle overcurrent conditions?
  The PCA9539PW/Q900,118 has built-in overcurrent protection, which limits the output current to prevent damage to the device.