PCA9535APW datasheet by NXP Semiconductors

PCA9535APW Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9535APW can support?
  The PCA9535APW can support I2C bus frequencies up to 400 kHz, but it is recommended to operate at 100 kHz or lower for reliable operation.
• How do I reset the PCA9535APW?
  The PCA9535APW 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 PCA9535APW can sink or source on each output pin?
  The PCA9535APW can sink or source up to 25 mA on each output pin, but it is recommended to limit the current to 10 mA or less to ensure reliable operation.
• Can I use the PCA9535APW as a level translator?
  Yes, the PCA9535APW can be used as a level translator between 1.8 V and 5 V logic levels. However, it is recommended to use an external voltage regulator to ensure stable operation.
• How do I configure the PCA9535APW for open-drain or push-pull output mode?
  The PCA9535APW can be configured for open-drain or push-pull output mode by writing to the Output Mode Register (OMR). A value of 0 sets the output to open-drain mode, while a value of 1 sets the output to push-pull mode.