PCA9952TW,118 datasheet by NXP Semiconductors

PCA9952TW,118 Frequently Asked Questions (FAQs)

• What is the maximum current that the PCA9952TW,118 can sink or source per output?
  The PCA9952TW,118 can sink or source up to 10mA per output, but it's recommended to limit the current to 5mA per output to ensure reliable operation.
• How do I ensure that the PCA9952TW,118 is properly powered and reset during startup?
  To ensure proper power-up and reset, make sure to follow the recommended power-up sequence in the datasheet, and use a 0.1uF capacitor between VCC and GND to filter out noise. Also, connect a 10kΩ pull-up resistor to the RESET pin to ensure a clean reset signal.
• Can I use the PCA9952TW,118 to drive LEDs directly, or do I need an external driver?
  The PCA9952TW,118 can drive LEDs directly, but it's recommended to use an external driver or resistor to limit the current and ensure reliable operation, especially if you're using high-brightness LEDs.
• How do I configure the PCA9952TW,118 to operate in 16-bit mode?
  To configure the PCA9952TW,118 to operate in 16-bit mode, set the MODE pin high during power-up or reset. You can also use the I2C interface to configure the device to operate in 16-bit mode by writing to the MODE register.
• What is the maximum frequency of the I2C interface on the PCA9952TW,118?
  The maximum frequency of the I2C interface on the PCA9952TW,118 is 400 kHz, but it's recommended to operate at a lower frequency (e.g., 100 kHz) to ensure reliable communication.