PCA82C250T datasheet by NXP Semiconductors

PCA82C250T Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for PCA82C250T?
  The recommended operating voltage range for PCA82C250T is 4.5V to 5.5V, with a typical voltage of 5V.
• How do I ensure reliable communication between the PCA82C250T and the microcontroller?
  To ensure reliable communication, make sure to use a pull-up resistor on the SDA line, and use a clock frequency within the recommended range of 100 kHz to 400 kHz. Also, ensure that the microcontroller and PCA82C250T are properly synchronized.
• What is the maximum current that the PCA82C250T can sink or source?
  The PCA82C250T can sink up to 20mA and source up to 10mA per pin, with a total current limit of 100mA for the entire device.
• How do I handle bus contention and arbitration in a multi-master I2C bus with PCA82C250T?
  To handle bus contention and arbitration, use a multi-master I2C bus protocol that includes arbitration and clock synchronization mechanisms. The PCA82C250T has built-in arbitration logic that can detect and resolve bus contention.
• What is the purpose of the internal pull-up resistors on the PCA82C250T?
  The internal pull-up resistors on the PCA82C250T are used to pull up the SDA and SCL lines to the positive supply voltage when they are not being driven by a master device. This helps to prevent bus floating and ensures reliable communication.