PCF1251P datasheet by Philips Semiconductors

PCF1251P Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for PCF1251P?
  The recommended operating voltage range for PCF1251P is 2.5V to 5.5V, although it can operate down to 2.0V with reduced performance.
• How do I ensure reliable communication with the PCF1251P?
  To ensure reliable communication, use a pull-up resistor on the SCL line, keep the clock frequency below 400 kHz, and avoid bus contention by using a single master device.
• What is the maximum clock frequency for the PCF1251P?
  The maximum clock frequency for the PCF1251P is 400 kHz, but it can be operated at higher frequencies with reduced reliability and increased power consumption.
• How do I handle multiple PCF1251P devices on the same I2C bus?
  To handle multiple PCF1251P devices on the same I2C bus, use a unique address for each device by connecting the A0, A1, and A2 pins to VCC or GND, and use the I2C bus protocol to address each device individually.
• What is the power consumption of the PCF1251P in standby mode?
  The power consumption of the PCF1251P in standby mode is typically around 1 μA, making it suitable for battery-powered applications.