PCF8574RGYR datasheet by Texas Instruments

PCF8574RGYR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCF8574RGYR can support?
  The PCF8574RGYR can support I2C bus frequencies up to 400 kHz.
• Can the PCF8574RGYR be used as a level shifter?
  Yes, the PCF8574RGYR can be used as a level shifter, as it can translate I2C bus signals from one voltage level to another.
• How do I handle the reset pin (RST) of the PCF8574RGYR?
  The reset pin (RST) of the PCF8574RGYR should be tied to VCC through a pull-up resistor to ensure proper operation. A 10 kΩ resistor is recommended.
• What is the maximum capacitance that can be driven by the PCF8574RGYR?
  The PCF8574RGYR can drive capacitive loads up to 400 pF.
• Can the PCF8574RGYR be used in a multi-master I2C bus configuration?
  Yes, the PCF8574RGYR can be used in a multi-master I2C bus configuration, but it requires additional external circuitry to handle arbitration and collision detection.