特性

• Operating Power-Supply Voltage Range of
  1.65 V to 5.5 V
• Allows Bidirectional Voltage-Level Translation and
  GPIO Expansion Between
  • 1.8-V SCL/SDA and 1.8-V, 2.5-V,
    3.3-V, or 5-V P Port
  • 2.5-V SCL/SDA and 1.8-V, 2.5-V,
    3.3-V, or 5-V P Port
  • 3.3-V SCL/SDA and 1.8-V, 2.5-V,
    3.3-V, or 5-V P Port
  • 5-V SCL/SDA and 1.8-V, 2.5-V,
    3.3-V, or 5-V P Port
• I²C to Parallel Port Expander
• Low Standby Current Consumption of 1 μA
• Schmitt-Trigger Action Allows Slow Input Transition and
  Better Switching Noise Immunity at the SCL and SDA Inputs
  • V_hys = 0.18 V Typ at 1.8 V
  • V_hys = 0.25 V Typ at 2.5 V
  • V_hys = 0.33 V Typ at 3.3 V
  • V_hys = 0.5 V Typ at 5 V
• 5-V Tolerant I/O Ports
• Active-Low Reset (RESET) Input
• Open-Drain Active-Low Interrupt (INT) Output
• 400-kHz Fast I²C Bus
• Input/Output Configuration Register
• Polarity Inversion Register
• Internal Power-On Reset