特性

• Operating Power-Supply Voltage Range of 1.65?V to 3.6?V
• Supports QWERTY Keypad Operation Plus GPIO Expansion
• 18 GPIOs Can Be Configured into Eight Inputs and Ten Outputs to
  Support an 8 × 10 Keypad Array (80 Buttons)
• ESD Protection Exceeds JESD 22 on all 18 GPIO Pins and non GPIO pins
  • 2000-V Human Body Model (A114-A)
  • 1000-V Charged Device Model (C101)
• Low Standby (Idle) Current Consumption: 3 μA
• Polling Current Drain 70 μA for One Key Pressed
• 10 Byte FIFO to Store 10 Key Presses and Releases
• Supports 1-MHz Fast Mode Plus I²C Bus
• Open-Drain Active-Low Interrupt Output, Asserted when Key is
  Pressed and Key is Released
• Minimum Debounce Time of 50 μs
• Schmitt-Trigger Action Allows Slow Input Transition and
  Better Switching Noise Immunity at the SCL and SDA Inputs:
  Typical V_hys at 1.8 V is 0.18 V
• Latch-Up Performance Exceeds 200 mA Per JESD 78, Class II
• Very Small Packages
  • WCSP (YFP): 2 mm × 2 mm; 0.4 mm pitch
  • QFN (RTW): 4 mm × 4 mm; 0.5 mm pitch
• APPLICATIONS
  • Smart Phones
  • PDAs