Novinka:TI: TCA8418 - I2C radič klávesnice
(Kategória: Semiconductor-ZONE)
Zaslal EdizonTN
30.10.2009-13:21

  • 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 Vhys 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


CAD_INT pin is included to indicate the detection of CTRL-ALT-DEL (i.e., 1, 11, 21) key press action (YFP package).

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