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STMicroelectronics' STMPE16M31PX capacitive touch-key controller with proximity sensing

The STMPE16M31PX is the latest addition to the S-Touch® family of STMicroelectronics' touch-sense controllers. In line with the existing STMPE16M31, the STMPE16M31PX offers highly flexible and robust capacitive touch-key performance over 16 channels, with the addition of a powerful proximity sensor. The proximity sensing is achieved by increasing the sensitivity of one selected channel among the 16 available, using a dithering technique. The dithering factor is configurable from 4 to 32 x and determines the sensitivity of the proximity sensor. The controller allows proximity sensing up to a distance of 2 inches. All STMPExxM31 touch controllers feature automatic calibration and auto-tuning, high noise immunity and sensitivity, eight independent PWM controllers (that can be routed to one or more of any of the 16 GPIOs) and extremely low current consumption, achieving best in class performance in capacitive touch-key and proximity sensing. STMicroelectronics STMPE16M31PX

  • 60 pF dynamic range with external Cref
  • 8 kv HBM ESD protection on sensing pins
  • 12 mA sourcing/sinking on GPIOs for LED driving
  • Operating temperature range: -40°C to +85°C
  • Proximity sensing capability up to 2 inches (5 cm)
  • 16 configurable channels: capacitive sensors, GPIOs
  • Operating voltage range: 2.7 – 5.5 V (VIO)
  • 8 independent configurable PWM controllers, up to 16 PWM outputs
  • QFN32 (4x4 mm)
  • Automatic calibration
  • 15 fF resolution, 512 steps
  • Host I2C™ Interface (400 kHz)
  • 30 pF tuning-free dynamic range
  • Low power consumption:
    • 300 uA in active mode
    • 40 uA in sleep mode (wake on touch)
    • 5 uA in hibernate

  • Laptop & netbooks
  • Printers and keyboards
  • Portable healthcare
  • STBs, DVD players
  • Digital cameras
  • Home appliances
  • Medical equipment
  • TVs, monitors & displays
  • Portable multimedia players, mobile phones

Digi-Key P/N Manufactures P/N Description  
497-10738-1-ND STMPE16M31PXQTR IC CTLR TOUCHKEY 16CHAN 32-QFN Datasheet
Available in Tape & Reel (2-ND), Cut Tape (1-ND), and custom Digi-Reel® (6-ND)