TouchXpress™ Capacitive Touch Controller

TouchXpress capactive touch controllers are designed to quickly replace mechanical buttons with modern capacitive touch buttons. The controllers support up to 13 capacitive sensor inputs and eliminate complex firmware to speed user interface design. The devices are highly-integrated and can include I2C interfaces to the host processor. No firmware development is needed, and all the capacitive touch sense parameters can be configured using a simple GUI-based configurator. 




  • Capacitive sensing input engine with up to 13 inputs
  • Post-sample touch qualification engine
  • Configuration profile space in non-volatile memory
  • Pin output with configurable polarity and drive strength
  • Low power state machine to minimize current draw in all use cases
  • Capacitive proximity sensing input
  • Buzzer output
  • Mutually exclusive touch qualifier
  • Touch time-out timer
  • IEC60730 Class B compliance

Product Matrix

Part Number Data Sheet Dev Kit Channels Interface Slider Wake on Proximity LED/Buzzer Package Type Package Size (mm)
SLEXP8007A 7 GPIO Map No Yes Yes QFN20 3x3
SLEXP8007A 7 GPIO Map No Yes Yes QSOP24 8.65x3.9
SLEXP8008A 12 I2C Yes Yes Yes QFN20 3x3
SLEXP8008A 12 I2C Yes Yes Yes QSOP24 8.65x3.9
SLEXP8018A 12 I2C No Yes Yes QFN20 3x3
SLEXP8019A 13 I2C No No No QFN24 4x4
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