Capacitive Touch Controllers & Proximity Sensing Solutions
  • SX8661Z
  • Low Power, Capacitive Button Touch and Proximity Controller (8 sensors) with LED Drivers and Analog Output
  • SX9300
  • Smart Proximity - Ultra Low Power, Dual Channel SAR Compliant Solution
  • SX9306
  • Ultra Low Power, Smart Proximity Sensor for SAR
  • SX9500
  • Proximity/Button - Ultra Low Power, Capacitive Four (4) - Channel
  • SX8634
  • Low Power, Capacitive Button and Slider Touch Controller (12 sensors) with Enhanced LED Drivers and Proximity Sensing
  • SX8636
  • Low Power, Capacitive Button Touch Controller (8 sensors) with Enhanced LED Drivers and Proximity Sensing
  • SX8661
  • Low Power, Capacitive Button Touch and Proximity Controller (8 sensors) with LED Drivers and Analog Output
  • SX9510
  • 8 Capacitive Buttons, LEDs, IR Decoder and Proximity Controller with Analog Outputs
Semtech SX8639

Semtech SX8639

Low Power, Capacitive Button and Wheel Touch Controller (8 sensors) with Enhanced LED Drivers and Proximity Sensing

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The SX8639 is an ultra low power, fully integrated 8-channel solution for capacitive touch-buttons and wheel with proximity detection applications. Unlike many capacitive touch solutions, the SX8639 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO). Each GPIO is typically configured as LED driver with independent PWM source for enhanced lighting control such as intensity and fading.


Features


  • Complete Eight Sensors Capacitive Touch Controller for Buttons and Wheel
    • Pre-configured for 4 Buttons and a Wheel
    • 8 LED Drivers with Individual Intensity, Fading Control and Autolight Mode
    • 256 steps PWM Linear and Logarithmic control
  • Proximity Sensing up to several centimeters
  • High Resolution Capacitive Sensing
    • Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
    • Capable of Sensing through Overlay Materials up to 5mm thick
  • Extremely Low Power Optimized for Portable Application
    • 8uA (typ) in Sleep Mode
    • 80uA (typ) in Doze Mode (Scanning Period 195ms)
    • 175uA (typ) in Active Mode (Scanning Period 30ms)
  • Programmable Scanning Period from 15ms to 1500ms
  • Auto Offset Compensation
    • Eliminates False Triggers due to Environmental Factors (Temperature, Humidity)
    • Initiated on Power-up and Configurable Intervals
  • Multi-Time In-Field Programmable Firmware Parameters for Ultimate Flexibility
    • On-chip user programmable memory for fast, self contained start-up
  • "Smart" Wake-up Sequence for Easy Activation from Doze
  • No External Components per Sensor Input
  • Internal Clock Requires No External Components
  • Differential Sensor Sampling for Reduced EMI
  • 400 KHz Fast-Mode I²C Interface with Interrupt
  • -40°C to +85°C Operation

Applications


  • Notebook/Netbook/Portable/Handheld computers
  • Cell phones, PDAs
  • Consumer Products, Instrumentation, Automotive
  • Mechanical Button Replacement

Packaging

  • MLPQ-UT28

Order Codes

  • SX8639I05AULTRT - Lead Free RoHS/WEEE compliant and Halogen Free
 
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