Capacitive Touch Controllers
  • SX8663
    • Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output
  • SX8662
    • Capacitive Button Matrix (up to 36) Controller with Individual LED Drivers and Buzzer Output
  • SX8661
    • Low Power, Capacitive Button Touch and Proximity Controller (8 sensors) with LED Drivers and Analog Output
  • SX8660
    • Ultra Low Power, Capacitive Button Touch Controller (8 sensors) with Enhanced LED Drivers and Analog
  • SX8649
    • Ultra Low Power, Capacitive Button and Wheel Touch Controller (8 sensors) with Enhanced LED Drivers
  • SX8648
    • Ultra Low Power, Capacitive Button and Slider Touch Controller (8 sensors) with Enhanced LED Drivers
  • SX8647
    • Ultra Low Power, Capacitive Wheel Touch Controller (8 sensors) with Enhanced LED Drivers
  • SX8645
    • Ultra Low Power, Capacitive Button and Wheel Touch Controller (12 sensors) with Enhanced LED Drivers
Semtech SX8646

Semtech SX8646

Ultra Low Power, Capacitive Button Touch Controller (8 sensors) with Enhanced LED Drivers

The SX8646 is an ultra low power, fully integrated 8- channel solution for capacitive touch-buttons and applications. Unlike many capacitive touch solutions, the SX8646 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO).

Features


  • Complete eight Sensors Capacitive Touch Controller for
    • Buttons
      • Pre-configured for eight Buttons
      • Eight LED Drivers with Individual Intensity, Fading
      • Control and Autolight Mode
      • 256 steps PWM Linear and Logarithmic control
  • 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

  • SX8646I05AULTRT