Capacitive Button Matrix IC


Capacitive Button Matrix IC

Capacitive Button Matrix IC

The SX8662 is an ultra low power, fully integrated 12-channel solution for capacitive touch-button matrix applications (up to 36 keys). Unlike many capacitive touch solutions, the SX8662 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO) which can be used to drive up to 36 matrix LEDs (i.e. one per key). Each of the on-chip GPIO/LED driver is equipped with independent PWM source for enhanced visual effect such as dimming, and breathing.

Features
  • Complete Capacitive Touch-Button Solution
  • Up to 36 Matrix Buttons
  • Up to 36 LEDs Control for individual Visual Feedback with Auto Lightening
  • Configurable Single or Continuous Fading Mode
  • 256 steps PWM Linear and Logarithmic control
  • High Resolution Capacitive Sensing
  • Up to 100pF of Offset Cap. Compensation at Full Sensitivity
  • Capable of Sensing up thru 5mm thick Overlay Materials
  • Support of buzzer for audible feedback
  • User-selectable Button Reporting Configuration
  • Extremely Low Power
  • 8uA (typ) in Sleep Mode
  • 100uA (typ) in Doze Mode (195ms)
  • 460uA (typ) in Active Mode (30ms)
  • Programmable Scanning Period from 15ms to several seconds
  • 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
  • No External Components per Sensor Input
  • Internal Clock Requires No External Components
  • Differential Sensor Sampling for Reduced EMI
  • Optional 400 KHz I²C Interface with Programmable Address
  • -40°C to +85°C Operation
Applications
  • Home Automation
  • White Goods
  • Printers
  • Notebook/Netbook/Portable/Handheld computers
  • Consumer Products, Instrumentation, Automotive
  • Mechanical Button Replacement
  • Packaging
  • MLPQ-W32
  • Order Codes
  • SX8662I08AWLTRT – Lead Free, RoHS/WEEE compliant and Halogen Free

Sorry, comments are closed!