Features
• Number of Keys:
   – One, toggle mode (touch-on/touch-off), plus programmable auto-off delay and external cancel
   – Configurable as either a single key or a proximity sensor
• Technology:
   – Patented spread-spectrum charge-transfer (direct mode)
• Key outline sizes:
   – 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible
• Electrode design:
   – Solid or ring electrode shapes
• PCB Layers required:
   – One
• Electrode materials:
   – Etched copper, silver, carbon, Indium Tin Oxide (ITO)
• Electrode substrates:
   – PCB, FPCB, plastic films, glass
• Panel materials:
   – Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
• Panel thickness:
   – Up to 12 mm glass, 6 mm plastic (electrode size and Cs dependent)
• Key sensitivity:
   – Settable via external capacitor (Cs)
• Interface:
   – Digital output, active high or active low (hardware configurable)
• Moisture tolerance:
   – Good
• Power:
   – 1.8V ~ 5.5V; 32 µA at 1.8V
• Package:
   – 6-pin SOT23-6 (3 x 3 mm) RoHS compliant
   – 8-pin UDFN/USON (2 x 2 mm) RoHS compliant
• Signal processing:
   – Self-calibration, auto drift compensation, noise filtering