Features • Configurations: – Can be configured as a combination of keys and input/output lines • Number of Keys: – 2 to 6 • Number of I/O Lines: – 7, configurable for input or output, with PWM control for LED driving • 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 • Layers Required: – One • Electrode Materials: – Etched copper – Silver – Carbon – Indium Tin Oxide (ITO) • Panel Materials: – Plastic – Glass – Composites – Painted surfaces (low particle density metallic paints possible) • Panel Thickness: – Up to 10 mm glass (electrode size dependent) – Up to 5 mm plastic (electrode size dependent) • Key Sensitivity: – Individually settable via simple commands over serial interface • Interface: – I2C-compatible slave mode (100 kHz). Discrete detection outputs • Power: – 1.8V to 5.5V • Package: – 28-pin 4 x 4 mm MLF RoHS compliant IC • Signal Processing: – Self-calibration – auto drift compensation – noise filtering – Adjacent Key Suppression™ • Applications: – Mobile appliances
