SX8662

SX8662 Capacitive Button Matrix (up to 36) Controller with Individual LED Drivers and Buzzer Output ADVANCED COMMUNICATIONS & SENSING GENERAL DESCRIPTION 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. The SX8662 includes a capacitive 10 bit ADC analog interface with automatic compensation up to 100pF. The high resolution capacitive sensing supports a wide variety of touch pad sizes and shapes and allows capacitive buttons to be created using thick overlay materials (up to 5mm) for an extremely robust and ESD immune system design. The SX8662 incorporates a versatile firmware that was specially designed to simplify capacitive touch solution design and offers reduced time-to-market. Integrated multi-time programmable memory provides the ultimate flexibility to modify key firmware parameters (gain, threshold, scan period, auto offset compensation) in the field without the need for new firmware development. The SX8662 supports the 400 kHz I²C serial bus data protocol and includes a field programmable slave addr...