The STMPE16M31 and STMPE24M31 capacitive touchkey controllers offer highly versatile and flexible capacitive sensing capabilities in one single chip.
The devices integrate up to 24 capacitive sensing channels which are highly sensitive and noise tolerant. Two units of hardwired ratiometric engines enable the implementation of a slider/wheel without external computations. Eight independent PWM controllers allow to control up to 16 LEDs with brightness control, ramping and blinking capabilities.
The I2C interface supports up to 400 kHz communication with the system host. A very wide dynamic range allows most applications to work without hardware tuning. A single STMPE24M31 device can be used to implement a complete notebook multimedia control bar with eight capacitive touchkeys, an 8-channel slider with 256 steps resolution and eight Independently controlled LED.
