STMPE321 Datasheet (ST Microelectronics) - 3-channel capacitive touch key controller

STMPE321, 3-channel capacitive touch key controller

The STMPE321 is a 3-channel capacitive touch key controller.

Capacitance measurement is implemented in fully optimized hardware.

All 3 I/Os can be configured via an I2C bus to function as either capacitive touch key, or as GPIOs (general purpose I/O).

Applications * * * Mobile phones a

STMPE321 Features

* Up to 3 GPIOs Up to 3 capacitive touch key inputs Operating voltage 1.65 - 1.95 V Internal regulator Interrupt output pin I2C interface (1.8 V operation, 3.3 V tolerant) 8 kV HBM ESD protection 40 fF resolution, 128-step