STMPE821/STMPE321 Touch Key Controllers

8-Channel or 3-Channel Capacitive Touch Key Controllers from STMicroelectronics

Image of STMicroelectronics' STMPE821/321 Touch Key ControllersTwo new touch key controllers in STMicroelectronics' portfolio offer a GPIO port expander and multiple PWM controllers (STMPE821) or simple 3-channel capacitive sensing for low system cost (STMPE321). Both devices are capable of interfacing with the host controller via two-line bidirectional bus (I2C). High tolerance to environmental changes (temperature, water film and drops, specific media material, scratching and breakage of overlay panel, PCB and assembly variations, RF and noise tolerance) is achieved with the highly innovative automatic calibration method and time integration noise removal algorithm.

Key Features Applications
  • STMPE321QTR 3-channel capacitive touch key controller operates from 1.65 V to 1.95 V and is supplied in a QFN12 package
  • STMPE821QTR 8-channel capacitive touch key controller with quad PWM operates from 2.7 V to 3.6 V and is supplied in a QFN16L package
  • Mobile phones and smartphones
  • Portable media players
  • Game consoles

STMPE821/STMPE321 Touch Key Controllers

ImageManufacturer Part NumberDescriptionAvailable Quantity
STMPE821QTR datasheet linkIC CTLR TOUCH KEY 8CH CAP 16-QFNSTMPE821QTRIC CTLR TOUCH KEY 8CH CAP 16-QFN1262 - Immediate
STMPE821QTR product page link
STMPE321QTR datasheet linkIC CTLR TOUCH KEY 3CH 12-QFNSTMPE321QTRIC CTLR TOUCH KEY 3CH 12-QFN373 - Immediate
STMPE321QTR product page link
Published: 2013-07-02