STMPE821/321 Touch Key Controllers

8-Channel or 3-Channel Capacitive Touch Key Controllers - Now Available at Digi-Key

STMicroelectronics STMPE821/321 Touch Key Controllers Two 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 1.65V to 1.95V and is supplied in a QFN12 package   STMPE321 Datasheet
  • STMPE821QTR 8-channel capacitive touch key controller with quad PWM operates from 2.7V to 3.6V and is supplied in a QFN16L package   STMPE821 Datasheet
  • Mobile phones and smartphones
  • Portable media players
  • Game consoles
RoHS Compliant

Part Number
Part Number
Packaging Supply Voltage Data Interface Package
STMPE321QTR 497-8985-2-ND Tape & Reel 1.65V ~ 1.95V I2C 12-QFN
497-8985-1-ND Cut Tape
497-8985-6-ND Digi-Reel®
STMPE821QTR 497-8826-2-ND Tape & Reel 2.7V ~ 3.6V I2C 16-QFN
497-8826-1-ND Cut Tape
497-8826-6-ND Digi-Reel®