STMPE16M31PXQTR

Touch Capacitive Sensor Overview

The STMPE16M31PX is a capacitive touchkey controller with proximity sensing capabilities. It integrates up to 16 capacitive sensor inputs and supports independent automatic calibration on all channels. The device features proximity sensing for distances over 3 cm, offering 15 fF resolution across 512 steps with 30 pF auto-tuning. It includes up to 16 general-purpose I/Os and eight independent PWM controllers capable of driving up to 16 LEDs with brightness control. Operating voltages are 1.65-1.95 V (VCC) and 2.7-5.5 V (VIO). Current consumption is 300 µA in active mode, 40 µA in sleep mode, and 5 µA in hibernate mode. Communication is handled via an I2C interface supporting up to 400 kHz.

Touch Capacitive Sensor Feature Summary

• Integrates up to 16 capacitive sensing channels with high sensitivity and noise tolerance.
• Includes eight independent PWM controllers for LED brightness control, ramping, and blinking.
• Supports proximity sensing capability for distances exceeding 3 cm.
• Features low operating current modes including sleep and hibernate states.

Touch Capacitive Sensor Applications

• Multimedia bars in notebook computers
• Portable media players and game consoles
• Mobile phones and smartphones

Touch Capacitive Sensor Procurement Notes

Verify the component status as obsolete before procurement planning. Confirm package type QFN32 (4 x 4 mm) and tape and reel packaging details. Ensure compatibility with existing system designs due to end-of-life status.

Touch Capacitive Sensor Selection Notes

Select this component for applications requiring integrated capacitive touchkeys and proximity sensing. Consider the 16-channel capacity and PWM LED driving capabilities. Verify voltage requirements for VCC and VIO domains. Check if the obsolete status impacts long-term supply needs.

Touch Capacitive Sensor Part Context

The STMPE16M31PX belongs to STMicroelectronics' S-Touch family of capacitive touchkey controllers. It is designed for versatile and flexible capacitive sensing solutions. The device combines touchkey detection with proximity sensing and GPIO/PWM functions in a single chip.

Touch Capacitive Sensor Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. As the product is marked obsolete, alternative components must be sourced through separate verification processes not covered by this datasheet.

Touch Capacitive Sensor FAQ

What is the maximum distance supported for proximity sensing?

The device supports proximity sensing capability for distances over 3 cm.

How many PWM controllers are integrated into the STMPE16M31PX?

The device integrates up to 8 independent PWM controllers, which can drive up to 16 PWM outputs.

What are the power consumption levels in different operating modes?

The device consumes 300 µA in active mode, 40 µA in sleep mode, and 5 µA in hibernate mode.