STMPE16M31QTR

Touch Capacitive Sensor Overview

The STMPE16M31QTR is a capacitive touchkey controller from the S-Touch family, manufactured by STMicroelectronics. It integrates up to 16 capacitive sensor inputs and supports I2C communication at speeds up to 400 kHz. The device operates with a core voltage of 1.65-1.95 V and an I/O supply of 2.7-5.5 V. It features eight independent PWM controllers for LED driving, providing up to 12 mA sourcing/sinking capability per GPIO at 3.3 V. Power consumption is specified as 400 µA in active mode, 50 µA in sleep mode, and 5 µA in hibernate mode. The component is housed in a 32-QFN (4x4 mm) package.

Touch Capacitive Sensor Feature Summary

• Integrates hardwired ratiometric engines for slider/wheel implementation without external computation
• Includes eight independent PWM controllers supporting brightness control, ramping, and blinking capabilities
• Features configurable automatic calibration on all channels with high sensitivity and noise tolerance

Touch Capacitive Sensor Applications

• Notebook computer multimedia bars
• Portable media players and game consoles
• Mobile phones and smartphones

Touch Capacitive Sensor Procurement Notes

Verify component status before integration, as this specific part number may be classified as obsolete. Confirm availability through authorized distributors or secondary markets. Ensure that the final silicon version matches the required application specifications. Check for alternative lead times and potential end-of-life restrictions when planning long-term production cycles.

Touch Capacitive Sensor Selection Notes

Select this controller for designs requiring integrated capacitive sensing and LED driving within a single chip. The QFN32 package suits space-constrained applications. Verify that the host system supports the required I2C addressing modes and that the power supply rails align with the specified VCC and VIO ranges for optimal performance.

Touch Capacitive Sensor Part Context

This component belongs to the STMPE16/24M31 series of S-Touch controllers. It shares architectural similarities with the STMPE24M31 but offers a reduced pin count suitable for 16-channel configurations. The device is designed to replace discrete touch sensing solutions by combining sensor processing, GPIO expansion, and PWM generation into one integrated circuit.

Touch Capacitive Sensor Replacement Considerations

Consult official documentation for direct substitutes. No confirmed public substitute part numbers are available.