STMPE1208SQTR

Touch Capacitive Sensor Overview

The STMPE1208SQTR is a 12-channel capacitive touchkey controller featuring 12 general-purpose I/Os. It operates on a 3.0 to 5.5 V supply with active current consumption of 98 µA and idle consumption of 60 µA. The device communicates via an I2C interface supporting speeds up to 400 kHz. It includes dual interrupt outputs, 7 kV HBM ESD protection, and advanced data filtering with environment tracking calibration. Packaged in a QFN40 (5 x 5 mm) format, it is supplied in tape and reel.

Touch Capacitive Sensor Feature Summary

• Capacitive sensing with automatic impedance calibration for environmental stability
• Configurable three-stage data filtering system with adjustable touch variance
• Dual interrupt pins for touch events and general status monitoring
• Integrated beep generator capable of driving external piezo buzzers

Touch Capacitive Sensor Applications

• Notebook computers
• Monitors and televisions
• Set-top boxes and home entertainment systems
• Portable media players and game consoles
• Mobile phones and domestic appliances

Touch Capacitive Sensor Procurement Notes

Verify the obsolete status of this component before design finalization. Confirm that the QFN40 package dimensions and pinout match your PCB layout requirements. Ensure the host system supports the required I2C addressing modes and voltage levels compatible with the 3.0 to 5.5 V operating range specified in the datasheet.

Touch Capacitive Sensor Selection Notes

Select this component when a low-power capacitive touch solution with integrated GPIOs is required. It is suitable for designs needing automatic calibration to handle varying environmental conditions. Consider the QFN40 package size constraints and the availability of I2C bus lines on the main processor. Verify that the power supply architecture can support the internal regulator or direct 2.5 V input options.

Touch Capacitive Sensor Part Context

The STMPE1208S belongs to STMicroelectronics' S-Touch family of capacitive sensor controllers. This specific part number represents the tape and reel version of the chip, designed for automated surface-mount assembly processes. It serves as a dedicated interface between touch keys and a host microcontroller, offloading sensing and filtering tasks.

Touch Capacitive Sensor Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.