STMicroelectronics STMPE1208SQTR

Product Overview

The STMPE1208SQTR from STMicroelectronics is a high-performance capacitive touch controller IC designed for robust button and interface applications. As a trusted distributor, this component offers reliable sourcing for legacy designs and replacement needs.

• 12-channel capacitive touch sensing with 12-bit resolution for precise input detection
• I2C interface with up to 400kHz clock frequency for fast communication
• Low power consumption at 98μA nominal supply current, ideal for battery-sensitive applications
• Wide operating voltage range of 3V to 5.5V for flexible power integration
• Industrial temperature range from -40°C to +85°C ensuring reliability in harsh environments
• Compact 40-VFQFN package (5mm x 5mm) with exposed pad for efficient heat dissipation
• Surface mount design compatible with standard PCB assembly processes
• RoHS3 compliant and lead-free, meeting global environmental standards

Product Family: S-Touch? series, Capacitive Touch Sensor ICs. Industry Class: Suitable for industrial and consumer electronics. Environmental Compliance: ROHS3 Compliant, REACH No SVHC. Lifecycle Status: Obsolete; availability may be limited.

Technical Specifications & Features

Parameter-to-Benefit Integration: The wide operating voltage range of 3V to 5.5V allows seamless integration into various power systems, from 3.3V microcontrollers to 5V legacy designs, reducing the need for additional voltage regulators. The 12-bit resolution ensures accurate and responsive touch detection in applications like industrial keypads, minimizing false triggers and enhancing user experience. With 12 I/Os, this controller supports multi-button interfaces, enabling compact designs in consumer electronics such as smart home panels. The I2C interface at 400kHz provides high-speed data communication, critical for real-time touch feedback in medical devices or control systems. Additionally, the operating temperature range of -40°C to +85°C guarantees stable performance in outdoor or industrial environments, complying with stringent reliability standards.

Typical Applications & Industry Compliance

Industry Compliance: This component is RoHS3 compliant, REACH No SVHC, and features a Lead Free terminal finish (Matte Tin - annealed), ensuring it meets global environmental and safety regulations for electronic components.

Typical Use Cases: Ideal for industrial control panels and HMI (Human-Machine Interface) systems where durable touch input is required in dusty or temperature-variable settings. It is also suited for consumer electronics like smart home appliances and portable devices, leveraging its low power consumption for extended battery life. Furthermore, its robust design makes it applicable in automotive infotainment touchscreens (subject to additional qualification), providing reliable operation under vibration and temperature extremes.

Technical Resources & Documentation

• Official Datasheet from STMicroelectronics
• Application Notes for capacitive touch design and layout optimization
• PCB Layout Guidelines and reference designs
• 3D CAD Models for mechanical integration
• Software drivers and library resources for I2C interfacing

Cross-Reference & Market Availability

Alternative Parts: For drop-in replacements or similar functionality, consider the STMPE1208SQR (same series with different packaging) or competitor equivalents like the MPR121 from NXP, which offers comparable capacitive touch sensing with I2C interface. Always verify pin compatibility and specifications.

Market Status: As the STMPE1208SQTR is listed as Obsolete, production has ceased, and current stock may be limited or allocated. Lead times from distributors can vary; it is advisable to check real-time inventory or consider authorized alternatives for new designs. Supply chain trends indicate potential allocation constraints for legacy parts.

Frequently Asked Questions (FAQ)

• What is the operating voltage range for the STMPE1208SQTR? It supports a wide voltage range of 3V to 5.5V, making it versatile for both 3.3V and 5V systems without requiring external voltage adjustment.
• How many touch channels does this controller support? The STMPE1208SQTR provides 12 I/Os for capacitive touch sensing, suitable for multi-button interfaces in devices like control panels or keyboards.
• Is the STMPE1208SQTR suitable for industrial environments? Yes, with an operating temperature range of -40°C to +85°C and robust packaging, it is designed for industrial applications where temperature fluctuations and harsh conditions are common.
• What interface does this component use, and what is its speed? It utilizes an I2C interface with a clock frequency of up to 400kHz, enabling fast and efficient communication with microcontrollers or processors.
• What is the power consumption of the STMPE1208SQTR? The nominal supply current is 98μA, making it energy-efficient for battery-powered applications such as portable medical devices or IoT sensors.