QT110-S

Overview

The QT110-S is a digital charge-transfer touch sensor IC from the QTouch series, designed for human-machine interfaces. It operates on a single supply voltage of 2.5V to 5V with a typical current consumption of 20 µA. The device features a 14-bit resolution and utilizes a serial interface for communication. Packaged in an 8-SOIC (Surface Mount) format, it functions within a commercial temperature range of 0°C to 70°C. The IC integrates internal signal processing to handle drift and noise, requiring only a single external capacitor for operation.

Feature Summary

• Charge-transfer sensing technology enabling detection through dielectrics like glass or plastic
• Continuous auto-calibration with asymmetric drift compensation algorithms
• Configurable output modes including DC, Toggle, and Pulse via strap options
• Integrated HeartBeat health indicator and piezo acoustic drive capability

Applications

• Elevator buttons
• Toys & games
• Access systems
• Pointing devices
• Appliance control

Procurement Notes

Verify component status as the QT110-S is listed as obsolete in distributor records. Confirm availability of alternative packages or successor models if long-term production support is required. Check RoHS compliance status against specific manufacturing dates, as older stock may not meet current environmental regulations.

Selection Notes

Select the QT110-S for applications requiring low power consumption and simple integration without external analog components. Ensure the application environment stays within the 0°C to 70°C operating range. Consider the QT110H variant if active-high logic levels are preferred over the standard active-low output of the QT110.

Part Context

The QT110 belongs to Microchip's QTouch family of capacitive touch sensors. It is part of the broader QT110/QT110H series which includes variants with different temperature ratings and logic polarities. This specific model represents the standard commercial grade version in an SOIC package.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.