AT42QT1010-TSHR

Overview

The AT42QT1010-TSHR is a single-channel capacitive touch sensor IC from Microchip Technology, housed in a SOT-23-6 surface-mount package. It utilizes patented spread-spectrum charge-transfer technology to detect touch or proximity events through dielectric materials up to 12 mm thick. The device operates on a supply voltage of 1.8 V to 5.5 V and features an active-high digital output. Key specifications include a typical operating current of 17 µA at 1.8 V and a working temperature range of -40°C to +85°C. Internal signal processing provides self-calibration, auto drift compensation, and noise filtering without requiring external microcontroller intervention for basic sensing.

Feature Summary

• Patented spread-spectrum charge-transfer technology reduces RF emissions and enhances immunity to electromagnetic interference.
• Integrated signal processing includes self-calibration, asymmetric drift compensation, and a consensus filter requiring four consecutive detections to activate the output.
• Configurable run modes allow selection between fast response, low power consumption, or synchronization with external clock sources.
• HeartBeat health indicator superimposed on the output pin allows continuous monitoring of device operational status.

Applications

• Control panels and appliances
• Proximity sensor applications
• Toys and lighting controls

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and tape-and-reel specifications. Confirm that the component meets RoHS compliance requirements for your target market. Cross-reference the datasheet revision history to ensure compatibility with your design timeline and any potential manufacturing changes.

Selection Notes

Select this component when a single-button interface or proximity detection is required with minimal external circuitry. Ensure the application panel thickness does not exceed 12 mm for glass or 6 mm for plastic. Verify that the available electrode area is at least 6 mm x 6 mm to maintain optimal sensitivity and field projection capabilities.

Part Context

The AT42QT1010 belongs to the QTouch family of capacitive sensing solutions. It serves as a dedicated front-end processor for human-machine interfaces, replacing mechanical switches. The TSHR suffix specifically denotes the SOT-23-6 package variant, distinguishing it from other package options like the UDFN/USON configuration.

Replacement Considerations

Consult the official Microchip product selector guide for verified cross-references. No direct substitute part numbers are confirmed in the provided documentation.