AT42QT1011-TSHR

Overview

The AT42QT1011-TSHR is a digital burst mode charge-transfer sensor IC from Microchip Technology, designed for human interface applications. It features one configurable key or proximity sensor channel using patented spread-spectrum charge-transfer technology. The device operates on a single supply voltage ranging from 1.8 V to 5.5 V, with a typical current consumption of 17 µA at 1.8 V. It utilizes an 8-pin UDFN/USON package and includes internal signal processing functions such as self-calibration, auto drift compensation, and noise filtering. The output is active-high upon detection.

Feature Summary

• Patented spread-spectrum charge-transfer technology reduces RF emissions and EMI susceptibility while maintaining excellent response time.
• Integrated signal processing provides stable sensing through self-calibration, adaptive baseline tracking, and consensus filtering for noise rejection.
• Configurable run modes including Fast, Low Power, and SYNC allow optimization for either speed or power efficiency based on application requirements.
• HeartBeat health indicator superimposed on the output pin allows continuous monitoring of device operational status.

Applications

• Control panels and consumer 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 all relevant regulatory standards required for your target market before finalizing procurement orders.

Selection Notes

Select this component when a single-channel touch or proximity solution is required with minimal external components. Ensure the design accommodates the 8-UDFN package constraints and provides adequate bypass capacitance near the power pins to maintain stability under varying load conditions.

Part Context

This part belongs to the AT42QT1011 series within Microchip's QTouch portfolio. It serves as a dedicated touch sensing front-end, distinct from general-purpose microcontrollers, offering deterministic response times and industrial-grade robustness for replacing mechanical switches in embedded systems.

Replacement Considerations

Direct replacements must match the 8-UDFN package and functional specifications of the AT42QT1011 series. Verify compatibility with existing electrode designs and firmware logic if migrating from legacy Atmel or Microchip touch controllers.