AT42QT1010-MAHR

Overview

The AT42QT1010-MAHR is a single-channel digital burst mode charge-transfer sensor IC manufactured by Microchip Technology. It detects near proximity or touch, suitable for replacing mechanical switches in human interfaces. The device operates on a supply voltage of 1.8 V to 5.5 V and consumes 17 µA at 1.8 V typical. It features one configurable key or proximity sensor using patented spread-spectrum charge-transfer technology. The component is housed in an 8-pin UDFN/USON package compliant with RoHS standards.

Feature Summary

• Patented spread-spectrum charge-transfer technology reduces RF emissions and EMI susceptibility while maintaining excellent response time.
• Integrated signal processing includes self-calibration, auto drift compensation, and noise filtering for stable sensing under changing conditions.
• Configurable as either a single key or a proximity sensor with support for solid or ring electrode shapes.
• Includes HeartBeat health monitoring feature that superimposes a status indicator on the output pin.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and compliance status. Ensure the source document matches the manufacturer's current datasheet revision. Confirm availability through authorized distribution channels. Check for any product change notifications related to assembly or marking updates prior to finalizing procurement orders.

Selection Notes

Select this component for applications requiring a single touch input or proximity detection with minimal external components. Consider the 8-pin UDFN/USON package for space-constrained designs. Evaluate panel thickness and material dielectric constant to determine appropriate sample capacitor values. Ensure power supply stability to prevent latch-up events during transients.

Part Context

The AT42QT1010 belongs to the QTouch family of capacitive touch sensors from Microchip Technology. This series utilizes proprietary charge-transfer methods to achieve high noise immunity. The -MAHR suffix indicates the specific packaging configuration for this variant within the broader product line.

Replacement Considerations

Consult official substitution guides for compatible alternatives within the same family. Verify pinout compatibility and electrical specifications before swapping components. Ensure replacement parts meet the same environmental and regulatory requirements.