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AT42QT1011-TSHR

MCHPAT42QT1011-TSHR

Microchip Technology
Capacitive Touch Buttons SOT-23-6
Active40,208 in stock
Datasheet Digi-Key Compare Prices

Overview

The AT42QT1011-TSHR is a single-channel digital output charge-transfer capacitive touch controller designed for creating reliable touch buttons. It operates across a wide 1.8V to 5.5V supply range and features built-in self-calibration and auto-drift compensation to maintain sensitivity in varying environments.

Why Choose This Part

It offers an infinite maximum on-duration to prevent sensor hang-ups and includes sophisticated noise filtering for high reliability. The SOT-23-6 package provides a tiny footprint for space-constrained designs, while the 17uA typical standby current makes it suitable for battery-powered applications.

Applications

Sealed Control Panels
Used behind glass or plastic overlays to create waterproof and dustproof user interfaces.
Proximity Sensing
Configurable for detecting a hand or finger approaching the surface without direct contact.
Mechanical Switch Replacement
Replaces membrane or mechanical buttons with solid-state touch sensors to eliminate wear and tear.

Key Specifications

Type Buttons
Resolution 14 b
Mounting Type Surface Mount
Package / Case SOT-23-6
Current - Supply 378.5uA
Number of Inputs 1
Voltage - Supply 1.8V ~ 5.5V
Proximity Detection Yes
Operating Temperature -40degC ~ 85degC
Supplier Device Package SOT-23-6

Getting Started

Design begins by selecting a sense capacitor (Cs) to tune sensitivity for the specific overlay thickness. The digital output pin can be connected directly to a microcontroller GPIO or a power MOSFET for standalone operation. For rapid prototyping, the AT42QT1011 can be evaluated using a generic SOT-23-6 breakout board.

AT42QT1011 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
AT42QT1011-TSHR (this part) 6-23 40,208
AT42QT1011-MAHR UFDFN-8 15,423

Also Consider

AT42QT1010-TSHR MCHPMicrochip Technology - Similar single-key touch controller but features a fixed 60-second maximum on-duration timeout to prevent stuck-key conditions.
CAP1293-1-SN-TR MCHPMicrochip Technology - Provides three channels of capacitive touch in an 8-SOIC package for designs requiring multiple buttons.