EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts    AT42QT1070
AT42QT1070

MCHPAT42QT1070

Microchip Technology
Member of the AT42QT family offering single-chip capacitive touch solutions for small key counts.
Active66,809 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The AT42QT1070 is a dedicated capacitive touch controller designed for up to seven keys using Microchip's patented charge-transfer technology. It operates over a wide voltage range of 1.8V to 5.5V and simplifies user interface design by handling all touch processing, including auto-drift compensation and noise filtering, on-chip.

Why Choose This Part

It features Adjacent Key Suppression (AKS) technology which prevents false triggers by determining the strongest touch signal among nearby electrodes. The device also includes five integrated LED driver channels and a Guard Channel to prevent accidental activations from palm touches or spills.

Applications

Consumer Appliance Interfaces
Replacing mechanical buttons on white goods and small appliances with durable, easy-to-clean touch surfaces.
Smart Home Control Panels
Creating sleek, low-profile wall switches or thermostat controls with up to 7 discrete touch points.
Industrial Control Terminals
Implementing robust user inputs that are resistant to moisture, dust, and mechanical wear.
Handheld Battery Devices
Utilizing the Low Power (LP) mode and small VQFN package for portable electronics needing tactile-free input.

Key Specifications

Type Buttons
Interface I2C
Mounting Type Surface Mount
Package / Case 14-SOIC (0.154", 3.90mm Width)
Number of Inputs Up to 7
Voltage - Supply 1.8V ~ 5.5V
LED Driver Channels Up to 5
Proximity Detection No
Operating Temperature -40degC ~ 85degC
Supplier Device Package 14-SOIC

Getting Started

Connect the AT42QT1070 to a host microcontroller via the I2C-compatible interface to configure individual key sensitivity and sensor thresholds. For rapid prototyping, the AT42QT1070-XPRO Xplained Pro extension board is available for use with Microchip development ecosystems.

AT42QT1070 Family

Part NumberDifferenceStock
AT42QT1070-MMHR MMHR 7,078

Also Consider

CAP1188 MCHPMicrochip Technology - Offers 8 channels with integrated LED drivers and support for both I2C and SPI interfaces.
The 2026 Embedded Online Conference