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Microchip AT42QT1040-MMHR

This touch screen module features a sleek design with four responsive keys, ideal for various applications

ISO14001 ISO9001 DUNS

Brands: Microchip Technology, Inc

Mfr.Part #: AT42QT1040-MMHR

Datasheet: AT42QT1040-MMHR Datasheet (PDF)

Package/Case: VQFN-20

Product Type: Sensor, Capacitive Touch

RoHS Status:

Stock Condition: 2,292 pcs, New Original

Warranty: 1 Year Ovaga Warranty - Find Out More

Quick Quote

Please submit RFQ for AT42QT1040-MMHR or email to us: Email: [email protected], we will contact you within 12 hours.

AT42QT1040-MMHR General Description

In conclusion, the AT42QT1040-MMHR stands out as a top-notch touch sensor IC that ticks all the boxes for modern human interface applications. With its advanced features, reliable performance, and ease of integration, this IC is a valuable asset for designers looking to incorporate touch functionality into their products. Its versatile nature, fast response time, and low power consumption make it a compelling choice for a range of industries and applications



    • Four discrete outputs indicating individual key touch
    • Technology: Patented spread-spectrum charge-transfer (direct mode)
    • Electrode Design: Simple self-capacitance style
    • Electrode Materials: Etched copper, silver, carbon, Indium Tin Oxide (ITO)
    • Electrode Substrates: PCB, FPCB, plastic films, glass
    • Panel Materials: Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
    • Panel Thickness: Up to 10 mm glass, 5 mm plastic (electrode size dependent)
    • Key Sensitivity: Fixed key threshold, sensitivity adjusted via sample capacitor value
    • Patented Adjacent Key Suppression® (AKS®) technology to enable accurate key detection
    • Interface: Pin-per-key outputs, plus debug mode to observe sensor signals
    • Moisture Tolerance: Increased moisture tolerance based on hardware design and firmware tuning
    • Signal Processing: Self-calibration, auto drift compensation, noise filtering
    • Applications: Mobile, consumer, white goods, toys, kiosks, POS
    • Power: 1.8 V – 5.5 V
    • Package: 20-pin 3 x 3 mm VQFN RoHS compliant


Parameter Value Parameter Value
Tags AT42QT104, AT42QT10, AT42QT1, AT42Q, AT42, AT4 Series QTouch™
Product Status Active Programmabe Not Verified
Type Buttons Proximity Detection No
Number of Inputs Up to 4 LED Driver Channels 4
Voltage - Supply 1.8V ~ 5.5V Current - Supply 10mA
Operating Temperature -40°C ~ 85°C Mounting Type Surface Mount
Package / Case 20-VFQFN Exposed Pad Supplier Device Package 20-VQFN (3x3)
Base Product Number AT42QT1040


Shipping Type Ship Fee Lead Time
DHL DHL $20.00-$40.00 (0.50 KG) 2-5 days
Fedex Fedex $20.00-$40.00 (0.50 KG) 2-5 days
UPS UPS $20.00-$40.00 (0.50 KG) 2-5 days
TNT TNT $20.00-$40.00 (0.50 KG) 2-5 days
EMS EMS $20.00-$40.00 (0.50 KG) 2-5 days
REGISTERED AIR MAIL REGISTERED AIR MAIL $20.00-$40.00 (0.50 KG) 2-5 days

Processing Time:Shipping fee depend on different zone and country.


Terms of payment Hand Fee
Wire Transfer Wire Transfer charge US$30.00 banking fee.
Paypal Paypal charge 4.0% service fee.
Credit Card Credit Card charge 3.5% service fee.
Western Union Western Union charge US.00 banking fee.
Money Gram Money Gram charge US$0.00 banking fee.


1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


  • Product

    Step1 :Product

  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

  • Packaging boxes

    Step5 :Packaging boxes

  • bar-code shipping tag

    Step6 :bar-code shipping tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

  • ESD
  • ESD

Part points

  • The AT42QT1040-MMHR chip is a touch sensor controller designed for capacitive touch buttons and sliders. It integrates signal processing and hardware keys, eliminating the need for external components. The chip detects changes in capacitance and converts them into digital signals, allowing for easy implementation of touch controls in various applications such as consumer electronics, automotive, and industrial.
  • Equivalent

    Some equivalent products to the AT42QT1040-MMHR chip include the AT42QT1040-TSHR and AT42QT1040-TU-ND. These chips are all touch sensors and have similar specifications and functionality.
  • Features

    The AT42QT1040-MMHR is a touch sensor controller with four capacitive touch channels. It offers a touch detection algorithm, noise filtering, and automatic calibration for optimal performance. It operates over a wide voltage range and is designed for low power consumption. It also offers an integrated LED driver and can be used in a variety of applications requiring touch sensing capabilities.
  • Pinout

    AT42QT1040-MMHR is a capacitive touch sensor IC with 40 touch channels. It features a 44-pin QFN package and is used for touch sensing applications.
  • Manufacturer

    Microchip Technology is the manufacturer of the AT42QT1040-MMHR. It is an American company that specializes in designing and manufacturing various semiconductor products.
  • Application Field

    The AT42QT1040-MMHR is a touch proximity sensor designed for applications such as consumer electronics, household appliances, automotive systems, and industrial controls. It can be used for touch-sensitive buttons, sliders, and proximity detection in a wide range of devices.
  • Package

    The AT42QT1040-MMHR chip is available in a 20-pin QFN (quad flat no-lead) package type with a compact size.

Datasheet PDF

Preliminary Specification AT42QT1040-MMHR PDF Download

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