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AT42QT1245

Status: In Production

Features:

  • Number of keys: Up to 24
  • Technology: Patented charge-transfer (transverse mode), with frequency hopping Key outline sizes:  6 mm × 6 mm or larger (panel thickness dependent); different sizes and shapes possible
  • Key spacings: 8 mm or wider, center to center (panel thickness dependent)
  • Electrode design: Two-part electrode shapes (drive-receive); wide variety of possible layouts
  • PCB Layers required: One layer (with jumpers), two layers (no jumpers)
  • Electrode materials: PCB, FPCB, silver or carbon on film, ITO on film
  • Panel materials: Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
  • Panel thickness: Up to 50 mm glass, 20 mm plastic (key size dependent)
  • Key sensitivity: Individually settable via simple commands over communication interface
  • Interface:  SPI (please use AT42QT1244 for I2C)
  • Signal processing: Self-calibration, auto drift compensation, noise filtering, Adjacent Key Suppression® (AKS®) technology
  • FMEA compliant design features
  • UL approval
  • VDE compliance
  • For use in both class B and class C safety-critical products
  • Detects and Reports Key Failure
  • Power supply: +3 V to 5 V
  • 32-pin 7 × 7 mm TQFP RoHS compliant
  • 32-pin 5 × 5 mm QFN RoHS compliant
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The Microchip's AT42QT1244 and 1245 are a capacitive touch controllers with configurable 24-QTouch buttons. The Microchip QMatrix sensing algorithm (mutual capacitance) enables the user to achieve more buttons than there are pins because of this matrix layout. The device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions and frequencies. UL approval and VDE compliance IEC/EN 60730 (Ed. 5.1) / IEC/EN 60335
(Ed. 5.2) for use in both class B and class C safety-critical products.

The AT42QT1245 connects via an SPI interface while the 42QT1244 features an I2C port.

For product comparison, please consider: AT42QT1244

Additional Features
    • Number of keys: Up to 24
    • Technology: Patented charge-transfer (transverse mode), with frequency hopping Key outline sizes:  6 mm × 6 mm or larger (panel thickness dependent); different sizes and shapes possible
    • Key spacings: 8 mm or wider, center to center (panel thickness dependent)
    • Electrode design: Two-part electrode shapes (drive-receive); wide variety of possible layouts
    • PCB Layers required: One layer (with jumpers), two layers (no jumpers)
    • Electrode materials: PCB, FPCB, silver or carbon on film, ITO on film
    • Panel materials: Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
    • Panel thickness: Up to 50 mm glass, 20 mm plastic (key size dependent)
    • Key sensitivity: Individually settable via simple commands over communication interface
    • Interface:  SPI (please use AT42QT1244 for I2C)
    • Signal processing: Self-calibration, auto drift compensation, noise filtering, Adjacent Key Suppression® (AKS®) technology
    • FMEA compliant design features
    • IEC/EN/UL60730 (Ed. 3.2) / IEC/EN 60335 (Ed. 4.2) compliant design features
      • UL approval
      • VDE compliance
      • For use in both class B and class C safety-critical products
      • Detects and Reports Key Failure
    • Power supply: +3 V to 5 V
    • Packages:
      • 32-pin 7 × 7 mm TQFP RoHS compliant
      • 32-pin 5 × 5 mm QFN RoHS compliant
Parametrics
Name
Value
Product Type
Proximity/Keys/Slider
Max Number of Keys
24
Interface
SPI
Voltage Range
3.00V - 5.50V

Documents

Jump to:

Data Sheet

12/01/2013
1252KB

Brochures

12/10/2016
4660KB

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
QT1 Xplained Pro extension kit
QT1 Xplained Pro extension kit ( ATQT1-XPRO )

QT1 Xplained Pro kit is an extension kit that enables evaluation of self- and mutual capacitance mode using the Peripheral Touch Controller(PTC). The kit shows how easy it is to design a capacitive touch board solution using the PTC without the need for any external components. The kit includes two boards, one using self-capacitance and one using mutual capacitance.

If you want to

...

Learn More
Add To Cart
QT2 Xplained Pro extension kit
QT2 Xplained Pro extension kit ( ATQT2-XPRO )

QT2 Xplained Pro is a QTouch Surface extension board for Xplained Pro boards that demonstrates the Peripheral Touch Controller (PTC) as a high performance touch-surface controller. The PTC controller uses very little power and resources from the MCU, which makes it easy to integrate touch surface support to your main project.

Learn More
Add To Cart
QT3 Xplained Pro extension kit
QT3 Xplained Pro extension kit ( ATQT3-XPRO )

QT3 Xplained Pro is a QTouch keypad extension board demonstrating an ultra-low power keypad design using the Peripheral Touch Controller (PTC). Utilizing the PTCs low power capabilities it enables markets lowest power wake-up on touch.

Note: QT3 Xplained Pro requires a compatible Xplained Pro evaluation kit. See the Related Tools tab for supported models.

Learn More
Add To Cart
QT6 Xplained Pro
QT6 Xplained Pro ( ATQT6-XPRO )

The QT6 Xplained Pro is a QTouch Surface extension board for Xplained Pro boards that demonstrates the Peripheral Touch Controller (PTC) as a high performance touch-surface controller. The PTC controller uses very little power and resources from the MCU, which makes it easy to integrate touch surface support to your main project.

Learn More
Add To Cart
SAMC20 QTR Demo
SAMC20 QTR Demo ( ATSAMC20-QTRDEMO )

The SAM C20 QTouch Robustness Evaluation kit demonstrates the high capacitive touch performance of the Peripheral Touch Controller (PTC) while achieving best-in-class conducted immunity and moisture tolerance required in home appliance and industrial applications.

The demo is based on the QTouch Library.

Key features:

    ...

    Learn More
    Add To Cart
    SAMD20 QTR Demo
    SAMD20 QTR Demo ( ATSAMD20-QTRDEMO )

    The SAM D20 QTouch Robustness Evaluation kit demonstrates the high capacitive touch performance of the Peripheral Touch Controller (PTC) while achieving best-in-class conducted immunity and moisture tolerance required in home appliance and industrial applications.

    The demo is part of the QTouch Safety Platform, key features of the QTouch Safety Platform are:

    ...

    Learn More
    Add To Cart
    SLCD1 Xplained Pro extension kit
    SLCD1 Xplained Pro extension kit ( ATSLCD1-XPRO )

    SLCD1 Xplained Pro is an extension kit with a 96-segment LCD display. It connects to Xplained Pro evaluation kits with segment LCD extension headers. For supported kits, see the related tools tab.

    Learn More
    Add To Cart

    Similar Devices

    Product
    Product Type
    Price 5K
    Notes
    Proximity/Keys/Slider
    $2.04
    IEC60730

    RoHS Information

    Part Number
    Device Weight (g)
    Shipping Weight (grams)
    Lead Count
    Package Type
    Package Width
    Solder Composition
    JEDEC Indicator
    RoHS
    China EFUP
    AT42QT1245-AUR
    0.338300
    0.497500
    32
    TQFP
    7x7x1.0mm
    Matte Tin
    e3
    AT42QT1245-AU
    0.338300
    0.800000
    32
    TQFP
    7x7x1.0mm
    Matte Tin
    e3
    AT42QT1245-MU
    0.060800
    0.448980
    32
    VQFN
    5x5x1mm
    Matte Tin
    e3
    AT42QT1245-MUR
    0.060800
    0.061000
    32
    VQFN
    5x5x1mm
    Matte Tin
    e3
    To see a complete listing of RoHS data for this device, please Click here
    Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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