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See Technical Specifications

AT42QT1244-MUR +BOM

Capacitive Touch Buttons 32-VQFN (5x5)

Manufacturer:

Microchip Technology, Inc
Mfr.Part #:

AT42QT1244-MUR
Datasheet:

AT42QT1244-MUR Datasheet (PDF)
Series:

QMatrix™
Programmable:

Not Verified
Type:

Buttons
Proximity Detection:

No
EDA/CAD Models:

Request Free CAD Models for AT42QT1244-MUR

Email: [email protected]

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AT42QT1244-MUR General Description

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 AT42QT1244 connects via an I2C interface while the 42QT1245 features a slave SPI port.

Key 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: I2C (please use AT42QT1245 for SPI)
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
IEC/EN/UL60730 (Ed. 5.1) / IEC/EN 60335 (Ed. 5.2) compliant design features for use in both class B and class C safety-critical appliance products.

Microchip Technology, Inc Original Stock

Specifications

Category	Integrated Circuits (ICs)InterfaceSensor, Capacitive Touch	Series	QMatrix™
Programmable	Not Verified	Type	Buttons
Proximity Detection	No	Number of Inputs	Up to 24
LED Driver Channels	-	Interface	I²C
Resolution	10 b	Voltage - Supply	3V ~ 5V
Current - Supply	6.6mA	Operating Temperature	-40°C ~ 105°C
Mounting Type	Surface Mount	Base Product Number	AT42QT1244