AT42QT1244-AU IC Sensors by Microchip Technology
| Status: | Active |
|---|---|
| Series: | AT42QT1244 |
| RoHS: | Compliant |
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.
Where to Buy
Prices starting from US$2.70
| Distributor | Stock | ||
|---|---|---|---|
|
Microchip Technology
from US$2.70
|
18,000
in stock
|
Buy Now |
|
Newark Electronics
from US$3.18
|
0
in stock
|
Buy Now |
|
Avnet America
from US$3.28
|
0
in stock
|
Buy Now |
|
TME
from US$3.08
|
0
in stock
|
Buy Now |
|
Farnell
from US$2.94
|
0
in stock
|
Buy Now |
|
EBV Elektronik
-
|
0
in stock
|
Buy Now |
|
Avnet Silica
-
|
0
in stock
|
Buy Now |
| Buy Now |
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. |
Specifications
| Product Type | Proximity/Keys/Slider |
|---|---|
| Input Channels | 0 |
| Max Number of keys | 24 |
| Slider | No |
| Proximity detection | No |
| Output Channels | 0 |
| Measurement Principle | E-Field |
| Report Rate (pps) | 0 |
| Number of Touches | 0 |
| Power Modes | 0 |
| Interface | I2C |
| I/O, LED Drivers | 0 |
| Other Features | Signal Guard/Driven Shield |
| Temp Range | Array |
| Voltage Min. (V) | 3.00 |
| Voltage Max. (V) | 5.50 |
| Pins | Packaging | 32 | TQFP |
| Packing Media | Tray (250) |
Last 6 months Inventory & Pricing History
Resources
Data Sheets |
|---|
| AT42QT1244 Datasheet |
Brochures |
|---|
| Product Selection Guide |
Environmental Information
| JEDEC Indicator | e3 |
|---|---|
| ROHS | Compliant |
| China EFUP | Compliant |
| Device Weight (g) | 0.3383 |
| Shipping Weight (kg) | 0.8 |
| Lead Count | 32 |
| Package Type | TQFP |
| Package Width or Size | 7x7x1.0mm |
| Soldering Composition | Matte Tin |
Alternative Descriptions
| QMatrix FMEA 24 Key Sensor IC | Microchip Technology |
| Qmatrix Fmea 24 Key Sensor Ic 32 Tqfp 7X7X1Mm Tray Rohs Compliant: Yes |Microchip Technology AT42QT1244-AU | Newark Electronics |
| Touch Sensor Capacitive 1 Key 3V to 5V Surface Mount 32-Pin TQFP | Avnet America |
| IC: switch | TME |
| CAPACITIVE TOUCH SENSOR, -40 TO 105DEG C | Farnell |
Frequently Asked Questions
Where can I find additional details, specifications and documents for a AT42QT1244-AU?
Additional datasheets, footprints and schematics for AT42QT1244-AU are listed on our Part Details page. You can also find images and similar parts to AT42QT1244-AU on this page.
What pricing and inventory information can I view?
Distributor pricing and stock information is available for AT42QT1244-AU on our Product Comparison page. Access via the 'View Pricing & Stock' button to view AT42QT1244-AU price breaks, MOQs, lead times, inventory and SKUs from distributors.
What category does AT42QT1244-AU fall under?
The AT42QT1244-AU is listed under Semiconductors - ICs > IC Sensors > Capacitive Touch Sensors.
Can I view similar or alternative parts?
You can view similar parts to AT42QT1244-AU when available in the Capacitive Touch Sensors range under the specifications section at the bottom of the details page.
Who can I contact for technical support of the product?
Submit any questions directly to the customer support team of the distributor listing the product. For the AT42QT1244-AU you can contact the distributor directly for product support, shipping queries etc.
Is the AT42QT1244-AU RoHS compliant?
Yes. This part has been flagged as RoHS Compliant by Microchip Technology.
Which authorised distributors for AT42QT1244-AU have stock available?
Authorised distributors including Microchip Technology, Newark Electronics, Avnet America, TME and Farnell have stock available or on a lead time for AT42QT1244-AU.
How do I check stock and lead times for all distributors?
Stock availability and lead times will be displayed for AT42QT1244-AU often in real-time on the comparison pages.
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