Microchip Technology AT42QT
AT42QT variants from Microchip Technology
AT42QT Overview
What changes between part numbers, and what to check before you lock the BOM — Capacitive Touch Sensor Interfaces.
Key Features
- Footprint / package: SOT-23-6, 32-TQFP, 32-VFQFN Exposed Pad, 28-VFQFN Exposed PadLand pattern and thermal pad differ between these packages — run a quick footprint check before you swap variants.
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
- 28 distinct suffix patternsExamples: 1011-TSHR, 1245-AU, 1010-MAHR, 1010-TSHR, 1011-MAHR (+23 more). Decode suffix meaning in the ordering notes under the variant table.
Target Applications
- Capacitive Touch Sensor Interfaces — design-in and field replacement
- BOM scrub where only the base prefix is known but suffix is TBD
- Second-source checks when the original MPN is constrained
Ordering Variants
Compare 28 AT42QT part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| AT42QT1011-TSHR | Package: SOT-23-6 | Mounting Type: Surface Mount | Supply Voltage: 1.8V ~ 5.5V | Operating Temperature: -40°C ~ 85°C | Resolution: 14 b | SOT-23-6 | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1245-AU | Package: 32-TQFP | Mounting Type: Surface Mount | Supply Voltage: 3V ~ 5V | Interface: SPI | Operating Temperature: -40°C ~ 105°C | Resolution: 10 b | 32-TQFP | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1010-MAHR | IC SENSR TOUCH/PROX 1CH 8-UDFN | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1010-TSHR | IC TOUCH SENSOR 1KEY SOT23-6 | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1011-MAHR | IC SENSR TOUCH/PROX 1CH 8-UDFN | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1012-MAHR | ONE-CHANNEL TOUCH SENSOR IC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1012-TSHR | IC TOUCH SENSOR 1KEY SOT23-6 | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1040-MMHR | IC TOUCH SENSOR 4KEY 20-VQFN | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1050-MMH | IC TOUCH SENSOR 5KEY 20VQFN | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1050-UUR | 5 CHANNEL QTOUCH ADC I2C SNSR IC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1060-MMUR | SENSOR IC MTRX TOUCH6KEY 28-QFN | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1070-MMHR | IC TOUCH SENSOR 7KEY 20VQFN | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1070-SSUR | IC TOUCH SENSOR 7KEY 14-SOIC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1244-AU | IC TOUCH SENSOR 24KEY 32TQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1244-AUR | Package: 32-TQFP | Mounting Type: Surface Mount | Supply Voltage: 3V ~ 5V | Interface: I²C | Operating Temperature: -40°C ~ 105°C | Resolution: 10 b | 32-TQFP | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1244-MU | IC TOUCH SENSOR 24KEY 32QFN | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1244-MUR | Package: 32-VFQFN Exposed Pad | Mounting Type: Surface Mount | Supply Voltage: 3V ~ 5V | Interface: I²C | Operating Temperature: -40°C ~ 105°C | Resolution: 10 b | 32-VFQFN Exposed Pad | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1245-AUR | IC TOUCH SENSOR 24KEY 32TQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1245-MU | IC TOUCH SENSOR 24KEY 32QFN | - | Microchip Technology | Active | Compliant | In Stock | |
| AT42QT1481-AU | IC TOUCH SENSOR 48KEY 44TQFP | - | Microchip Technology | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on AT42QT map to package, grade, and reel options.
How to Choose the Right AT42QT Capacitive Touch Sensor Interfaces
Match the footprint first
Packages here: SOT-23-6, 32-TQFP, 32-VFQFN Exposed Pad, 28-VFQFN Exposed Pad. Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For AT42QT, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.
Temp grade letter matters
Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.
Copy the full MPN
Do not BOM only "AT42QT" — include the full suffix (e.g. 1011-TSHR, 1245-AU, 1010-MAHR). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for AT42QT product family
Identity
Base Model
AT42QT
Manufacturer
Microchip Technology
Listed Variants
28
Variant Parameters
Package Type
SOT-23-6, 32-TQFP, 32-VFQFN Exposed Pad, 28-VFQFN Exposed Pad
Lifecycle Status
Active
RoHS Status
Compliant
Source AT42QT with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 28 ordering variants from Microchip Technology. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the AT42QT product family.
AT42QT is a base / family code from Microchip Technology. You order a full MPN such as AT42QT1011-TSHR, AT42QT1245-AU, AT42QT1010-MAHR. The variant table lists 28 orderable lines with different suffixes.
Listed suffix fragments include: 1011-TSHR, 1245-AU, 1010-MAHR, 1010-TSHR, 1011-MAHR, 1012-MAHR. Typically they encode package (SOT-23-6, 32-TQFP, 32-VFQFN Exposed Pad, 28-VFQFN Exposed Pad), temperature grade, and tape/reel option. Always decode on the Microchip Technology datasheet ordering guide — do not guess from pattern alone.
On this page the varying fields are: Package Type. Filter the table by the parameter you care about before picking an MPN.
Only after footprint and thermal review. Packages listed here (SOT-23-6, 32-TQFP, 32-VFQFN Exposed Pad, 28-VFQFN Exposed Pad) use different land patterns and often different thermal resistance. Layout swaps need a new paste stencil at minimum, not just a BOM edit.
Lifecycle values in our listing: Active. Status is per MPN suffix — one variant can be Active while another is NRND. Check PCN for your exact suffix before multi-year commitments.
Full manufacturer MPN (not just AT42QT), quantity, needed date code, reel vs tube, and any compliance docs (CoC, RoHS, conflict minerals). If you only know the base prefix, include a photo of the existing label or reel.
Use the datasheet link in the page header. Cross-check electrical curves (SOA, saturation voltage, etc.) against your operating point — the table summarizes order codes, not every graph in the PDF.