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.
AT42QT is a Microchip Technology order-code family — not a single orderable MPN. This page lists 28 variants that share the same core device but differ in suffix fields (package, grade, reel/tube, electrical bin, etc.). Pick the exact full part number; substituting within the family without checking the datasheet often causes assembly or spec mismatches.
Package: SOT-23-6 | Mounting Type: Surface Mount | Supply Voltage: 1.8V ~ 5.5V | Operating Temperature: -40°C ~ 85°C | Resolution: 14 b Other listed variants describe: Package: 32-TQFP | Mounting Type: Surface Mount | Supply Voltage: 3V ~ 5V | Interface: SPI | Operating Temperature: -40°C ~ 105°C | Resolution: 10 b; IC SENSR TOUCH/PROX 1CH 8-UDFN.
Across listed variants, watch these parameters: packages: SOT-23-6, 32-TQFP, 32-VFQFN Exposed Pad, 28-VFQFN Exposed Pad.
Suffix examples in this family: 1011-TSHR, 1245-AU, 1010-MAHR, 1010-TSHR, 1011-MAHR, 1012-MAHR, 1012-TSHR, 1040-MMHR. The characters after the base number usually encode package, temperature, or performance grade — compare the variant table column-by-column rather than assuming pin-compatible drops-in.
Columns that actually vary on this page: Package Type. If two rows match on MPN prefix but differ there, they are not interchangeable for production.
Example MPNs: AT42QT1011-TSHR, AT42QT1245-AU, AT42QT1010-MAHR, AT42QT1010-TSHR, AT42QT1011-MAHR, AT42QT1012-MAHR.
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.
AT42QT uses a shared prefix; characters after the prefix encode orderable options. Two lines with the same prefix are not drop-in replacements unless the differing columns match your need.
Suffixes seen here: 1011-TSHR, 1245-AU, 1010-MAHR, 1010-TSHR, 1011-MAHR, 1012-MAHR, 1012-TSHR, 1040-MMHR, 1050-MMH, 1050-UUR (+18 more).
What changes between rows: Package Type. Sort the table by these columns when narrowing from base number to a single MPN.
Full MPN examples: AT42QT1011-TSHR, AT42QT1245-AU, AT42QT1010-MAHR, AT42QT1010-TSHR, AT42QT1011-MAHR.
Tip: photograph or copy the reel label — reel diameter, QTY per reel, and moisture sensitivity level (MSL) are often suffix-driven and won't show in the schematic.
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
Variant Parameters
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.