QT1081 8-KEY QTOUCH™ SENSOR IC is a touch sensor IC applied to touch panel. It supports 1 to 8 keys, has patented spread-spectrum charge-transfer technology, and can realize single-key mode. It supports 5mm x 5mm or larger key size, 6mm or wider key spacing, single layer electrode design, FR-4, CEM-1 or FR-2 PCB materials, Orgacon™ ink, plastic, glass, composite materials, painted surfaces, and adjacent ground metal. It supports a panel thickness of up to 50mm for glass and 20mm for plastic. The key sensitivity can be set by changing the value of the reference capacitor (Cs). It supports parallel discrete output, output voltage is 2.8V ~ 5.0V, and the working current is less than 15µA. The package form is 32-pin 5 x 5mm QFN, which meets the RoHS standard.
The QT1081 sensor IC from Quantum is a simplified, lower‑cost version of the QT1080. It supports 1 to 8 touch keys and uses QTouch™ charge‑transfer sensing for robust, EMC‑resistant operation in consumer and portable devices. The device offers multiple output modes, optional Adjacent Key Suppression, and both sync and low‑power modes.
The datasheet provides detailed specifications, pin‑out tables, wiring guidelines, and design notes for PCB or flexible substrates. It also describes startup calibration, burst operation, drift compensation, and configuration via option resistors.
| Power supply | 2.8 V ~ 5.0 V, <15 µA (8 keys at 2.8 V, 340 ms Low Power mode) |
|---|---|
| Package | 32‑pin 5 × 5 mm QFN, RoHS compliant |
| Moisture tolerance | Up to 50 mm glass, 20 mm plastic (key size dependent) |
| Startup time | ≈300 ms after reset |
In low‑power mode it draws less than 15 µA at 2.8 V (8 keys, 340 ms response).
It requires about 300 ms to initialize, calibrate, and become fully operational.
It is supplied in a 32‑pin 5 × 5 mm QFN package that is RoHS compliant.