QT110-D

Overview

The QT110-D is a digital charge-transfer touch sensor IC designed for human-machine interfaces. It operates on a single supply voltage ranging from 2.5V to 5V with a typical current consumption of 20 µA. The device features a 14-bit switched capacitor ADC and provides an active-low output signal upon detection. It supports multiple operational modes including DC, toggle, and pulse outputs, selectable via strap options. The component is housed in an 8-pin DIP package and is rated for operation within a temperature range of 0°C to +70°C.

Feature Summary

• Self-contained digital processing with continuous autocalibration
• Capacitive sensing through various dielectric materials
• Integrated piezo acoustic drive for tactile feedback
• Built-in HeartBeat health indicator on the output pin

Applications

• Elevator buttons
• Appliance control panels
• Light switches
• Industrial panels
• Security systems

Procurement Notes

Verify the specific suffix 'D' indicates the 8-pin DIP package variant rather than the SOIC version. Confirm the operating temperature range matches the 0°C to +70°C specification for this part number. Check RoHS compliance status as older Microchip inventory may vary. Ensure the supplier provides the official datasheet for accurate pinout verification before integration.

Selection Notes

Select the QT110-D when a through-hole DIP package is required for prototyping or specific board layouts. This model is suitable for applications requiring low power consumption under 20 µA. Consider the QT110H if an active-high logic output is preferred over the standard active-low configuration. Evaluate the need for external capacitors based on the chosen electrode capacitance and gain settings.

Part Context

The QT110 belongs to the QProx family of charge-transfer sensors developed by Quantum Research Group and manufactured by Microchip Technology. It utilizes proprietary signal processing algorithms to maintain stability against environmental drift. The device replaces mechanical switches by projecting a sensing field through non-conductive overlays.

Replacement Considerations

Public confirmed substitute part numbers are not available.