QT112-D

Overview

The Microchip Technology QT112-D is a single-channel capacitive touch sensor integrated circuit belonging to the QProx series. It supports both touch button and proximity detection functions within a single package. The device operates on a supply voltage range of 2.5V to 5.5V with a typical supply current of 60µA. It features a 14-bit resolution for sensing accuracy. The component is housed in an 8-PDIP (0.300 inch, 7.62mm) package designed for through-hole mounting. It is rated for operation within a temperature range of 0°C to 70°C.

Feature Summary

• Integrates single-channel capacitive touch sensing with proximity detection capabilities
• Provides high-resolution 14-bit sensing data for accurate input recognition
• Supports low-power operation suitable for battery-constrained applications

Applications

• Capacitive touch button interfaces for consumer electronics
• Proximity sensing modules requiring single-channel detection
• Low-power embedded control panels

Procurement Notes

Verify component authenticity through authorized Microchip distributors or certified suppliers. Confirm the specific package variant matches the 8-PDIP requirement. Check for RoHS compliance status as indicated in official documentation, noting potential regulatory variations. Ensure storage conditions adhere to moisture sensitivity level guidelines to maintain device integrity prior to assembly.

Selection Notes

Select this component when a single-channel solution combining touch and proximity functions is required. The 8-PDIP package facilitates easy prototyping and through-hole PCB integration. Consider the 60µA supply current for power budget calculations. Verify that the 0°C to 70°C operating range meets the environmental requirements of the target application.

Part Context

The QT112-D is part of Microchip's QProx family of capacitive touch sensors. This series focuses on providing simple, cost-effective solutions for single-button applications. It serves as a dedicated interface between mechanical inputs and digital systems, eliminating the need for complex external sensing circuits.

Replacement Considerations

Consult Microchip technical support for verified substitute part numbers. Cross-referencing should be limited to officially documented equivalents to ensure pinout and functional compatibility.