QT112-ISG

Overview

The QT112-ISG is a capacitive touch sensor integrated circuit from Microchip Technology, belonging to the QProx series. It features a single channel designed for button applications with support for proximity detection. The device operates within a supply voltage range of 2.5V to 5.5V and draws a typical supply current of 60µA. It offers a 14-bit resolution for sensing accuracy. The component is rated for an operating temperature range of 0°C to 70°C. It is housed in an 8-DIP package with a width of 0.300 inches (7.62mm) and utilizes through-hole mounting technology.

Feature Summary

• Capacitive sensing technology enabling non-contact user interaction
• Integrated proximity detection capability for enhanced input functionality
• Single-channel configuration optimized for dedicated button applications

Applications

• Consumer electronics requiring simple tactile interface inputs
• Industrial control panels needing robust button interfaces
• Appliance control modules with limited pin count constraints

Procurement Notes

Verify the specific suffix ISG against official Microchip documentation to confirm package type and tape-and-reel specifications. Confirm end-of-life status and availability through authorized distributors. Ensure compatibility with existing PCB footprints for 8-DIP packages during procurement planning.

Selection Notes

Select this component when a single-channel capacitive solution with proximity sensing is required. Verify that the 0°C to 70°C operating temperature range meets environmental requirements. Compare power consumption specs against battery-operated alternatives if energy efficiency is critical.

Part Context

The QT112-ISG is part of Microchip's QProx family, which focuses on capacitive touch solutions. This series provides integrated sensing capabilities without external microcontrollers. The ISG suffix typically denotes specific packaging or testing variations within the standard QT112 product line.

Replacement Considerations

Check for direct replacements within the QProx series. Evaluate similar single-channel capacitive sensors from other manufacturers if the QT112-ISG is unavailable. Ensure pin compatibility and software library support for any substitute components.