QT161-DG

Overview

The QT161-DG is a capacitive touch sensor integrated circuit from Microchip Technology, designed for QTouch and QProx applications. It supports up to six independent input channels for button detection and proximity sensing. The device features an integrated LED driver with up to six channels for visual feedback control. It is housed in a 28-pin DIP package (0.300 inch width) suitable through-hole mounting. The component operates as a single-chip solution for user interface implementations requiring reliable touch interaction.

Feature Summary

• Supports up to six independent capacitive touch input channels
• Integrates LED driver functionality for up to six output channels
• Enables proximity detection capabilities within the sensor array
• Designed for robust QTouch algorithm implementation

Applications

• Capacitive touch button interfaces
• Proximity sensing systems
• Consumer electronics user controls
• Industrial panel input devices

Procurement Notes

Verify the specific package variant when ordering, as the suffix indicates the 28-DIP configuration. Confirm that the application design accommodates the through-mounting requirements associated with this package style. Ensure compatibility with existing QTouch development tools if firmware updates are planned. Check for any obsolete status notifications from the manufacturer regarding long-term supply availability.

Selection Notes

Select this component when a through-hole DIP package is required for capacitive touch designs. It is appropriate for projects needing up to six touch inputs combined with direct LED driving capabilities. Consider alternative surface mount packages like the QT161-AS if PCB space constraints dictate SMT assembly. Evaluate channel count requirements against other members of the QProx family for optimal cost-performance balance.

Part Context

This part belongs to the QProx and QTouch series of capacitive sensing solutions by Microchip Technology. It complements other variants such as the QT150-DG, which offers five keys, and the QT161-AS, which provides similar functionality in a surface-mount package. The series focuses on providing integrated sensing and actuation control for intuitive human-machine interfaces.

Replacement Considerations

The QT161-AS serves as a functional equivalent offering identical electrical characteristics but in an MSOP-8 surface-mount package. Designers must account for mechanical footprint differences when substituting. No other direct pin-compatible replacements are documented in public sources.