QT118H-IS

Overview

The QT118H-IS is a self-contained digital integrated circuit from Microchip Technology, designed as a capacitive touch sensor. It operates on a supply voltage range of 2V to 5.5V with a typical supply current of 30µA. The device supports up to one input channel and features proximity detection capabilities. It includes an LED driver channel and offers 14-bit resolution for touch sensing. The component is housed in an 8-SOIC package (0.154 inch width, 3.90mm) and is intended for surface mount mounting. It functions within an operating temperature range of -40°C to 85°C.

Feature Summary

• Capacitive touch sensing with near-proximity detection capability
• Integrated single-channel LED driver functionality
• High-resolution 14-bit touch sensing data output
• Low power consumption suitable for battery-operated applications

Applications

• Consumer electronics requiring simple touch interface controls
• Industrial control panels needing robust proximity sensing
• Home appliance user interfaces with low-power requirements
• Automotive interior switches and buttons

Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. Confirm that the 8-SOIC footprint aligns with your PCB design constraints. Ensure the supply voltage range of 2V to 5.5V is compatible with your system's power architecture. Check for any specific RoHS compliance documentation if required by your manufacturing standards. Validate that the single-input configuration meets your application's interface needs.

Selection Notes

Select this component when a dedicated, low-pin-count touch sensor with integrated LED driving is required. It is suitable for applications where minimizing external components and board space is critical. Consider its 14-bit resolution for sensitivity requirements. Evaluate the 30µA supply current against your power budget constraints. Ensure the -40°C to 85°C operating range covers your environmental conditions.

Part Context

The QT118H belongs to Microchip's QT' charge-transfer touch sensor family. This series provides standalone solutions for detecting touch or near-proximity events without complex microcontroller intervention. The IS variant specifically denotes the industrial temperature grade and SOIC packaging option. It complements other sensors in the lineup by offering a simplified interface for basic touch applications.

Replacement Considerations

Check Microchip's official substitution guide for direct pin-compatible alternatives within the QT11x series. Verify if upgraded models offer additional channels or different package options while maintaining electrical compatibility. Ensure any substitute maintains the same 2V-5.5V supply range and 14-bit resolution specifications.