QT60326-ASG

Overview

The Microchip Technology QT60326-ASG is a 32-key QMatrix™ integrated circuit designed for digital charge-transfer touch sensing. It operates within a temperature range of -40°C to +105°C and utilizes a 44-pin TQFP package. The device supports both SPI slave and UART communication interfaces for host connectivity. Key parameters are individually adjustable via serial commands, with configurations stored in onboard EEPROM. The IC detects human touch through dielectric materials up to 50mm thick using an X-Y matrix scan sequence.

Feature Summary

• Transverse charge-transfer sensing technology enables detection through various dielectrics including glass, plastic, and wood.
• Integrated adaptive auto self-calibration and drift compensation algorithms ensure robust operation under environmental changes.
• Spread-spectrum modulation provides high immunity to electromagnetic interference and reduces RF emissions.
• Supports mixed key sizes and shapes within a single panel with individually adjustable sensitivity and response time.

Applications

• Automotive control panels
• Industrial machine tool interfaces
• ATM machines and electronic kiosks
• Security keypads and access control systems

Procurement Notes

Verify the specific suffix 'ASG' against official documentation to confirm the exact temperature grade and package variant. Ensure the ordering information matches the required 32-key capacity and interface specifications. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer prior to procurement.

Selection Notes

Select this component when a solution is required for sealed, watertight control panels immune to vandalism and environmental factors. It is suitable for applications needing flexible key layouts on PCBs or flex circuits without chip-on-glass techniques. Consider the 48-key QT60486 if more inputs are needed, as the electrical functions remain identical between the variants.

Part Context

This part belongs to the QMatrix™ family of digital charge-transfer sensors developed by Quantum Research Group (QRG) and distributed by Microchip Technology. These ICs are engineered specifically for matrix geometry touch controls, offering stable sensing capabilities with minimal external component requirements compared to traditional resistive or capacitive solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The QT60486-ASG serves as the functional equivalent for applications requiring 48 keys instead of 32, sharing identical electrical characteristics and pinouts.