QT60486-AS

Overview

The QT60486-AS is a digital charge-transfer QMatrix controller designed for matrix geometry touch controls, supporting up to 48 keys. It operates on a single +5V supply and features an integrated oscillator requiring a 16MHz resonator. The device supports both SPI slave and UART serial interfaces for host communication. Key parameters include a supply voltage of 5V, an operating temperature range of -40°C to +105°C, and a 44-pin TQFP package. It utilizes transverse charge-transfer sensing technology to detect touches through dielectric materials.

Feature Summary

• Supports up to 48 touch keys in an X-Y matrix configuration with individually adjustable sensitivity and response time.
• Features adaptive auto self-calibration and drift compensation algorithms for robust operation in harsh environments.
• Capable of detecting touch through various dielectrics including glass, plastic, stone, and wood up to 50mm thickness.
• Includes FMEA compliant design features with synchronous noise suppression and spread-spectrum modulation.

Applications

• Automotive panels
• Machine tools
• ATM machines
• Security keypads
• Industrial keyboards

Procurement Notes

Verify the specific suffix AS indicates the automotive grade temperature range (-40°C to +105°C) against the manufacturer's official documentation. Confirm that the ordering information matches the 44-pin TQFP package type. Ensure compatibility with the required 16MHz external resonator and passive component values for the target application environment.

Selection Notes

Select this model when a high number of touch keys (up to 48) are required in a matrix layout. It is suitable for applications demanding high environmental resilience and vandalism resistance. Consider the interface requirements; the device autodetects between SPI and UART but cannot use both simultaneously. Ensure the host system can support the necessary command protocol and DRDY handshake timing.

Part Context

The QT60486-AS belongs to the QProx QT60xx6 series of QMatrix ICs from Quantum Research Group (QRG), now part of Microchip Technology. This series includes variants supporting 16, 24, 32, and 48 keys. The devices are designed for advanced second-generation QMatrix control using transverse charge-transfer sensing technology.

Replacement Considerations

QT60326-AS: Supports 32 keys with identical electrical characteristics and package. QT60246-AS: Supports 24 keys. QT60166-AS: Supports 16 keys. All variants share the same 44-pin TQFP package and core functionality, differing only in the maximum number of supported keys.