AT42QT1481-AUR

Overview

The AT42QT1481-AUR is a digital burst mode touch sensor IC from Microchip Technology, designed for QMatrix layouts with up to 48 keys. It operates on a +4.75V to 5.25V supply and features UART and SPI slave interfaces (max 4 MHz). The device uses patented transverse charge-transfer technology with frequency hopping. It supports self-calibration, auto drift compensation, noise filtering, and Adjacent Key Suppression. The component is housed in a 44-pin 10x10 mm TQFP package.

Feature Summary

• Supports up to 48 keys using patented transverse charge-transfer sensing technology
• Includes signal processing functions such as self-calibration, auto drift compensation, and Adjacent Key Suppression
• Compatible with FMEA and IEC/EN/UL60730 safety-critical product standards
• Offers flexible electrode design options including two-part shapes and various panel materials

Applications

• Safety-critical products requiring EN60730 compliance
• FMEA compliant industrial control panels
• Multi-key capacitive touch interfaces with glass or plastic overlays

Procurement Notes

Verify the specific ordering suffix 'AUR' corresponds to the tape and reel packaging configuration when placing orders. Confirm that the RoHS3 compliance status aligns with current environmental regulations for your region. Ensure the host system supports the required 4.75V to 5.25V voltage range and utilizes either UART or SPI communication protocols for proper integration.

Selection Notes

Select this model for applications requiring high key counts up to 48 within a single chip. It is suitable for designs needing robust noise immunity through frequency hopping and advanced filtering. Consider the 44-TQFP package dimensions for PCB layout constraints. Verify compatibility with the required panel thickness and electrode materials before finalizing the design.

Part Context

This component belongs to the AT42QT1481 series by Microchip Technology. It is part of the QMatrix family of touch sensor controllers. The 'AUR' suffix typically indicates the tape and reel packaging variant, distinguishing it from tray-packaged versions like the AU suffix.

Replacement Considerations

Check for direct substitutes within the AT42QT1481 series with different packaging suffixes. Evaluate other QMatrix sensors if pinout or interface requirements differ. Consult official Microchip documentation for any discontinued variants or recommended upgrades.