AT42QT2160-MMUR

Overview

The AT42QT2160-MMUR is a capacitive touch sensor IC designed for matrix layouts, supporting up to 16 keys and one slider constructed from 2 to 8 keys. It operates on an I2C-compatible interface at 100 kHz with a supply voltage range of 1.8 V to 5.5 V. The device features patented spread-spectrum charge-transfer technology, providing self-calibration, auto drift compensation, and noise filtering. It includes three dedicated GPIOs and eight shared GPOs with PWM control for LED driving. The component is housed in a 28-pin 4 × 4 mm QFN package.

Feature Summary

• Patented spread-spectrum charge-transfer technology for high EMI immunity
• Integrated signal processing including self-calibration and adjacent key suppression
• Configurable GPIO and GPO outputs with individual PWM control capabilities

Applications

• Laptop input devices
• Mobile phone interfaces
• Consumer appliance controls
• PC peripheral buttons

Procurement Notes

Verify the specific revision level required for your design implementation. The datasheet documentation explicitly applies only to revision 4R0 chips. Confirm that the ordering suffix corresponds to the correct tape and reel packaging format for automated assembly processes.

Selection Notes

Select this component when a matrix layout is required to minimize pin count for multiple touch inputs. Ensure the application environment allows for the necessary PCB trace lengths and electrode spacing. Verify that the host system supports the I2C protocol for configuration and data retrieval.

Part Context

This part belongs to the AT42QT21xx series of QTouch controllers. It utilizes Quantum Research Group's transverse mode charge-transfer sensing technology. The device integrates all necessary signal processing functions to provide stable sensing under varying environmental conditions without external amplifiers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.