AT42QT1060-MMUR

Overview

The AT42QT1060-MMUR is a six-channel QTouch capacitive sensor IC manufactured by Microchip Technology. It supports two to six keys and seven configurable I/O lines with PWM control for LED driving. The device operates on an I2C-compatible interface at 100 kHz and accepts a supply voltage of 1.8 V to 5.5 V. It utilizes patented spread-spectrum charge-transfer technology and includes Adjacent Key Suppression (AKS). The component is housed in a 28-pin, 4 x 4 mm QFN package.

Feature Summary

• Configurable key and I/O architecture
• Spread-spectrum charge-transfer technology
• Integrated signal processing algorithms
• PWM output capability

Applications

• Mobile appliances
• Keypad interfaces
• LED driving systems

Procurement Notes

Verify the specific suffix MMUR against official documentation to confirm reel packaging configuration. Ensure the ordering part number matches the exact pinout and firmware version required for your design. Cross-reference the datasheet revision date to confirm compatibility with current manufacturing standards.

Selection Notes

Select this component when a balance of multiple touch inputs and general-purpose outputs is required. The integrated PWM functionality allows direct LED control without external drivers. Verify that the panel thickness and electrode materials align with the specified sensitivity requirements for the target application environment.

Part Context

This model belongs to the AT42QT10xx series of QTouch capacitive sensor controllers. It shares core signal processing technologies with other members of the family but offers a distinct combination of six sensing channels and seven programmable I/O lines. The device is designed for applications requiring robust touch detection alongside peripheral control capabilities.

Replacement Considerations

Consult official substitution lists for equivalent channel counts and package types. Verify I2C address compatibility and register mapping differences before replacing existing designs with alternative models from the same manufacturer or third-party suppliers.

FAQ

How does the device handle adjacent key presses?

The AT42QT1060 incorporates Adjacent Key Suppression (AKS) technology, which ensures that only the dominant key in a group is reported as touched, preventing false detections during sliding gestures.

Can the I/O lines function as both inputs and outputs?

Yes, the seven I/O lines are individually configurable via the I/O mask register to operate as either digital inputs or outputs, including PWM outputs for LED driving.

What is the purpose of the CHG line?

The Change (CHG) line is an open-drain output that signals the host controller when there is a change in the state of the detected keys or input ports, allowing for efficient interrupt-driven communication.