AT42QT2161-MMU

Overview

The AT42QT2161-MMU is a capacitive touch controller integrating QTouch and QMatrix technologies. It supports up to 16 independent touch keys and configurable sliders or wheels. The device operates within a voltage range of 1.8V to 5.5V DC. It features an I2C-compatible interface for configuration and includes multiple GPIOs with PWM functionality. The component utilizes spread-spectrum modulation for EMI immunity and offers self-calibration capabilities.

Feature Summary

• Integrates QTouch and QMatrix sensing technologies in a single device
• Supports simultaneous operation of discrete keys and sliding/wheel interfaces
• Includes internal LED drivers controlled via PWM outputs
• Features adjacent key suppression to prevent false triggers

Applications

• Mobile phone multimedia controls
• Personal media players
• Handheld gaming devices
• Digital cameras

Procurement Notes

Verify the specific suffix MMU against the manufacturer's current datasheet to confirm package type and pinout compatibility. Ensure the ordering code matches the exact revision required for your design, as suffixes may indicate variations in packaging or testing standards without altering core functionality.

Selection Notes

Select this component when a design requires both button inputs and linear slider controls within a single IC. It is suitable for battery-powered applications due to its low standby current consumption. Verify that the system voltage falls within the 1.8V to 5.5V operating range before integration.

Part Context

This part belongs to Atmel's comprehensive range of capacitive touch controllers based on Quantum Research Group's charge-transfer technology. It complements other models like the AT42QT2160 by offering similar integrated functionalities for complex human-machine interfaces in compact form factors.

Replacement Considerations

The AT42QT2160 is a closely related model within the same family. Verify pin-to-pin compatibility and software register mapping before substitution. Check if the specific suffix differences between MMU variants affect mechanical mounting or thermal performance.