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A turnkey touch controller is a quick and easy way to upgrade a mechanical button to a modern touch button or display. With the introduction of the 12-button MTCH2120 touch controller, Microchip Technology Inc. Provides designers with a direct way to implement touch button functionality in the user interface. This low-power, water-resistant turnkey touch device integrates with Microchip's unified ecosystem to simplify the design process and facilitate the transition between other turnkey solutions and McU-based touch implementations. The MTCH2120 is the first in a family of I2C-based touch controllers that support a comprehensive design ecosystem.

The MTCH2120 provides a stable touch experience that is not affected by noise events and humidity, while being highly flexible to adapt to individual product requirements. The Low power function groups buttons to reduce scanning activity and reduce power consumption while keeping the buttons in full operation.

The functions and ecosystem of MTCH2120 include:

• Easy Tune automatically adjusts sensitivity and filter levels based on real-time noise assessment, eliminating the need for cumbersome threshold adjustments

• An MPLAB Harmony host code configurator plug-in that connects directly to Microchip MCUS and MPUs without the need to implement the I2C protocol on the host

• Design validation with MPLAB data visualization tools

• I2C port extender function

• Access to and compatibility with Microchip's touch library minimizes the need for complex software engineering and firmware processing by designers, helping to shorten design cycles

The MTCH2120 evaluation board, the on-board SAM C21 main MCU, can be instantly integrated into the prototype design

Rodger Richey, Microchip's vice president of development Systems and University programs, said: "The MTCH2120 combines decades of touch experience with Microchip's comprehensive ecosystem of support and development tools to deliver an advanced touch experience that is easy to use. It's a win-win solution. Developers can achieve the highest level of touch robustness and great design flexibility without tedious tuning or programming."

The MTCH2120 is the first product in Microchip's MTCH family to feature I2C, and the recently released MTCH1010, MTCH1030, and MTCH1060 have similarly powerful touch performance and a simple GPIO interface. The MTCH2XXX series will add more solutions with bus control flexibility, making the ease of use offered by the design ecosystem applicable to more markets. Please visit the website to learn more about all of Microchip's turnkey touch solutions.

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