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Home › Manufacturer › Microchip launched the world's first safety-certified capacitive touchscreen controller series for the home appliance market
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Microchip launched the world's first safety-certified capacitive touchscreen controller series for the home appliance market

SemiMediaEdit
November 18, 2020

Microchip Technology Inc. today announced its maXTouch®MXT336UD-MAUHA1 capacitive touch screen controller family, which is the only touch screen controller on the market that provides pre-certified Class B firmware, allowing designers to meet the European IEC 60730 and American UL 60730 Class B requirements in kitchen touch screen equipment, ensuring the use of safety devices in household appliances.

The family includes three controllers, the MXT112UD-MAUHA1, the MXT228UD-MAUHA1 and the MXT336UD-MAUHA1, each fulfilling different screen size needs, ranging from 2-to 8-inches. 

The Class B certified touch controllers offer unique safety-related features that enable system shut off through an intuitive soft button on a touchscreen, removing the requirement for an external safety certified stop or cancel button and associated microcontroller (MCU). They also allow an appliance to detect a touchscreen or appliance failure and shut down automatically through a variety of self-testing capabilities. For example, if the glass breaks on a cooktop, the touchscreen will turn dark and shut off the machine, eliminating accidental damage in the home. As the number of touch enabled home appliances continue to increase, the MXT336UD-MAUHA1 family shifts the required safety functionality to a simplified single touchscreen interface, helping OEMs reduce costs and improve time to market.

“Due to the risk of house fires caused by home appliances, appliance manufacturers must add functional safety to their machines, and Microchip’s MXT336UD-MAUHA1 touchscreen controller family is already certified for these required safety standards,” said Fanie Duvenhage, vice president of Microchip’s human machine interface business unit. “Integrating Class B certification into our touch controllers eases the design and qualification process for touch enabled appliances, ultimately putting safety first, while reducing costs and enabling modern user interface solutions.”

In addition, this new family leverages a high signal to noise ratio (SNR) design and proprietary differential mutual acquisition scheme. This allows the machine to reliably detect and track multiple fingers on surfaces exposed to moisture, water, grease and more — even if the user is wearing gloves.

Pricing and Availability

The MXT336UD-MAUHA1 family is available in volume production starting at $1.82 in 10,000-unit quantities. More information please visit https://www.microchip.com/wwwproducts/en/ATMXT336UD.

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