ATMXT112UD-MAUHA1

Overview

The ATMXT112UD-MAUHA1 is a maXTouch UD Series touchscreen controller featuring a charge-transfer acquisition engine for capacitive sensing. It supports up to 14 X and 24 Y lines, allocating a maximum of 112 nodes for touch sensors. The device operates on a nominal 3.3V supply with an internal 6.6V voltage pump for X line drive. It provides I2C communication (up to 1 MHz) and an SPI debug interface. Operating within -40°C to +85°C, it is housed in a 56-pin XQFN package measuring 6x6x0.4 mm.

Feature Summary

• Supports mutual and self capacitance measurements with up to 10 concurrent touches tracked at ≥70 Hz report rate.
• Includes UL/IEC 60730 Class B functional safety support with self-diagnostics and heartbeat signals.
• Features moisture/water compensation and noise suppression against ambient, charger, and power-line interference.
• Integrates lens bending and palm recovery algorithms to enhance touch accuracy and response.

Applications

• Home appliance control panels
• Industrial equipment interfaces
• Consumer electronics with glass or PET film sensors

Procurement Notes

Verify the specific ordering suffix when sourcing components. The base part number ATMXT112UD-MAUHA1 corresponds to standard packaging (trays), whereas the variant ATMXT112UD-MAURHA1 indicates tape and reel packaging. Confirm package availability directly with Microchip sales offices as identifiers are used for ordering but not printed on the device.

Selection Notes

Select this controller for designs requiring robust multi-touch performance in noisy environments. Ensure the application stack-up utilizes materials compatible with the device's water compensation capabilities. Verify that the host system supports the required I2C speeds and that the 56-pin XQFN footprint aligns with the recommended land pattern specifications.

Part Context

This component belongs to the maXTouch UD Series, specifically designed for home appliance applications. It is part of the broader mXT112 family, which offers varying node counts and interface options. The device utilizes Microchip's patented capacitive sensing method combined with a state-of-the-art CPU for high-accuracy touch classification.

Replacement Considerations

ATMXT112UD-MAURHA1: Identical electrical and functional characteristics; differs only in packaging format (Tape and Reel vs. Tray).