ATMXT336UD-MAURHA1

Overview

The ATMXT336UD-MAURHA1 is a maXTouch® touchscreen controller utilizing a charge-transfer acquisition engine for capacitive sensing. It supports up to 336 nodes across 14 X and 24 Y lines, enabling multi-touch tracking of up to 10 concurrent touches with a typical report rate ≥70 Hz. The device operates on a nominal 3.3V supply (Vdd, VddIO, AVdd) and includes an internal voltage pump generating 6.6V for the XVdd line. It features I2C communication supporting Standard, Fast, and Fast-mode Plus speeds, alongside an SPI debug interface. Operating within a temperature range of -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 moisture compensation for condensation or water drops up to 22 mm diameter.
• Includes UL/IEC 60730 Class B functional safety support with power-on self-diagnostics and heartbeat signal output.
• Features enhanced algorithms for lens bending noise removal, palm suppression, and palm recovery.
• Provides robust noise suppression against ambient, charger, and power-line noise up to 240 V PP.

Applications

• Home appliance interfaces requiring reliable touch input.
• Industrial control panels needing functional safety compliance.
• Displays with TFT, LCD (ITPS, IPS), or OLED technologies.

Procurement Notes

Verify the specific ordering suffix 'R' confirms tape and reel packaging, distinct from the tray-supplied ATMXT336UD-MAUHA1. Confirm firmware revision 1.0.AB compatibility with existing system configurations. Ensure the industrial grade (-40°C to +85°C) meets environmental requirements, as this part is not suitable for automotive characterization.

Selection Notes

Select this controller for designs requiring up to 336 sensor nodes and 10-point multi-touch capability. Ensure the host processor supports I2C at up to 1 MHz or utilizes the SPI debug interface for tuning. Verify that the application stack-up allows for the specified glass or PMMA thicknesses to maintain performance standards.

Part Context

This component belongs to the maXTouch® Adaptive Sensing Touchscreen Technology family. It is designed to work with discrete/out-cell sensors or on-cell/touch-on displays. The device integrates a state-of-the-art CPU to classify and track touches with high accuracy and low latency.

Replacement Considerations

The standard tray version ATMXT336UD-MAUHA1 offers identical electrical and functional specifications but differs only in packaging format.

FAQ

What is the maximum number of concurrent touches supported?

The controller supports tracking up to 10 concurrent touches in real time.

Does the device support functional safety standards?

Yes, it supports UL/IEC 60730 Class B with self-diagnostics and a heartbeat signal output.

How does the controller handle water interference?

It provides moisture compensation that prevents false touches from condensation or water drops up to 22 mm in diameter while maintaining one-finger tracking.