ATMXT336UD-MAUR001

Overview

The ATMXT336UD-MAUR001 is a maXTouch® 336-node touchscreen controller IC from Microchip Technology. It utilizes a charge-transfer acquisition engine to implement patented capacitive sensing, supporting both mutual and self capacitance measurements for robust touch detection. The device features a 56-pin XQFN package (6 × 6 × 0.4 mm) and operates on a nominal 3.3V digital supply with an internal high-voltage pump generating 6.6V for X line drive. It supports I2C interfaces up to 1 MHz and includes an SPI debug interface. Operating within the industrial temperature range of –40°C to +85°C, it enables multi-touch tracking with configurable power and speed optimization.

Feature Summary

• Supports up to 336 nodes with 14 transmit lines and 24 receive lines for flexible sensor configurations.
• Tracks up to 10 concurrent touches in real time with typical report rates ≥70 Hz and initial latency <18 ms.
• Includes moisture compensation algorithms to prevent false touches from condensation or water drops up to 22 mm diameter.
• Features noise suppression technology capable of handling up to 240 V PP ambient noise between 1 Hz and 1 kHz.

Applications

• Discrete/out-cell sensors using glass or PET film materials.
• On-cell/touch-on-display solutions including TFT, LCD (ITPS, IPS), and OLED panels.
• Applications requiring support for curved profiles or non-rectangular sensor designs such as circular shapes or cutouts.

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format. The 'R' suffix indicates Tape and Reel delivery, whereas the absence of this suffix typically denotes tray packaging. Confirm the firmware revision and die lot traceability codes against project requirements before finalizing procurement orders.

Selection Notes

Select this component when a solution supporting up to 336 sensor nodes is required. Ensure the design accommodates the 56-pin XQFN footprint with a 0.35 mm pitch. Verify that the host system provides the necessary 3.3V supplies for Vdd, VddIO, and AVdd, and confirm compatibility with the desired I2C clock speeds up to 1 MHz.

Part Context

This part belongs to the maXTouch® family of capacitive sensing controllers. The ATMXT336UD-MAUR001 variant specifically denotes the industrial grade (-40°C to +85°C) packaged in a 56-pin XQFN format and supplied in tape and reel. It serves as the processing core for translating raw sensor data into accurate touch coordinates.

Replacement Considerations

ATMXT336UD-MAU001: Identical functional specifications but supplied in trays instead of tape and reel.

FAQ

What is the maximum number of concurrent touches supported?

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

How does the device handle environmental noise?

It employs noise suppression technology to combat ambient, charger, and power-line noise, supporting up to 240 V PP between 1 Hz and 1 kHz.

Can the device operate with thick gloves?

Yes, it supports multi-finger detection through 6 mm glass or 3 mm PMMA, which is equivalent to 2.7 mm PMMA thickness.