ATMXT336UD-MAU001

Overview

The ATMXT336UD-MAU001 is a maXTouch® 336-node touchscreen controller from Microchip Technology, designed for high-performance capacitive sensing. It utilizes a charge-transfer acquisition engine to measure and track up to 10 concurrent touches with low latency. The device supports both mutual and self-capacitance measurements, enabling robust detection in noisy environments or under water condensation. Operating at a nominal 3.3V supply, it features an I2C interface for communication and an SPI debug interface. The component is housed in a 56-pin XQFN package (6x6 mm) and operates within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports up to 14 transmit (X) lines and 24 receive (Y) lines for a maximum of 336 sensor nodes.
• Tracks up to 10 simultaneous finger touches with initial touch latency less than 18 ms.
• Includes moisture compensation algorithms to prevent false touches from 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 and touch-on-display implementations for TFT, LCD (ITPS, IPS), and OLED panels.
• Applications requiring support for non-rectangular sensor designs, such as circular or curved profiles.

Procurement Notes

Verify the ordering suffix when sourcing this component. The base part number ATMXT336UD-MAU001 indicates standard packaging in trays. For tape and reel packaging, the suffix changes to R (e.g., ATMXT336UD-MAUR001). Confirm that the specific package type required for your assembly process matches the ordered variant, as the suffix dictates the physical packaging method rather than the internal die function.

Selection Notes

Select this controller for designs requiring up to 336 nodes and multi-touch capability. Ensure the host system supports I2C communication at Standard, Fast, or Fast-mode Plus speeds. Verify that the application environment falls within the -40°C to +85°C operating range. Consider the 56-pin XQFN footprint dimensions (6x6x0.4 mm) during PCB layout and confirm compatibility with the intended display stack-up and sensor material thicknesses.

Part Context

This component belongs to the maXTouch® family of touchscreen controllers. It is specifically the UD series variant optimized for industrial temperature grades. The device integrates a state-of-the-art CPU and analog sensing pipeline to handle touch classification and tracking efficiently. It serves as a central processing unit for capacitive touch interfaces in consumer electronics and industrial displays.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip's official cross-reference tools or contact sales offices for compatible alternatives within the maXTouch portfolio.