ATMXT228UD-MAUHA1

Overview

The ATMXT228UD-MAUHA1 is a maXTouch UD Series touchscreen controller IC designed for home appliance applications. It features a unique charge-transfer acquisition engine supporting both mutual and self capacitance measurements to ensure accurate touch classification and tracking. The device supports up to 14 X (transmit) lines and 24 Y (receive) lines, allocating a maximum of 228 nodes for the sensor array. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 56-pin XQFN package measuring 6 × 6 × 0.4 mm.

Feature Summary

• Supports up to 10 concurrent touches with a typical report rate of ≥70 Hz and initial touch latency <18 ms.
• Includes moisture/water compensation capable of handling condensation or water drops up to 22 mm diameter without false touches.
• Features UL/IEC 60730 Class B functional safety support with self-diagnostics and heartbeat signal output.
• Provides I2C interface support for Standard (100 kHz), Fast (400 kHz), and Fast-mode Plus (1 MHz) speeds.

Applications

• Home appliances requiring capacitive touch interfaces
• Devices utilizing on-cell or touch-on display technologies such as TFT, LCD, and OLED
• Applications necessitating compliance with UL/IEC 60730 Class B safety standards

Procurement Notes

Verify that the specific ordering suffix matches the required packaging configuration. The base part number ATMXT228UD-MAUHA1 corresponds to standard tube or tray packaging. If tape and reel packaging is required, confirm the correct suffix (e.g., MAURHA1) with the manufacturer or authorized sales office to ensure compatibility with automated assembly processes.

Selection Notes

Select this component when designing systems requiring up to 228 sensor nodes and multi-touch capability. Ensure the application environment falls within the specified -40°C to +85°C operating temperature range. Verify that the host system can accommodate the 3.3V nominal supply requirements for Vdd, VddIO, and AVdd, and confirm that the I2C bus speed requirements align with the supported Standard, Fast, or Fast-mode Plus modes.

Part Context

This device belongs to the maXTouch UD Series, which is specifically targeted at home appliance markets. It distinguishes itself from automotive-grade variants by its lack of automotive characterization suitability. The 'UD' designation indicates the specific product family architecture optimized for cost-effective, high-performance touch sensing in consumer electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip directly for cross-reference information or alternative components within the maXTouch portfolio that meet similar node count and interface specifications.