ATMXT144UD-AMBI2CVA1

Overview

The ATMXT144UD-AMBI2CVA1 is a maXTouch 144-node touchscreen controller from Microchip Technology, designed for automotive applications. It operates within a temperature range of -40°C to +105°C and utilizes an I2C interface supporting Standard (100 kHz), Fast (400 kHz), and Fast-mode Plus (1 MHz) speeds. The device features a 56-pin VQFN package measuring 7 × 7 × 0.9 mm. It supports up to 12 X lines and 24 Y lines, enabling tracking of up to 10 concurrent touches with a typical report rate of ≥70 Hz. Key electrical parameters include a nominal 3.3V supply for digital, I/O, and analog sections, and a 6.6V internal high-voltage drive for X lines.

Feature Summary

• AEC-Q100 qualified and developed following Automotive SPICE Level 3 certified processes.
• Supports mutual and self capacitance measurements with moisture/water compensation for reliable touch detection.
• Integrated noise suppression technology compliant with CISPR 25 standards.
• Includes on-chip gesture reporting and enhanced algorithms for lens bending and palm recovery.

Applications

• Automotive touchscreen displays
• In-vehicle infotainment systems
• Dashboard control interfaces

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product identification system to ensure correct temperature grade and packaging configuration. Confirm that the I2C variant matches the required communication protocol for the target design. Check for any recent revisions or updates to the datasheet DS40002162B before finalizing procurement specifications.

Selection Notes

Select this component when an AEC-Q100 qualified controller with I2C connectivity is required for automotive environments operating up to +105°C. Ensure the application supports the 56-pin VQFN footprint and can accommodate the necessary external components for the 6.6V internal voltage pump if used. Verify that the sensor electrode pitch and stack-up are compatible with the device's tuning capabilities.

Part Context

This part belongs to the mXT144UD-AMB series, which represents the Grade 2 (-40°C to +105°C) temperature variant of the maXTouch 144-node controller family. It is distinct from the AMT variant, which is rated for -40°C to +85°C. The 'I2C' designation in the part number specifies the communication interface, differentiating it from SPI-based variants within the same package and temperature range.

Replacement Considerations

Direct replacements within the same package and interface include other parts from the mXT144UD-AMB I2C family, such as ATMXT144UD-AMBI2CVAO. Ensure any substitute maintains the AEC-Q100 qualification and Automotive SPICE Level 3 development process compliance for automotive safety requirements.