ATMXT144UD-AMTRI2CVA1

Overview

The ATMXT144UD-AMTRI2CVA1 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, Fast, and Fast-mode Plus speeds. The device features a 56-pin VQFN package (7 × 7 × 0.9 mm) and supports up to 10 concurrent touches with a typical report rate of ≥70 Hz. It includes AEC-Q100 qualification and Automotive SPICE Level 3 certification.

Feature Summary

• AEC-Q100 qualified and developed following Automotive SPICE Level 3 certified processes
• Supports up to 144 nodes with 12 X lines and 24 Y lines for touchscreen and key arrays
• I2C slave interface with Standard (100 kHz), Fast (400 kHz), and Fast-mode Plus (1 MHz) modes
• Integrated moisture compensation and palm recovery algorithms for robust touch detection

Applications

• Automotive infotainment systems requiring multi-touch input
• Vehicle instrument clusters with curved glass or PET film sensors
• On-cell or touch-on display integration for TFT, LCD, and OLED panels

Procurement Notes

Verify the ordering suffix 'R' confirms tape and reel packaging as specified in the product identification system. Confirm the 'AMB' designation aligns with the required -40°C to +105°C operating temperature grade. Ensure the I2C variant matches the host controller's communication protocol requirements before procurement.

Selection Notes

Select this part for designs requiring AEC-Q100 compliance and high-temperature operation up to +105°C. The I2C interface is suitable for systems prioritizing pin count reduction over the SPI variant. Consider the 56-pin VQFN footprint for PCB layout constraints and ensure support for the required sensor stack-up configuration.

Part Context

This component belongs to the mXT144UD-AMT/mXT144UD-AMB family of maXTouch controllers. The 'AMB' suffix indicates the Grade 2 temperature range (-40°C to +105°C), while 'R' specifies tape and reel packaging. It serves as the automotive-grade counterpart to the commercial AMT variant.

Replacement Considerations

ATMXT144UD-AMBI2CVAO is the tray-packaged equivalent with identical electrical specifications. For SPI interface requirements, consider the ATMXT144UD-AMTRSPIVAO variant. Verify firmware revision compatibility when substituting within the mXT144UD family.