ATMXT288UD-AMTRI2CVA1

Overview

The ATMXT288UD-AMTRI2CVA1 is an automotive-grade capacitive touchscreen controller from Microchip Technology's maXTouch family. It supports up to 288 nodes, configured as 12 transmit and 24 receive lines for a single touchscreen array. The device operates within a temperature range of -40°C to +85°C (Grade 3) and utilizes a 56-pin VQFN package measuring 7 x 7 x 0.9 mm. Communication is handled via an I2C slave interface supporting Standard, Fast, and Fast-mode Plus speeds. It features AEC-Q100 qualification and Automotive SPICE Level 3 development processes.

Feature Summary

• Supports up to 10 concurrent touches with real-time tracking and gesture reporting.
• Includes moisture compensation for water drops up to 22 mm diameter and palm recovery algorithms.
• Features noise suppression technology capable of handling up to 240 V PP ambient noise.
• Offers flexible Tx burst frequency selection and configurable waveform shaping to reduce EMC disturbances.

Applications

• Automotive secondary displays including TFT, LCD, and OLED screens.
• Curved glass or PET film front panels in vehicle dashboards.
• Safety-critical touch interfaces requiring automatic sensor diagnostics.

Procurement Notes

Verify the 'R' suffix indicates tape and reel packaging rather than standard tray supply. Confirm the operating temperature grade matches the specific application requirements, as the 'T' variant covers -40°C to +85°C while the 'B' variant extends to +105°C. Ensure the I2C interface requirement aligns with the system design, as SPI variants are available separately.

Selection Notes

Select this part for applications requiring up to 288 sensing nodes with I2C connectivity. Consider the ATMXT288UD-AMBI2CVA1 if the operating environment exceeds +85°C but remains below +105°C. For designs requiring SPI communication instead of I2C, the SPI variant must be selected. Note that key arrays are only supported on the SPI variant; the I2C version is limited to touchscreen functionality.

Part Context

This component belongs to the mXT288UD-AMT/mXT288UD-AMB 1.0 family. It shares the same core sensing engine and package dimensions with the ATMXT288UD-AMTI2CVA1 and ATMXT288UD-AMBI2CVA1, differing primarily in packaging format and temperature rating. It is designed to replace older automotive touch controllers with higher node counts and improved noise immunity.

Replacement Considerations

Direct replacements include ATMXT288UD-AMTI2CVA1 (tray, Grade 3) and ATMXT288UD-AMBI2CVA1 (tray, Grade 2). Verify firmware compatibility when substituting between different temperature grades or packaging types.