ATMXT641TD-ABVA2

Overview

The ATMXT641TD-ABVA2 is an automotive-grade capacitive touchscreen controller from Microchip Technology, part of the maXTouch family. It supports up to 640 nodes with a maximum configuration of 32 transmit and 20 receive lines. The device enables multi-touch tracking for up to 16 concurrent touches at report rates up to 250 Hz. It integrates advanced algorithms for glove support, water compensation, and hover detection. Operating within a temperature range of –40°C to +105°C, it utilizes I2C or SPI interfaces and is housed in a 100-pin TQFP package.

Feature Summary

• AEC-Q100 qualified for Grade 2 (-40°C to +105°C) automotive applications
• Supports up to 16 simultaneous touch points with high-speed reporting
• Integrated noise suppression and moisture/water compensation technologies
• Dual interface options: I2C (up to 3.4 MHz) and SPI (up to 8 MHz)

Applications

• Automotive infotainment systems
• Vehicle instrument clusters
• Center console control panels

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System documentation. Suffixes such as 'R' indicate tape and reel packaging, while others may denote tray supply. Confirm that the firmware revision matches the design requirements before procurement.

Selection Notes

Select this model for applications requiring extended temperature operation up to +105°C. Ensure the sensor stack-up design is compatible with the specified glass or plastic thickness limits. Validate that the host system supports the required I2C or SPI communication speeds for optimal performance.

Part Context

This component belongs to the mXT641TD-A series, designed specifically for automotive environments. It adheres to Automotive SPICE Level 3 certified processes and meets CISPR-25 compliance standards for electromagnetic interference.

Replacement Considerations

The mXT641TD-AT variant serves as a functional alternative but operates within a limited temperature range of –40°C to +85°C. Verify thermal requirements before substituting.

FAQ

What is the maximum number of concurrent touches supported?

The controller supports tracking up to 16 concurrent touches in real time.

Does the device support glove interaction?

Yes, it supports single-finger glove touches up to 5 mm thickness and multiple-finger touches up to 1.5 mm thickness, subject to stack-up design.

What are the available communication interfaces?

The device supports I2C-compatible slave interfaces up to 3.4 MHz and SPI slave interfaces up to 8 MHz.