ATMXT3432S-S-AT

Overview

The ATMXT3432S-S-AT is a MAXTOUCH AUTO series touchscreen controller integrated circuit designed for automotive applications. It features 3432 reconfigurable touch channels, supporting large displays up to 34 inches in 7:1 format or 20 inches in 16:9 format. The device meets ASIL-A/B functional safety standards and complies with ISO 26262. It includes firmware authentication for secure Over-the-Air updates per ISO 21434:2021. The IC supports I²C and SPI interfaces, operates within a -40°C to +85°C temperature range, and utilizes a 144-LQFP surface-mount package.

Feature Summary

• Supports large curved and free-form touch displays up to 34 inches
• Meets ASIL-A/B functional safety standards
• Enables secure Over-the-Air firmware updates via vehicle main computer
• Integrates firmware authentication for cybersecurity compliance

Applications

• Automotive infotainment systems
• Vehicle instrument clusters
• Center console touch interfaces
• Rear-seat entertainment displays

Procurement Notes

Verify the specific suffix 'AT' against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with existing harness designs for I²C/SPI interfaces. Confirm end-of-life status if applicable, as some variants may be obsolete. Request updated firmware libraries compatible with the latest automotive cybersecurity requirements before integration.

Selection Notes

Select this component when high channel count and large display support are required for automotive environments. Prioritize models with ASIL-B certification if higher safety integrity levels are needed. Consider interface availability on the host microcontroller for I²C or SPI connectivity. Evaluate thermal management capabilities for operation within the specified -40°C to +85°C range.

Part Context

This part belongs to the MAXTOUCH AUTO M1 series, expanding Microchip's automotive touchscreen portfolio. It complements other controllers like the ATMXT3072M1 and ATMXT2496M1 by offering higher channel density. The series focuses on integrating safety and security features directly into the touch controller silicon.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data. Consult Microchip Technology for current lifecycle status and recommended alternatives.