ATMXT144UD-AMBRSPIVA1

Overview

The ATMXT144UD-AMBRSPIVA1 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 SPI slave interface with speeds up to 8 MHz. The device supports up to 12 X (transmit) lines and 24 Y (receive) lines, enabling tracking of up to 10 concurrent touches. It employs a charge-transfer acquisition engine for mutual and self-capacitance measurements, ensuring robust touch detection in noisy environments.

Feature Summary

• AEC-Q100 qualified and developed following Automotive SPICE Level 3 certified processes
• Supports up to 144 nodes with 10 concurrent multi-touch tracking capability
• Integrated noise suppression technology compliant with CISPR 25 standards
• Features on-chip gesture reporting and advanced algorithms for palm recovery and lens bending

Applications

• Automotive infotainment systems requiring high reliability
• On-cell or touch-on-display solutions for TFT, LCD, and OLED panels
• Applications utilizing curved glass or PET front panel materials

Procurement Notes

Verify the specific ordering suffix 'R' indicates tape and reel packaging rather than standard tray supply. Confirm that the SPI variant selection aligns with system interface requirements, as the I2C variant offers different communication protocols. Ensure compatibility with the required firmware revision 1.0.AA for intended functionality.

Selection Notes

Select this component when automotive grade (-40°C to +105°C) performance is mandatory. Choose the SPI interface variant if higher data throughput up to 8 MHz is required compared to the I2C options. Consider the 56-pin VQFN package dimensions (7x7x0.9 mm) for PCB layout constraints and thermal management needs.

Part Context

This part belongs to the mXT144UD-AMT/mXT144UD-AMB family, which implements patented capacitive sensing methods. The 'AMB' designation specifically denotes the extended temperature range suitable for Grade 2 automotive environments, distinguishing it from the standard Grade 3 AMT variants.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip directly for cross-reference information or alternative components within the maXTouch portfolio.