ATMXT144UD-AMBSPIVA1

Overview

The ATMXT144UD-AMBSPIVA1 is a maXTouch touchscreen controller designed for automotive applications. It supports up to 144 nodes, configured with 12 transmit and 24 receive lines, enabling multi-touch tracking of up to 10 concurrent touches. The device operates on a 3.3V supply and features an SPI slave interface with speeds up to 8 MHz. It is qualified to AEC-Q100 Grade 2 standards and functions within a temperature range of -40°C to +105°C. The component is housed in a 56-pin VQFN package measuring 7x7 mm.

Feature Summary

• AEC-Q100 Qualified for Grade 2 automotive environments (-40°C to +105°C)
• Supports up to 144 nodes with 10 concurrent touch tracking
• SPI communication interface operating at frequencies up to 8 MHz
• Integrated moisture compensation and palm recovery algorithms

Applications

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

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm the SPI variant and tray packaging configuration. Ensure that the required firmware revision 1.0.AA is compatible with the target system design before procurement.

Selection Notes

Select this model when an SPI interface is required instead of I2C. Confirm that the application requires Grade 2 temperature specifications (-40°C to +105°C) rather than Grade 3. Verify that the 144-node capacity aligns with the sensor electrode pitch and display size requirements.

Part Context

This part belongs to the mXT144UD-AMB family, which utilizes charge-transfer acquisition technology. It distinguishes itself from the I2C variants by providing an SPI slave interface for higher speed data transfer and includes dedicated debug pins for raw data access during tuning.

Replacement Considerations

Direct replacements include other parts within the mXT144UD-AMB family, such as the ATMXT144UD-AMBI2CVA1, provided the interface difference (SPI vs. I2C) is accommodated in the hardware design.