ATMXT640U-CCU023

Overview

The ATMXT640U-CCU023 is an industrial-grade sample of the maXTouch 640-node touchscreen controller. It features a charge-transfer acquisition engine supporting up to 32 X and 20 Y lines for multi-touch tracking. The device operates on 3.3V supplies with internal voltage pumps generating 6.6V or 9.9V for line drive. It supports I2C interfaces up to 3.4 MHz and SPI debug modes. Packaged in an 88-ball UFBGA (6x6mm), it functions within a -40°C to +85°C range.

Feature Summary

• Supports up to 16 concurrent touches with report rates up to 250 Hz
• Integrated moisture compensation and glove touch support
• I2C interface compatible with HID-I2C standards
• On-chip gesture recognition and palm recovery algorithms

Applications

• Development of capacitive touchscreen systems
• Evaluation of display integration with glass or PET overlays
• Testing of noise suppression and water drop performance

Procurement Notes

This part number identifies an industrial grade sample unit supplied in trays. Verify that the specific engineering sample status meets project requirements, as these units are explicitly noted as not suitable for automotive characterization. Confirm package dimensions and pinout compatibility during the design-in phase.

Selection Notes

Select this component for applications requiring robust multi-touch performance in industrial environments. Ensure the host system provides 3.3V digital and analog supplies. Consider the 88-ball UFBGA footprint constraints and verify that the required node count fits within the 640-node allocation limit.

Part Context

This device belongs to the maXTouch family utilizing patented capacitive sensing technology. It is designed to work with various sensor patterns and overlay materials. The CCU suffix indicates the 88-ball UFBGA package type, while the 023 suffix denotes the specific industrial sample variant.

Replacement Considerations

The ATMXT640U-C4U023 serves as a direct alternative using the thinner 88-ball X1FBGA package. Both share identical firmware revision 1.1.AA and electrical specifications, differing only in physical package height.

FAQ

Is this component suitable for automotive applications?

No, the datasheet explicitly states that this industrial grade sample is not suitable for automotive characterization.

What is the maximum operating temperature?

The device operates within a temperature range of -40°C to +85°C.

Does the device support passive stylus input?

Yes, it supports passive stylus with a 1 mm contact diameter, subject to configuration and sensor design.