ATMXT2952TD-C2UEN1

Overview

The ATMXT2952TD-C2UEN1 is a maXTouch touchscreen controller featuring a charge-transfer acquisition engine for high-accuracy multi-touch tracking. It supports up to 2911 nodes, enabling configurations with 41 transmit and 71 receive lines. The device operates on a 3.3V digital supply (AVdd) and 1.8V to 3.3V I/O (VddIO), with an external drive voltage (XVdd) up to 9.2V. It integrates I2C and USB HID interfaces, supporting report rates ≥110 Hz and initial touch latency <20 ms. Encased in a 162-ball UFBGA package (10 × 5 × 0.6 mm), it functions within a temperature range of –40°C to +85°C.

Feature Summary

• Supports up to 16 concurrent touches with self and mutual capacitance measurements.
• Includes moisture compensation for water drops up to 22 mm diameter.
• Features encrypted configuration parameters and touch coordinate reports using customer security keys.
• Provides PWM output for display backlight control or haptic feedback.

Applications

• On-cell and touch-on-display implementations for OLED and LCD panels.
• Discrete out-cell sensors using glass or PET film materials.
• Systems requiring stylus support with passive inputs.
• Applications needing integrated gesture reporting and lens bending noise removal.

Procurement Notes

Verify the specific ordering suffix 'EN1' against official Microchip documentation, as standard part numbers typically utilize suffixes like '002' or 'R002'. Confirm availability through authorized sales offices, as distribution channels may vary by region. Ensure compliance with RoHS standards and industrial grade specifications during procurement.

Selection Notes

Select this controller for designs requiring high node counts up to 2911 and flexible sensor patterns. Ensure the host interface matches either I2C or USB HID requirements. Verify that the system power budget accommodates the 3.3V analog and digital supplies plus the up to 9.2V external X-line drive. Confirm mechanical constraints fit the 162-ball UFBGA footprint.

Part Context

This component belongs to the maXTouch TD Series, designed for advanced capacitive sensing solutions. It utilizes patented technology to distinguish between intentional touches and environmental noise. The device is intended for integration into consumer electronics and industrial displays where reliable multi-touch performance is critical.

Replacement Considerations

Consult Microchip for direct substitutes. Standard variants include ATMXT2952TD-C2U002 (tray) and ATMXT2952TD-C2UR002 (tape and reel). Verify firmware revision compatibility and pin-to-pin equivalence before substitution.

FAQ

What is the maximum number of concurrent touches supported?

The device supports up to 16 concurrent touches tracked in real time.

How does the controller handle moisture interference?

It features moisture compensation that prevents false touches from condensation or water drops up to 22 mm in diameter while maintaining one-finger tracking.

What interfaces are available for communication?

The controller supports I2C (Standard, Fast, Fast-mode Plus, High Speed) and USB HID interfaces.