ATMXT449TD-ATRVA2

Overview

The ATMXT449TD-ATRVA2 is an automotive-grade capacitive touchscreen controller from Microchip Technology, packaged in a 100-pin TQFP (14 × 14 × 1 mm). It supports up to 32 transmit and 20 receive lines, allocating a maximum of 448 nodes for touch sensing. The device operates within a temperature range of –40°C to +85°C and utilizes I²C or SPI interfaces. Key electrical specifications include nominal 3.3 V supplies for digital, I/O, and analog domains, with an internal high-voltage pump generating 6.6 V for X-line drive.

Feature Summary

• AEC-Q100 qualified and developed using Automotive SPICE Level 3 certified processes.
• Supports up to 16 concurrent touches with a one-finger reporting rate up to 250 Hz.
• Integrated noise suppression technology handles up to 240 Vpp ambient noise between 1 Hz and 1 kHz.
• Includes on-chip gesture recognition and advanced algorithms for palm recovery and lens bending.

Applications

• Automotive infotainment systems requiring functional safety certification.
• In-vehicle displays supporting glass or PET film front panels.
• Applications necessitating multi-touch and hover detection capabilities.

Procurement Notes

Verify the 'R' suffix indicates tape and reel packaging rather than standard tube or tray supply. Confirm that the 'V2' suffix corresponds to firmware revision 1.0.AE as specified in the product identification system. Ensure the orderable part number matches the required automotive grade sample status for characterization purposes.

Selection Notes

Select this component when AEC-Q100 qualification and CISPR-25 compliance are mandatory. Choose the TQFP package if board space accommodates a 100-pin footprint. Consider the –40°C to +85°C operating range; upgrade to the AB variant if operation up to +105°C is required. Verify interface compatibility with either I²C or SPI protocols.

Part Context

This part belongs to the maXTouch 448-node series, designed for high-performance capacitive sensing. It integrates a charge-transfer acquisition engine and a state-of-the-art CPU for accurate touch classification. The device supports both mutual and self-capacitance measurements to ensure robust touch detection in noisy environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. For alternative packages or extended temperature ranges, consult the manufacturer's full product line for variants such as the UFBGA or XQFN options within the same family.