CYAT837AZA77-42002

Overview

The CYAT837AZA77-42002 is a multi-chip capacitive touchscreen controller from the PSoC Automotive Generation 7XL family. It features a 32-bit Arm Cortex CPU and supports up to ten fingers with thin gloves or two fingers with thick gloves. The device operates within an ambient temperature range of -40°C to 85°C (Automotive-A). Power consumption varies by configuration, ranging from 174 mW for a 2-chip solution to 260 mW for a 3-chip setup. Supply voltages include 1.71 V to 1.95 V and 3.0 V to 5.5 V for logic/digital I/Os, and 3.0 V to 5.5 V for analog supplies.

Feature Summary

• AEC-Q100 qualified automotive-grade multitouch controller
• Supports up to 296 sense pins and 10320 intersections
• Integrated DSP for faster scanning and noise filtering
• Features AutoArmor, DualSense water rejection, and glove tracking

Applications

• Automotive infotainment systems
• Vehicle instrument clusters
• Rear-seat entertainment displays

Procurement Notes

Verify the specific ordering suffix against the official Infineon datasheet to confirm package type and temperature grade. Confirm that the required number of sense I/Os matches the '77' designation in the part number. Ensure system design accounts for the specified power supply ranges and interface requirements before procurement.

Selection Notes

Select this component for applications requiring high SNR and robust environmental performance in automotive settings. Consider the 128-pin TQFP package dimensions (14 x 20 x 1.4 mm) for PCB layout. Evaluate the need for master versus slave configuration if integrating into a multi-chip solution.

Part Context

This part belongs to the CYAT837X/847X series, designed for large screen sizes up to 35 inches diagonal. It supports various sensor substrates including glass, PET, and metal mesh, compatible with LCD, AMOLED, and IPS displays.

Replacement Considerations

Other parts in the CYAT837X/847X family offer different sense pin counts (e.g., 61, 72, 88, 98) or temperature grades (Automotive-S). Verify compatibility with existing firmware and hardware designs when substituting.