CYAT837AZS98-42002

Overview

The CYAT837AZS98-42002 is a multi-chip capacitive touchscreen controller from the PSoC™ Automotive Multitouch Generation 7XL family. It features a 32-bit Arm® Cortex® CPU and supports up to 98 sense I/Os with 128-pin TQFP packaging. The device operates within an automotive-S temperature range of -40°C to 105°C. Power requirements include a 1.71 V to 1.95 V supply for logic and digital I/Os, and a 3.0 V to 5.5 V supply for analog circuits. Primary communication utilizes an I2C slave interface supporting rates up to 1 Mbps.

Feature Summary

• AEC-Q100 qualified for automotive electronics applications
• Integrated noise-suppression technologies including DisplayArmor and AutoArmor
• DualSense technology enabling water rejection, wet-finger tracking, and glove support
• Supports screen sizes up to 35-inch diagonal with refresh rates up to 120 Hz

Applications

• Automotive touchscreen displays
• In-vehicle infotainment systems
• Digital instrument clusters

Procurement Notes

Verify the ordering suffix 'S' indicates the Automotive-S temperature grade (-40°C to 105°C) rather than the standard Automotive-A grade. Confirm that the specific package type matches the design requirement, as this model uses a 128-pin TQFP. Ensure the host system supports the required dual-voltage power supplies (1.71–1.95 V and 3.0–5.5 V). Check for availability of the Manufacturing Test Kit (MTK) if production testing is required.

Selection Notes

Select this component when high-temperature operation up to 105°C is mandatory. The '98' in the part number specifies 98 sense pins; verify this count against the sensor matrix size. The 'S' suffix denotes the extended temperature range compared to the 'A' suffix. Consider the multi-chip architecture if system power consumption targets require splitting loads between master and slave controllers.

Part Context

This part belongs to the CYAT837X/847X generation, designed specifically for automotive environments. It serves as a master controller capable of managing complex sensor stacks. The product line includes variants with different pin counts and temperature ratings to accommodate various display sizes and environmental constraints within vehicle interiors.

Replacement Considerations

The CYAT837AZA98-42002 is a functional alternative but offers only the Automotive-A temperature range (-40°C to 85°C). If the application requires operation above 85°C, the AZ suffix variant is insufficient. Other suffixes like '77' or '88' indicate fewer sense pins and are not direct replacements for the 98-pin configuration.