CYAT837AZS77-42002

Overview

The CYAT837AZS77-42002 is a multi-chip capacitive touchscreen controller from the PSoC Automotive Multitouch Generation 7XL series. 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 includes AutoArmor for electromagnetic emissions and immunity, DualSense for water rejection, and an integrated DSP for data processing. It operates on logic/digital I/O supplies of 1.71 to 1.95 V and 3.0 to 5.5 V, with an analog supply of 3.0 to 5.5 V. Power consumption ranges from 174 mW (2-chip) to 260 mW (3-chip).

Feature Summary

• Automotive Electronics Council AEC-Q100 qualified.
• Supports screen sizes up to 35-inch diagonal with 6-mm electrode pitch.
• Features AutoArmor technology for improved electromagnetic emissions and immunity.
• Includes DualSense for water rejection and wet-finger tracking.

Applications

• Automotive electronics applications requiring high reliability.
• Multichip capacitive touchscreen systems in vehicles.
• Displays supporting multitouch glove interaction.

Procurement Notes

Verify the specific ordering code suffix against the official Infineon datasheet to confirm package type and temperature range. Ensure compatibility with the intended host communication interface rates, which include I2C slave modes at 100 kbps, 400 kbps, and 1 Mbps. Confirm power supply requirements match the system design for both digital and analog rails.

Selection Notes

Select this component for automotive-grade applications needing robust noise suppression and glove support. Consider the number of sense pins required, as this model supports up to 296 sense pins and 10320 intersections. Evaluate the multi-chip solution architecture to determine if a 2-chip or 3-chip configuration best fits the power and performance constraints.

Part Context

This part belongs to the CYAT837X/847X family of PSoC Automotive Multitouch Generation 7XL controllers. These devices are designed for flexible integration into various sensor stackups, including plastic, glass, and metal mesh substrates. The family offers register-configurable options and supports field upgrades via bootloader.

Replacement Considerations

Check for other members of the CYAT837X/847X family with different pin counts or feature sets. Verify that any substitute maintains the same AEC-Q100 qualification and compatible package dimensions for direct replacement.

FAQ

What is the maximum refresh rate supported by the CYAT837AZS77-42002?

The device supports a configurable refresh rate up to 120 Hz.

Does the CYAT837AZS77-42002 support glove operation?

Yes, it supports multitouch with thin gloves up to 1 mm thick and two fingers with thick gloves up to 5 mm thick.

What communication interfaces are available?

The primary host communication interface is I2C, supporting slave rates of 100 kbps, 400 kbps, and 1 Mbps.