CYAT81655-100AA48

Overview

The CYAT81655-100AA48 is a capacitive touchscreen controller from Infineon Technologies, part of the TrueTouch family. It integrates an ARM Cortex CPU for advanced signal processing and gesture recognition. The device supports I2C and SPI interfaces for system communication. It operates within a supply voltage range of 1.71 V to 5.5 V and draws 20 mA during operation. The component is housed in a TQFP-100 package suitable for surface mount installation. It functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Integrated ARM Cortex CPU for efficient touch processing
• Supports both I2C and SPI communication protocols
• Wide operating voltage range from 1.71 V to 5.5 V
• Capacitive sensing technology with high resolution

Applications

• Smartphones and mobile devices
• Tablets and portable media players
• Industrial control panels requiring touch input
• Automotive infotainment systems

Procurement Notes

Verify humidity sensitivity handling requirements before assembly, as the component is moisture sensitive. Confirm the specific ordering suffix matches the required packaging format, such as tray quantities. Ensure the supply voltage rails align with the 1.71 V to 5.5 V operational limits. Check for lead time variations due to production cycles which may extend beyond standard delivery windows.

Selection Notes

Select this model when a dedicated processor core is needed for complex gesture algorithms or custom touch mapping. The TQFP-100 package offers ample pin count for multi-touch channels. Consider the 20 mA current consumption against battery life constraints in portable designs. Verify that the host system supports either I2C or SPI interfaces for data exchange.

Part Context

This component belongs to the CYAT8165x series of TrueTouch controllers. It shares architectural similarities with other models in the family but differs in package type and specific interface configurations. The series is designed for high-performance capacitive touch applications requiring robust noise immunity and accurate tracking.

Replacement Considerations

Direct substitutes within the same series include CYAT81655 variants with different suffixes indicating package or temperature changes. Cross-family replacements require verification of pin compatibility and software driver support. Ensure any alternative maintains the ARM Cortex architecture if firmware portability is a constraint.