CYAT81655-64AS48

Overview

The CYAT81655-64AS48 is a capacitive touchscreen controller from Infineon Technologies, part of the TrueTouch PSOC-based family. It integrates an Arm Cortex CPU for advanced signal processing and gesture recognition. The device supports I2C and SPI interfaces for host communication. Electrical specifications include a supply voltage range of 1.71 V to 5.5 V and a typical operating current of 20 mA. It operates within a temperature range of -40°C to +85°C and is housed in a TQFP-64 surface-mount package.

Feature Summary

• Integrated Arm Cortex CPU for programmable touch processing
• Supports I2C and SPI communication protocols
• Capacitive sensing technology with high resolution
• Wide operating voltage range (1.71 V to 5.5 V)

Applications

• Smartphones and mobile devices
• Tablets and portable media players
• Industrial control panels

Procurement Notes

Verify the specific suffix 'AS48' against official Infineon documentation to confirm tape-and-reel packaging versus tray options, as datasheets may list generic suffixes. Confirm moisture sensitivity levels and reflow soldering profiles prior to assembly. Check for end-of-life notices or recommended new designations on the manufacturer's website.

Selection Notes

Select this component when a dedicated microcontroller is required for complex gesture algorithms and custom touch mapping. Ensure the host system supports the required I2C or SPI clock speeds. Verify that the TQFP-64 footprint matches the PCB layout constraints and thermal requirements for the target application environment.

Part Context

This model belongs to the CYAT8165x series of TrueTouch controllers. It shares core architecture with variants like CYAT81655-64AA48 but differs in packaging or shipping configuration indicated by the suffix. The series is designed for high-performance multi-touch applications requiring low power consumption and robust noise immunity.

Replacement Considerations

Direct pin-to-pin replacements within the same series include CYAT81655-64AA48, subject to packaging verification. Cross-series migration to CYAT8168x models requires schematic review due to potential interface or pinout differences.