CYAT81685-100AA77Z

Touch Screen Controllers Overview

The CYAT81685-100AA77Z is a capacitive touchscreen controller from Infineon Technologies, part of the TrueTouch Standard TS3xxx family. It integrates an ARM Cortex CPU and supports I2C and SPI interfaces. The device operates within a supply voltage range of 1.71 V to 5.5 V, with a typical operating current of 20 mA. It features a 32-bit resolution and includes four ADC inputs for sensor signal processing. Designed for surface-mount installation, it is housed in a TQFP-100 package. The component functions reliably across an industrial temperature range from -40°C to +85°C.

Touch Screen Controllers Feature Summary

• Integrated ARM Cortex CPU for advanced touch processing
• Dual interface support via I2C and SPI protocols
• Four dedicated ADC inputs for high-resolution sensing
• Industrial temperature operation from -40°C to +85°C

Touch Screen Controllers Applications

• Capacitive touchscreen controllers for consumer electronics
• Industrial human-machine interface (HMI) panels
• Automotive infotainment systems requiring robust touch input

Touch Screen Controllers Procurement Notes

Verify the specific suffix 'AA77Z' against official Infineon documentation to confirm environmental compliance and packaging details. Confirm that the TQFP-100 package matches the target PCB footprint. Check for moisture sensitivity levels as indicated in the datasheet before assembly planning.

Touch Screen Controllers Selection Notes

Select this model when a programmable ARM-based controller is required for complex gesture recognition or multi-touch applications. Ensure the system design accommodates the 1.71 V to 5.5 V supply range. Verify that the host processor can support either I2C or SPI communication protocols for data exchange.

Touch Screen Controllers Part Context

This component belongs to the CYAT81685 series, which utilizes the TrueTouch technology platform. It is designed to replace older resistive touch solutions with higher durability and clarity. The series offers scalable performance for various display sizes through firmware configuration.

Touch Screen Controllers Replacement Considerations

Cross-reference with other CYAT81685 variants such as CYAT81685-100AS77Z for extended temperature ranges up to +105°C. Ensure pin compatibility and software driver availability when substituting with other members of the TrueTouch Standard TS3xxx family.