CYAT81685-100AA77

Touch Screen Controllers Overview

The CYAT81685-100AA77 is a capacitive touchscreen controller from Infineon Technologies, part of the TrueTouch 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 maximum operating current of 20 mA. It features a 32-bit resolution and includes four ADC inputs. Designed for surface mount installation, it is housed in a TQFP-100 package and functions reliably across a temperature range of -40°C to +85°C.

Touch Screen Controllers Feature Summary

• Integrated Arm Cortex CPU architecture
• Supports I2C and SPI communication interfaces
• Operates on supply voltages between 1.71 V and 5.5 V
• Includes four dedicated ADC input channels

Touch Screen Controllers Applications

• Capacitive touchscreen systems
• Human-machine interface (HMI) controllers
• General-purpose sensing applications

Touch Screen Controllers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via official documentation before integration. Ensure storage conditions account for humidity sensitivity requirements specified in the datasheet to maintain device integrity during handling and assembly processes.

Touch Screen Controllers Selection Notes

Select this model when a TQFP-100 package is required for the specific PCB layout constraints. Verify that the application environment remains within the -40°C to +85°C operational temperature range. Ensure the system power supply can provide stable voltage between 1.71 V and 5.5 V while supporting up to 20 mA current draw for proper controller functionality.

Touch Screen Controllers Part Context

This component belongs to the CYAT81685 series, which utilizes the TrueTouch technology platform. The suffix '100' indicates the TQFP-100 package variant, distinguishing it from other pin-count options like the TQFP-128 version. It serves as a specialized microcontroller solution designed specifically for touch sensing applications requiring integrated processing capabilities.

Touch Screen Controllers Replacement Considerations

The CYAT81685-128AA88 is a related model within the same series but utilizes a TQFP-128 package. Substitution requires verification of pin compatibility and physical footprint differences. No other direct cross-model substitutes are confirmed in available public documentation.