CYAT81689-128AA88Z

Touch Screen Controllers Overview

The CYAT81689-128AA88Z is a capacitive touchscreen controller from Infineon Technologies, part of the PSoC™ Automotive Multitouch Generation 6XL 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. The component is housed in a TQFP-128 package and is designed for surface-mount installation. It supports multi-touch gestures and thick overlay applications.

Touch Screen Controllers Feature Summary

• Integrates Arm® Cortex® CPU for advanced processing capabilities
• Supports I2C and SPI communication interfaces
• Capable of detecting up to 10 simultaneous touch points
• Includes four dedicated ADC inputs for sensor connectivity

Touch Screen Controllers Applications

• Automotive human-machine interface (HMI) systems
• Smart sensing applications requiring robust touch detection
• General-purpose embedded control systems

Touch Screen Controllers Procurement Notes

Verify the specific suffix AA88Z against official Infineon documentation to confirm environmental compliance and packaging details. Confirm that the TQFP-128 package matches the target PCB footprint. Check for moisture sensitivity levels and recommended reflow profiles prior to assembly. Ensure the supplier provides valid traceability documents for automotive-grade components.

Touch Screen Controllers Selection Notes

Select this model when a 128-pin form factor is required for higher channel counts or complex integration needs compared to smaller packages. Compare the 128-pin TQFP against the 100-pin variant if pin count constraints allow. Verify that the 5.5 V maximum supply voltage aligns with the system power architecture. Consider the 20 mA operating current for thermal management and power budget calculations.

Touch Screen Controllers Part Context

This component belongs to the CYAT8168X series, which represents Infineon's Generation 6XL multitouch technology. The series is optimized for automotive environments, offering features such as glove touch support and water rejection. The 128-pin version provides expanded connectivity options relative to the 100-pin counterparts within the same family.

Touch Screen Controllers Replacement Considerations

Direct substitutes within the same family include CYAT81689-100AS77Z and CYAT81689-100AA77Z, though these utilize a 100-pin TQFP package rather than the 128-pin configuration. Pin compatibility must be verified before substitution due to the difference in package size and pin count.