CYAT81685-100AS77Z

Touch Screen Controllers Overview

The CYAT81685-100AS77Z 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 applications, it is housed in a TQFP-100 package and functions reliably across an extended temperature range from -40°C to +105°C.

Touch Screen Controllers Feature Summary

• Integrated ARM Cortex CPU for advanced touch processing
• Dual interface support via I2C and SPI protocols
• Extended industrial temperature operation (-40°C to +105°C)
• Four dedicated ADC inputs for high-resolution sensing

Touch Screen Controllers Applications

• Industrial control panels requiring wide temperature tolerance
• Automotive infotainment systems
• Medical equipment interfaces
• Consumer electronics with robust environmental demands

Touch Screen Controllers Procurement Notes

Verify component authenticity through authorized Infineon distributors or certified partners. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to PCB assembly. Ensure storage conditions adhere to JEDDEC standards to prevent humidity-related damage during soldering processes.

Touch Screen Controllers Selection Notes

Select this model when extended temperature performance up to +105°C is required, distinguishing it from commercial variants like the CYAT81685-100AA77Z which are rated to +85°C. Ensure the design accommodates the TQFP-100 footprint and provides necessary power rails within the 1.71V to 5.5V range.

Touch Screen Controllers Part Context

This component belongs to the CYAT81685 series of TrueTouch controllers. It shares core architecture with other members such as CYAT81685-100AA77Z but differs in thermal grading. The 'S' suffix typically denotes the extended industrial temperature grade compared to standard commercial grades found in other series members.

Touch Screen Controllers Replacement Considerations

Direct pin-compatible alternatives within the same package include CYAT81685-100AA77Z, though note the reduced maximum operating temperature (+85°C vs +105°C). Verify firmware compatibility if migrating between different revisions of the TrueTouch Standard TS3xxx family.