CYAT81688-100AS71Z

Touch Screen Controllers Overview

The CYAT81688-100AS71Z is a capacitive touchscreen controller from Infineon Technologies, part of the TrueTouch PSOC-based series. It operates within a supply voltage range of 1.71 V to 5.5 V and supports I2C and SPI interfaces. The device features a 32-bit resolution and includes four ADC inputs. Designed for surface-mount installation, it is housed in a TQFP-100 package. The component functions reliably across an extended temperature range from -40°C to +105°C.

Touch Screen Controllers Feature Summary

• Capacitive touchscreen controller with 32-bit resolution
• Dual interface support: I2C and SPI
• Integrated 4-channel ADC inputs
• Extended industrial temperature range (-40°C to +105°C)

Touch Screen Controllers Applications

• Industrial control panels requiring robust touch input
• Medical devices operating in variable environmental conditions
• Automotive infotainment systems

Touch Screen Controllers Procurement Notes

Verify moisture sensitivity classification before handling, as the component is listed as sensitive. Confirm the specific suffix 'S71' corresponds to the required temperature grade and packaging configuration for your assembly line. Cross-reference the datasheet revision to ensure compatibility with existing firmware drivers.

Touch Screen Controllers Selection Notes

Select this model when an extended operating temperature up to +105°C is required, distinguishing it from commercial variants like the AA77Z which are rated for +85°C. Ensure the host system supports the necessary I2C or SPI protocols. Verify that the TQFP-100 footprint matches the PCB layout constraints.

Touch Screen Controllers Part Context

This component belongs to the CYAT81688 family of TrueTouch controllers. Variants within this series differ primarily by package type (e.g., TQFP-100 vs TQFP-128) and operating temperature ranges. The AS71Z suffix specifically denotes the SMD/SMT packaging and the extended temperature capability compared to standard commercial grades.

Touch Screen Controllers Replacement Considerations

Direct substitutes include other CYAT81688 variants such as CYAT81688-100AS77Z, provided the application does not require the higher +105°C rating. For lower temperature requirements, CYAT81688-100AA77Z may be suitable. Always verify pinout and electrical specifications against the target replacement.