CYAT81688-128AS88

Touch Screen Controllers Overview

The CYAT81688-128AS88 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 with CMOS input types. The device operates within a supply voltage range of 1.71 V to 5.5 V and draws 20 mA during operation. It features a 32-bit resolution and includes four ADC inputs. Designed for surface-mount installation, it is housed in a TQFP-128 package and functions reliably across a temperature range of -40°C to +105°C.

Touch Screen Controllers Feature Summary

• Integrated Arm Cortex CPU architecture
• Dual interface support: I2C and SPI
• Wide operating voltage range (1.71 V to 5.5 V)
• Automotive-grade temperature capability (-40°C to +105°C)

Touch Screen Controllers Applications

• Automotive infotainment systems
• Multi-touch display controllers
• Human-machine interface (HMI) panels

Touch Screen Controllers Procurement Notes

Verify moisture sensitivity levels before handling, as the component is classified as sensitive. Confirm the specific suffix AS88 corresponds to the required temperature grade and packaging format. Ensure compatibility with existing PCB footprints for the TQFP-128 package. Cross-reference the latest datasheet revision for any updates to electrical characteristics or pin definitions prior to final design approval.

Touch Screen Controllers Selection Notes

Select this model when high-resolution touch control with integrated processing is required. The TQFP-128 package offers sufficient pins for complex sensor arrays. Verify that the system power supply can maintain stability within the 1.71 V to 5.5 V range. Consider the 20 mA current consumption for battery-powered applications if applicable. Ensure the host processor supports the selected I2C or SPI communication protocol.

Touch Screen Controllers Part Context

This component belongs to the CYAT81688 series of TrueTouch controllers. Variants such as CYAT81688-100AA61 share similar core specifications but differ in package type (TQFP-100) and maximum operating temperature (+85°C). The AS88 suffix specifically denotes the 128-pin variant with extended automotive temperature ratings. This distinguishes it from lower-pin-count or commercial-grade alternatives within the same product line.

Touch Screen Controllers Replacement Considerations

Direct substitutes include other CYAT81688 variants like CYAT81688-100AA61, provided the reduced pin count and lower temperature rating are acceptable. Verify pin-to-pin compatibility if switching between TQFP-100 and TQFP-128 packages. No alternative part numbers are confirmed in the provided data.