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Product Detailed Parameters
- Description：TrueTouch
- Series：-
- Mfr：Infineon Technologies
- Package：Tape & Reel (TR)
- Touchscreen：-
- Resolution (Bits)：-
- Interface：-
- Voltage Reference：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Current - Supply：-
- Grade：-
- Qualification：-
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Overview
The Infineon Technologies CYAT81688-100AS77KAT is a capacitive touchscreen controller based on the PSoC architecture and TrueTouch technology. It features an ARM Cortex CPU core with a 32-bit resolution for signal processing. The device supports both I2C and SPI interface types, ensuring flexible connectivity options for host systems. It operates within a supply voltage range of 1.71 V to 5.5 V and draws a typical operating current of 20 mA. Designed for surface mount applications, it is housed in a TQFP-100 package. The component functions reliably across an extended temperature range from -40°C to +85°C.
Feature Summary
- Integrated ARM Cortex CPU core for advanced signal processing
- Supports I2C and SPI communication interfaces
- TrueTouch capacitive touch sensing technology
- Operates on supply voltages between 1.71 V and 5.5 V
Applications
- Capacitive touchscreen displays
- Human-machine interface (HMI) panels
- Consumer electronics input devices
Procurement Notes
Verify the specific suffix 'KAT' against official Infineon documentation to confirm any distinct marking or tape-and-reel specifications compared to standard tray packaging variants. Ensure compliance with moisture sensitivity level requirements during storage and handling procedures prior to assembly.
Selection Notes
Select this component when a dedicated microcontroller-based touch solution is required rather than a simple ASIC. The integrated ARM Cortex core allows for custom firmware implementation. Verify that the system design accommodates the TQFP-100 footprint and that the host processor supports either I2C or SPI protocols for data exchange.
Part Context
This part belongs to the CYAT81688 series of TrueTouch controllers. These devices are designed to replace traditional resistive touch solutions with higher durability and clarity offered by capacitive sensing. The series integrates the touch controller logic and processing capabilities into a single chip to reduce board space and component count.
Replacement Considerations
Direct pin-to-pin replacements may be limited due to the specific integration of the ARM Cortex core. Check for other members of the CYAT81688 family with compatible packages and interface configurations. Firmware migration efforts should be considered if substituting with different MCU-integrated touch controllers.
