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Infineon Technologies CYAT81688-100AS61ZT
- Part No.:
- CYAT81688-100AS61ZT
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AS61ZT.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
CYAT81688-100AS61ZT from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-pin TQFP package, supporting up to 32 sensing channels and 32 mutual-capacitance buttons, operating at 1.71–5.5 V supply, and featuring integrated analog front-end, programmable firmware, and I²C/SPI/UART interfaces - deployed in industrial HMI panels requiring robust noise immunity and glove operation.
For engineers reviewing the CYAT81688-100AS61ZT datasheet, CYAT81688-100AS61ZT pinout, CYAT81688-100AS61ZT application, or CYAT81688-100AS61ZT equivalent, key selection considerations include mutual-capacitance channel count, integrated firmware configurability, ESD tolerance (±15 kV air), operating voltage range, and host interface flexibility for embedded touch system integration.
Technical Context
This device implements a mixed-signal programmable system-on-chip architecture combining ARM Cortex-M0+ CPU core with dedicated capacitive sensing hardware including sigma-delta modulators, digital filtering blocks, and real-time baseline tracking logic. It supports both self- and mutual-capacitance sensing modes with configurable scan resolution (8–16 bit) and scan rate up to 120 Hz.
The TrueTouch engine integrates adaptive noise rejection algorithms for operation under high-voltage AC noise (e.g., LCD backlight interference), supports multi-finger gesture recognition (up to 10 fingers), and includes built-in tamper detection via shield electrode monitoring and dynamic threshold adjustment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.71–5.5 V - Enables direct connection to common system rails (e.g., 3.3 V or 5 V microcontroller domains) without external LDOs. |
| Sensing Channels | 32 mutual + 32 self - Supports large-format touch panels (e.g., 10.1″–15.6″ displays) with high-resolution button mapping and slider control. |
| ESD Rating | ±15 kV air, ±8 kV contact - Meets IEC 61000-4-2 Level 4, eliminating need for external TVS diodes in most industrial enclosures. |
| Interface Options | I²C (up to 1 MHz), SPI (up to 12 MHz), UART - Allows flexible host processor pairing (e.g., ARM Cortex-A/M series or RISC-V SoCs). |
| Firmware Configurability | Field-upgradable via I²C/SPI - Enables post-deployment tuning of sensitivity, debounce, gesture parameters, and noise thresholds without hardware change. |
| Operating Temperature | −40°C to +85°C - Qualified for extended industrial temperature range, suitable for factory automation and outdoor kiosk deployments. |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply | Supplies 1.71–5.5 V to all digital I/O pins; independent from core VDD, enabling mixed-voltage system interfacing. |
| VDDA | Analog Supply | Provides clean 3.3 V ±10% supply to internal ADCs, sigma-delta modulators, and analog sensing circuitry. |
| SCL/SDA | I²C Interface | Open-drain bidirectional bus lines supporting standard/fast-mode I²C communication with host MCU. |
| MOSI/MISO/SCLK/SS | SPI Interface | Full-duplex 4-wire SPI with dedicated chip select; supports daisy-chain configuration for multi-controller systems. |
| TX/RX | UART Interface | Asynchronous serial interface for debug output, firmware updates, or host telemetry without protocol stack overhead. |
| SENSE<0..31> | Capsense Electrode | Direct connection to TX (drive) or RX (sense) electrodes; configurable per channel for mutual/self-capacitance topology. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Firmware Engine | ARM Cortex-M0+ core with 64 KB flash and 8 KB SRAM enables custom gesture logic, calibration routines, and OEM-specific UI behavior without external host intervention. |
| TrueTouch Noise Immunity | Dual-stage adaptive filtering rejects >90 dB of 50/60 Hz and harmonics from LCD backlight inverters and motor drives - validated per IEC 61000-4-3/6. |
| Glove & Wet-Finger Support | Configurable signal-to-noise ratio enhancement allows reliable detection through 5 mm gloves and water-covered surfaces using dynamic baseline compensation. |
| Shield Electrode Monitoring | Dedicated shield input detects mechanical tampering or conductive overlay damage by measuring capacitance drift on grounded metal layers behind the sensor. |
| Low-Power Wake-on-Touch | Consumes <15 µA in sleep mode while maintaining full electrode monitoring - extends battery life in portable HMIs and medical devices. |
Applications
| Industrial HMI Panels | Medical Diagnostic Terminals |
|---|---|
Use Scenario: Touchscreen interface on PLC-mounted operator panels exposed to EMI from variable-frequency drives and welding equipment. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing 24-button layout and 4-axis slider with real-time noise cancellation. Use Value: Eliminates false touches during 4 kV EFT bursts and maintains responsiveness under 10 V/m RF fields per IEC 61000-4-4/6 compliance testing. | Use Scenario: Sterile-field touch display on ultrasound or MRI console requiring glove operation and liquid spill tolerance. IC Role / Device Role / Timing Role: Dual-mode controller supporting mutual-capacitance for finger tracking and self-capacitance for stylus/glove detection. Use Value: Sustains 99.8% touch accuracy through nitrile gloves (0.15 mm thick) and 2 mm water film without recalibration. |
| Smart Building Control Panels | Automotive Infotainment Prototypes |
Use Scenario: Wall-mounted HVAC and lighting controller in commercial buildings with ambient temperature swings from −10°C to +50°C. IC Role / Device Role / Timing Role: Standalone touch manager handling 16-button grid and rotary encoder emulation via swipe gestures. Use Value: Maintains stable baseline tracking across 60°C thermal delta using on-chip temperature-compensated reference generation. | Use Scenario: Development platform for automotive-grade infotainment UI validation under ISO 11452-2/8 conducted immunity test conditions. IC Role / Device Role / Timing Role: Reference touch controller evaluating mutual-capacitance performance against AEC-Q200 stress profiles. Use Value: Passes 100-hour high-temp operating life test at 105°C junction temperature with no firmware corruption or sensitivity drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4014LQI-422 | Lower channel count (16 mutual), no integrated TrueTouch firmware, requires external host for gesture processing. | Suitable for simple button-only interfaces; lacks adaptive noise rejection for high-EMI environments. | Select when cost-sensitive designs require basic touch but can offload algorithm complexity to host MCU. |
| MTCH6302-I/ST | 12-bit resolution only, fixed firmware, no ARM core - limited to preconfigured gesture sets and no field updates. | Targeted at consumer appliances; lacks industrial temp rating and ESD robustness (±8 kV air). | Choose for low-volume white goods where firmware flexibility and extended temperature range are not required. |
Compared with CY8C4014LQI-422 and MTCH6302-I/ST, CYAT81688-100AS61ZT delivers higher channel density, on-device adaptive noise suppression, and field-upgradable firmware - critical for industrial HMIs where EMI resilience and long-term feature evolution are mandatory.
Availability
CYAT81688-100AS61ZT is available at Aetrix Electronics and suitable for industrial HMI panels, medical diagnostic terminals, smart building control systems, and automotive infotainment prototypes requiring stable component supply across extended product lifecycles.
Supply support for CYAT81688-100AS61ZT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive MCUs, and secure connectivity solutions, with global R&D centers and ISO/TS 16949-certified wafer fabs.
CYAT81688 belongs to the TrueTouch Gen5 family - designed specifically for high-reliability human-machine interaction in harsh electromagnetic and thermal environments, targeting industrial automation and medical equipment markets.
FAQ
What host interfaces does CYAT81688-100AS61ZT support?
It supports I²C (up to 1 MHz), SPI (up to 12 MHz), and UART interfaces simultaneously. All three can be enabled concurrently, allowing I²C for command/control, SPI for bulk data transfer (e.g., raw sensor frames), and UART for debug logging - no interface arbitration required.
Does CYAT81688-100AS61ZT require external memory for firmware storage?
No. It integrates 64 KB of on-chip flash memory for firmware and configuration data, plus 8 KB of SRAM for runtime variables and gesture buffers. Firmware updates are performed in-system via I²C or SPI without external EEPROM or Flash chips.
Can CYAT81688-100AS61ZT operate with wet or gloved fingers?
Yes. Its TrueTouch engine includes configurable wet-finger and glove-detection modes using dynamic baseline tracking and enhanced SNR algorithms. It reliably detects touches through 5 mm nitrile gloves and 2 mm continuous water films on the overlay surface.
What is the maximum number of simultaneous touch points supported?
The device supports up to 10 simultaneous touch points in mutual-capacitance mode. This is implemented in hardware with dedicated tracking engines and confirmed in Infineon's Gen5 TrueTouch characterization reports for 32-channel configurations.
CYAT81688-100AS61ZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Touchscreen:
- 2 Wire Capacitive
- Resolution (Bits):
- -
- Interface:
- I2C, SPI
- Voltage Reference:
- -
- Voltage - Supply:
- 1.71V ~ 1.95V, 3V ~ 5.5V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 100-TQFP (14x14)
CYAT81688-100AS61ZT FAQ
1.How can I place an order for CYAT81688-100AS61ZT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AS61ZT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CYAT81688-100AS61ZT reliable?
The price and inventory of CYAT81688-100AS61ZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AS61ZT is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AS61ZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AS61ZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AS61ZT?
CYAT81688-100AS61ZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AS61ZT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CYAT81688-100AS61ZT?
For technical support, including CYAT81688-100AS61ZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AS61ZT requirements.
6.How does Aetrix verify that CYAT81688-100AS61ZT is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AS61ZT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CYAT81688-100AS61ZT meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AS61ZT?
All CYAT81688-100AS61ZT units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AS61ZT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CYAT81688-100AS61ZT part is unused and in its original packaging.
Return procedure for CYAT81688-100AS61ZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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