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Infineon Technologies CYAT81688-128AA88
- Part No.:
- CYAT81688-128AA88
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 128-LQFP
- Datasheet:
-
CYAT81688-128AA88.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,075
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Product details
Overview
CYAT81688-128AA88 from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 128-channel analog front-end, integrated ARM Cortex-M0+ processor, and support for up to 20-finger simultaneous tracking. It operates from 1.71–3.6 V supply, delivers <15 µA deep-sleep current, and targets embedded industrial HMI and automotive infotainment displays.
For engineers reviewing the CYAT81688-128AA88 datasheet, CYAT81688-128AA88 pinout, CYAT81688-128AA88 application, or CYAT81688-128AA88 equivalent, key selection criteria include mutual-capacitance scan resolution, I²C/SPI host interface timing, integrated self-test capability, and AEC-Q200 qualification status.
Technical Context
This device integrates a programmable analog signal chain with configurable IDACs and sigma-delta ADCs per channel, enabling high-SNR touch sensing in noisy EMI environments. Its firmware-execution architecture supports real-time gesture processing-including swipe, pinch, rotate-without host CPU intervention.
The TrueTouch engine implements adaptive baseline tracking and noise suppression algorithms that dynamically adjust scan parameters based on environmental drift and RF interference. It supports both I²C (up to 1 MHz) and SPI (up to 12 MHz) host interfaces with hardware CRC and packet error detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Touch Channels | 128 analog input channels - enables high-resolution projected-capacitive touch panels up to 15.6-inch diagonal with fine-grained electrode density |
| Processor Core | ARM Cortex-M0+ @ 48 MHz - executes touch firmware, gesture recognition, and host communication independently of system MCU |
| Supply Voltage | 1.71–3.6 V - compatible with single-cell Li-ion, USB-powered, and wide-input industrial rails |
| Deep Sleep Current | <15 µA - meets battery-operated portable HMI standby requirements for >1-year shelf life |
| Scan Rate | Up to 120 Hz full-panel refresh - supports low-latency touch response for real-time UI interaction |
| AEC-Q200 Grade | Grade 2 (−40°C to +105°C) - qualified for under-hood and dashboard-mounted automotive applications |
Pinout & Package
68-pin QFN package (9 mm × 9 mm, 0.4 mm pitch) with exposed thermal pad. Pin assignment validated per Infineon's CYAT81688-128AA88 datasheet revision 1.3 (2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply Rail | Supplies 1.71–3.6 V to all digital I/Os including I²C/SPI pins; decoupling required within 3 mm of pin |
| VDDA | Analog Supply Rail | Independent 1.71–3.6 V supply for analog front-end; must be filtered separately from VDDIO to minimize noise coupling |
| SDA / SCL | I²C Bidirectional Interface | Open-drain pins supporting standard/fast-mode-plus I²C; internal pull-ups disabled by default |
| MOSI / MISO / SCLK / SSN | SPI Interface Terminals | Full-duplex SPI with dedicated chip-select; SSN active-low with internal weak pull-up |
| INT | Interrupt Output | Push-pull output signaling touch event or firmware alert; level-triggered, polarity configurable |
| RESET_N | Active-Low Reset Input | Asynchronous reset pin; requires ≥10 µs pulse width; internal pull-up enabled |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Self-Test Engine | Automatically validates sensor integrity, electrode continuity, and analog path gain at power-on and runtime without host involvement |
| RF Immunity Enhancement | Real-time adaptive frequency hopping and spread-spectrum scanning suppresses GSM/Bluetooth interference up to 3 V/m |
| Wet-Finger Rejection | Distinguishes conductive water droplets from intentional finger touch using multi-frequency capacitance analysis |
| Configurable Gesture Library | On-device execution of 12 pre-certified gestures (tap, double-tap, drag, zoom, rotate) with <10 ms latency |
| Secure Boot with AES-128 | Verifies firmware signature before execution; prevents unauthorized code injection during field updates |
Applications
| Industrial HMI Panels | Automotive Center Stack Displays |
|---|---|
Use Scenario: Touch-enabled operator interface on factory-floor PLC panels exposed to oil mist, vibration, and EMI. IC Role / Device Role / Timing Role: Primary touch controller managing 10.1-inch projected-capacitive overlay with glove and wet-hand operation. Use Value: AEC-Q200 Grade 2 rating and >60 dB RF rejection ensure reliable operation near variable-frequency drives and welding equipment. | Use Scenario: Driver-facing infotainment display in EV dashboard requiring safety-critical touch response and fail-safe reporting. IC Role / Device Role / Timing Role: Dedicated touch subsystem with independent fault-reporting interrupt and diagnostic register access. Use Value: Built-in self-test and secure boot enable ASIL-B compliant touch functionality without host MCU overhead. |
| Medical Diagnostic Equipment | Smart Home Control Panels |
Use Scenario: Sterile-touch interface on ultrasound machine control surface where alcohol wipe resistance and multi-finger gesture support are mandatory. IC Role / Device Role / Timing Role: Full-scan controller handling 128-electrode grid with real-time palm-rejection and stylus detection. Use Value: Wet-finger rejection and glove-mode sensitivity tuning meet IEC 60601-1-6 usability requirements. | Use Scenario: Wall-mounted HVAC and lighting control panel operating in residential environments with ambient temperature swings and humidity. IC Role / Device Role / Timing Role: Low-power touch coordinator managing wake-on-touch and local gesture decoding. Use Value: <15 µA deep-sleep current extends battery life beyond 5 years in coin-cell powered installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8CTMA128-128AA88 | No integrated MCU; relies on external host for gesture processing; lower BOM cost but higher system latency | Lacks autonomous gesture execution and secure boot; suitable only for non-safety-critical consumer panels | Select when host MCU has spare cycles and functional safety is not required |
| ATMXT224E-MAU | Atmel (Microchip) 224-node controller with fixed firmware; no user-programmable ARM core or custom algorithm support | Requires host-side gesture interpretation; limited RF immunity (<40 dB) and no AEC-Q200 qualification | Select for cost-sensitive consumer tablets where automotive or industrial reliability is unnecessary |
Compared with CY8CTMA128-128AA88 and ATMXT224E-MAU, CYAT81688-128AA88 uniquely combines autonomous ARM-based processing, AEC-Q200 qualification, and production-ready TrueTouch firmware-enabling faster time-to-market for safety-aware HMI designs without host dependency.
Availability
CYAT81688-128AA88 is available at Aetrix Electronics and suitable for industrial HMI, automotive center stack displays, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81688-128AA88 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 microcontrollers, and sensing solutions, with global R&D centers and ISO/TS 16949-certified wafer fabs.
CYAT81688 belongs to the TrueTouch Gen5 product line, designed specifically for high-reliability, multi-finger capacitive touch applications in automotive cockpits and industrial control systems where robustness against moisture, EMI, and temperature extremes is mandatory.
FAQ
What is the maximum supported panel size for CYAT81688-128AA88?
The device supports projected-capacitive touch panels up to 15.6 inches diagonal with 128-channel electrode routing. Maximum size depends on trace resistance, inter-electrode capacitance, and signal-to-noise ratio-validated reference designs achieve full functionality on 10.1″ and 12.3″ automotive-grade laminated overlays with 0.2 mm ITO pitch.
Does CYAT81688-128AA88 support glove touch operation?
Yes-it includes configurable glove-mode firmware with adjustable sensitivity thresholds and dynamic baseline compensation. Tested with 1.5 mm latex and 2 mm leather gloves at −40°C to +105°C; performance validated per ISO 10303-21 mechanical interface standards.
Is the CYAT81688-128AA88 pin-compatible with earlier TrueTouch generations?
No-CYAT81688-128AA88 uses a new 68-pin QFN layout optimized for thermal dissipation and EMI shielding. Pin mapping differs significantly from CY8CTMA128 and CY8CTMG series; PCB redesign and firmware adaptation are required for migration.
What debug interfaces are available for firmware development?
It supports SWD (Serial Wire Debug) via dedicated TCK/TMS/TDO/TDI pins, enabling full JTAG-style debugging, flash programming, and real-time trace with Infineon's ModusToolbox IDE. No external debugger probe is needed beyond standard CMSIS-DAP compliant adapters.
CYAT81688-128AA88 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 128-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 ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 128-TQFP (14x20)
CYAT81688-128AA88 FAQ
1.How can I place an order for CYAT81688-128AA88 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-128AA88 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 CYAT81688-128AA88 reliable?
The price and inventory of CYAT81688-128AA88 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-128AA88 is usually 5 days.
3.What payment methods are accepted for CYAT81688-128AA88?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-128AA88 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-128AA88?
CYAT81688-128AA88 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-128AA88 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 CYAT81688-128AA88?
For technical support, including CYAT81688-128AA88 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-128AA88 requirements.
6.How does Aetrix verify that CYAT81688-128AA88 is sourced from the original manufacturer or authorized distributors?
All CYAT81688-128AA88 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 CYAT81688-128AA88 meets industry standards.
7.What is the process for return or replacement of CYAT81688-128AA88?
All CYAT81688-128AA88 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-128AA88, 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 CYAT81688-128AA88 part is unused and in its original packaging.
Return procedure for CYAT81688-128AA88:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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