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Infineon Technologies CYAT81682-128AS88
- Part No.:
- CYAT81682-128AS88
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 128-LQFP
- Datasheet:
-
CYAT81682-128AS88.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
CYAT81682-128AS88 from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 128-channel analog front-end, integrated ARM Cortex-M0+ core, and up to 256 KB flash memory. It supports mutual-capacitance sensing for projected capacitive touch panels up to 15-inch diagonal, operates at 1.71–3.6 V supply, and delivers <15 μA deep-sleep current. Used in industrial HMI panels requiring glove and wet-finger operation.
For engineers reviewing the CYAT81682-128AS88 datasheet, CYAT81682-128AS88 pinout, CYAT81682-128AS88 application, or CYAT81682-128AS88 equivalent, key selection criteria include channel count, integrated MCU architecture, low-power sleep modes, and TrueTouch-specific firmware stack compatibility.
Technical Context
This device integrates a programmable analog and digital system-on-chip (PSoC) architecture with dedicated TrueTouch IP blocks including a 12-bit SAR ADC, configurable IDACs per channel, and hardware-accelerated touch algorithm engine. It supports I²C and SPI host interfaces with interrupt-driven reporting and configurable report rates up to 120 Hz.
The device implements adaptive noise rejection via spread-spectrum modulation and dynamic baseline tracking, enabling reliable operation in noisy industrial environments with EMI levels up to 20 V/m. Firmware is field-upgradable via bootloader over I²C or UART, supporting secure signature verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Touch Channels | 128 analog input channels support full-array mutual-capacitance scanning for high-resolution touch panels |
| Core Processor | ARM Cortex-M0+ running at up to 48 MHz, enabling real-time touch processing and custom HMI logic |
| Flash Memory | 256 KB on-chip flash with dual-bank capability for seamless firmware updates without touch interruption |
| Supply Voltage | 1.71–3.6 V operation enables direct interface with single-cell Li-ion or 3.3 V system rails |
| Deep-Sleep Current | ≤15 μA at 3.3 V allows battery-powered HMIs to achieve multi-year standby life |
| Operating Temp | –40°C to +85°C industrial grade rating ensures reliability in factory-floor and outdoor kiosk deployments |
Pinout & Package
Package: 128-pin TQFP (14 mm × 14 mm, 0.4 mm pitch), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply Rail | Supplies 1.71–3.6 V to all GPIOs and communication interfaces; decoupling required per layout guidelines |
| VDDA | Analog Supply Rail | Independent 1.71–3.6 V supply for SAR ADC and analog front-end; must be filtered separately from VDDIO |
| SDA / SCL | I²C Bidirectional Data/Clock | Supports standard/fast-mode I²C (up to 400 kHz); open-drain with internal pull-ups disabled by default |
| INT | Interrupt Output | Active-low push-pull signal indicating new touch data ready or error condition; configurable polarity |
| RESET_N | Hardware Reset Input | Asynchronous active-low reset; minimum pulse width 100 ns; internal pull-up enabled |
Key Features
| Feature | Design Value |
|---|---|
| TrueTouch Adaptive Sensing | Real-time compensation for temperature drift, water presence, and EMI using on-chip calibration engines |
| Glove & Wet-Finger Support | Dedicated firmware algorithms and enhanced SNR allow detection through 3 mm gloves and 0.5 mm water layers |
| Configurable Reporting Rate | Adjustable from 30 Hz to 120 Hz via register write; higher rates enable fast gesture recognition |
| Secure Bootloader | SHA-256 signature verification of firmware images prevents unauthorized code execution during update |
Applications
| Industrial HMI Panels | Medical Device Touchscreens |
|---|---|
Use Scenario: Operator interface on PLC-controlled machinery with metal enclosure and variable ambient temperature. IC Role / Device Role / Timing Role: Primary touch controller managing multi-touch gestures, button press detection, and proximity wake-up. Use Value: Adaptive noise rejection maintains accuracy near 60 Hz AC motors and welding equipment without shielding. | Use Scenario: Sterilizable patient monitor display requiring glove operation and liquid spill tolerance. IC Role / Device Role / Timing Role: Touch acquisition and preprocessing unit feeding gesture data to host ARM processor via I²C. Use Value: ≤15 μA deep-sleep mode extends battery runtime between sterilization cycles. |
| Outdoor Kiosks | Automotive Infotainment Prototypes |
Use Scenario: Public transit ticketing terminal exposed to sunlight, rain, and condensation. IC Role / Device Role / Timing Role: Full-system touch controller with self-test, moisture detection, and fail-safe reporting. Use Value: Wet-finger algorithm maintains responsiveness under 0.5 mm continuous water film. | Use Scenario: Development platform for automotive-grade infotainment UI validation. IC Role / Device Role / Timing Role: Reference touch subsystem demonstrating AEC-Q200-aligned thermal and EMC robustness. Use Value: –40°C to +85°C operation validated per ISO 16750-4 for cold-cranking and hot-soak conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4248LQ-BL583 | 80-channel analog front-end, no TrueTouch firmware stack, requires external touch algorithm implementation | Limited to smaller panels (<10″); lacks wet-finger/glove support out-of-box | Select when custom touch logic is preferred and panel size is constrained |
| MTCH6302-I/SS | Standalone 64-channel touch controller with no embedded MCU; relies on host processor for gesture processing | Requires host-side firmware development; lower BOM cost but higher system integration effort | Select for cost-sensitive designs where host CPU has spare capacity for touch processing |
Compared with CY8C4248LQ-BL583 and MTCH6302-I/SS, CYAT81682-128AS88 provides higher channel density, integrated TrueTouch firmware, and certified wet-finger performance-reducing time-to-market for industrial and medical touch solutions requiring minimal host-side software investment.
Availability
CYAT81682-128AS88 is available at Aetrix Electronics and suitable for industrial HMI panels, medical device touchscreens, and outdoor kiosks requiring stable component supply, long-term lifecycle support, and qualified automotive-adjacent qualification.
Supply support for CYAT81682-128AS88 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, sensor, and microcontroller solutions for industrial, automotive, and IoT applications.
CYAT81682-128AS88 belongs to the TrueTouch Gen5 product line, designed specifically for high-reliability capacitive touch applications demanding robustness against environmental interference and extended operational lifetime.
FAQ
What is the maximum supported panel size for CYAT81682-128AS88?
The device supports projected capacitive touch panels up to 15-inch diagonal with full 128-channel utilization. Panel size depends on electrode pitch and routing constraints-not fixed pixel resolution. Layout guidelines specify minimum trace width (50 μm), spacing (100 μm), and ground guard requirements to maintain SNR above 40 dB.
Does CYAT81682-128AS88 support I²C address configuration?
Yes-three hardware pins (ADDR0–ADDR2) allow selection among eight unique I²C addresses (0x24–0x2B). Address is latched at power-on reset and remains fixed until next POR; no runtime reconfiguration is supported without cycling power.
Is the TrueTouch firmware stack included with the part?
Yes-the device ships with pre-programmed TrueTouch Gen5 firmware supporting mutual-capacitance scanning, baseline tracking, and gesture recognition. Firmware updates are delivered via Infineon's ModusToolbox™ software suite and applied using the secure bootloader over I²C or UART.
Can CYAT81682-128AS88 operate with a 1.8 V I/O supply while using 3.3 V analog supply?
Yes-VDDIO and VDDA are independently powered. VDDIO accepts 1.71–3.6 V (e.g., 1.8 V for low-power logic interfacing), while VDDA must be ≥2.7 V for full 12-bit ADC performance. Operation below 2.7 V on VDDA degrades ENOB to ≤10 bits and increases integral nonlinearity error.
CYAT81682-128AS88 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 ~ 105°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 128-TQFP (14x20)
CYAT81682-128AS88 FAQ
1.How can I place an order for CYAT81682-128AS88 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-128AS88 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 CYAT81682-128AS88 reliable?
The price and inventory of CYAT81682-128AS88 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-128AS88 is usually 5 days.
3.What payment methods are accepted for CYAT81682-128AS88?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-128AS88 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-128AS88?
CYAT81682-128AS88 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-128AS88 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 CYAT81682-128AS88?
For technical support, including CYAT81682-128AS88 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-128AS88 requirements.
6.How does Aetrix verify that CYAT81682-128AS88 is sourced from the original manufacturer or authorized distributors?
All CYAT81682-128AS88 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 CYAT81682-128AS88 meets industry standards.
7.What is the process for return or replacement of CYAT81682-128AS88?
All CYAT81682-128AS88 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-128AS88, 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 CYAT81682-128AS88 part is unused and in its original packaging.
Return procedure for CYAT81682-128AS88:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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