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Infineon Technologies CYAT81682-128AA88
- Part No.:
- CYAT81682-128AA88
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 128-LQFP
- Datasheet:
-
CYAT81682-128AA88.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:3,028
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Product details
Overview
CYAT81682-128AA88 from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 128-channel analog front-end, integrated ARM Cortex-M0+ MCU, and support for up to 10-finger simultaneous tracking in mobile and industrial HMI applications.
For engineers reviewing the CYAT81682-128AA88 datasheet, CYAT81682-128AA88 pinout, CYAT81682-128AA88 application, or CYAT81682-128AA88 equivalent, key selection criteria include channel count, finger tracking resolution, I²C/SPI interface compatibility, and operating voltage range (1.71–3.6 V).
Technical Context
This device integrates a programmable analog signal chain with digital processing resources, enabling configurable sensor scanning, noise rejection via adaptive filtering, and real-time gesture engine execution on-chip. It supports both self-capacitance and mutual-capacitance sensing modes with programmable scan timing and resolution.
The embedded Cortex-M0+ operates at up to 48 MHz, runs firmware for touch algorithm execution, and interfaces directly with host processors via I²C (up to 1 MHz) or SPI (up to 12 MHz), with dedicated GPIOs for interrupt and reset signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Touch Channels | 128 analog input channels support high-resolution touch panels up to 15-inch diagonal with fine electrode pitch. |
| Max Simultaneous Fingers | 10-finger tracking enables multi-gesture UIs including pinch-to-zoom and rotate without latency or ghosting. |
| Supply Voltage | 1.71–3.6 V operation allows direct integration with modern SoC I/O domains and battery-powered designs. |
| Interface Protocols | I²C (1 MHz max) and SPI (12 MHz max) provide flexible host connectivity with hardware-accelerated packet framing. |
| Operating Temp | –40°C to +85°C rating supports deployment in automotive infotainment and industrial control panels. |
| Firmware Memory | 128 KB flash and 16 KB SRAM enable field-upgradable touch algorithms and custom gesture logic. |
Pinout & Package
Package: 121-pin BGA (6 mm × 6 mm, 0.4 mm pitch) with thermal pad for enhanced power dissipation in continuous scanning mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O supply rail | Supplies 1.71–3.6 V to all digital I/Os and interface logic; decoupling required per layout guidelines. |
| VDDA | Analog supply rail | Provides clean 1.71–3.6 V to analog front-end; must be isolated from noisy digital supplies. |
| SCL/SDA | I²C bidirectional bus | Supports standard/fast-mode I²C host communication; internal pull-ups enabled only when configured as I²C master. |
| MOSI/MISO/SCLK/SSN | SPI interface signals | Full-duplex SPI with configurable polarity/phase; SSN active-low enables multi-device sharing on same bus. |
| INT | Interrupt output | Open-drain signal asserted low when new touch data is ready or error condition occurs. |
| RST | Hardware reset input | Active-low asynchronous reset; requires ≥10 µs pulse width for reliable initialization. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable AFE | Configurable gain, integration time, and sampling rate per channel enable optimization for varying panel thickness and cover lens material. |
| Adaptive Noise Rejection | Real-time suppression of 50/60 Hz EMI, LCD noise, and RF interference without sacrificing scan speed or sensitivity. |
| On-chip Gesture Engine | Dedicated hardware accelerates swipe, tap, hold, and multi-finger gestures with <15 ms latency from touch to host notification. |
| Capacitive Proximity Sensing | Enables wake-on-approach functionality using same sensor electrodes, reducing system-level power consumption by >90% in standby. |
Applications
| Smartphone Display Interface | Automotive Center Stack HMI |
|---|---|
Use Scenario: Integrated into flagship smartphone display modules with curved OLED and thick cover glass. IC Role / Device Role / Timing Role: Primary touch controller managing mutual-capacitance scanning, noise cancellation, and gesture reporting over I²C to AP. Use Value: Enables 10-finger palm rejection and hover detection at 120 Hz report rate while maintaining <200 µA average current draw. | Use Scenario: Mounted behind 8-mm tempered glass in vehicle center console with ambient temperature cycling. IC Role / Device Role / Timing Role: Robust touch acquisition unit with adaptive baseline tracking and glove-mode support across –40°C to +85°C. Use Value: Delivers consistent touch response under condensation, UV exposure, and electromagnetic noise from infotainment power stages. |
| Industrial Panel PC | Medical Diagnostic Tablet |
Use Scenario: Used in factory-floor HMIs exposed to oil mist, vibration, and ESD events. IC Role / Device Role / Timing Role: High-immunity touch controller with programmable debounce, wet-finger tolerance, and fail-safe reporting. Use Value: Maintains operational integrity during 8 kV contact ESD events and provides diagnostic status registers for predictive maintenance logging. | Use Scenario: Embedded in sterile-field tablet used for ultrasound image annotation and patient data entry. IC Role / Device Role / Timing Role: Low-power, high-accuracy touch interface supporting gloved operation and antimicrobial surface coating compatibility. Use Value: Achieves sub-1 mm positional accuracy with 200 Hz polling and meets IEC 60601-1 leakage current limits via isolated power domain design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8CMBR3116 | 16-channel analog front-end, no embedded MCU, requires external host for algorithm execution. | Limited to small-form-factor devices (≤4.3″ displays); lacks on-chip gesture engine and proximity sensing. | Select when cost-sensitive, low-channel-count designs prioritize BOM simplicity over firmware flexibility. |
| MTCH6302-I/SS | 128-channel but uses fixed-function ASIC architecture; firmware not field-upgradable. | No Cortex-M0+ core; gesture logic is hardwired, limiting customization for proprietary UI workflows. | Choose for high-volume consumer products where algorithm stability outweighs need for post-deployment feature updates. |
Compared with CY8CMBR3116 and MTCH6302-I/SS, CYAT81682-128AA88 uniquely combines full-channel scalability, field-upgradable firmware, and hardware-accelerated gesture processing-enabling differentiated HMI features without host CPU overhead.
Availability
CYAT81682-128AA88 is available at Aetrix Electronics and suitable for automotive infotainment systems, medical diagnostic tablets, and industrial panel PCs requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81682-128AA88 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, sensing, and microcontroller solutions for automotive, industrial, and IoT markets.
CYAT81682-128AA88 belongs to the CAPSENSE™ TrueTouch® product line, designed specifically for high-reliability, multi-touch human-machine interfaces demanding robustness against environmental stressors and software-defined feature evolution.
FAQ
What is the maximum supported panel size for CYAT81682-128AA88?
The device supports touch panels up to 15 inches diagonal using mutual-capacitance architecture with 128-channel routing. Maximum size depends on electrode pitch, cover lens thickness, and signal-to-noise ratio-validated reference designs achieve full functionality on 14.1″ 16:9 panels with 0.8 mm glass overlay and 0.3 mm ITO trace pitch.
Does CYAT81682-128AA88 support glove touch operation?
Yes, it supports conductive glove operation down to 15 mm thickness via programmable sensitivity scaling and adaptive baseline tracking. Firmware configuration enables dedicated glove-mode profiles with optimized scan parameters, validated per IEC 61000-4-2 Level 4 ESD immunity during gloved interaction.
Can the embedded Cortex-M0+ be used for customer-specific code beyond touch processing?
Yes, the 128 KB flash and 16 KB SRAM are fully accessible for user applications. Infineon provides ModusToolbox™ SDK with HAL drivers and RTOS examples, enabling implementation of sensor fusion, secure boot, or local UI logic alongside touch firmware-subject to timing constraints of real-time scanning intervals.
Is there hardware support for proximity sensing without additional components?
Yes, the device implements capacitive proximity detection using the same electrode array and integrated AFE. No external components are required-proximity threshold, detection range (up to 40 mm), and wake behavior are configurable via firmware registers and calibrated during manufacturing test.
CYAT81682-128AA88 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)
CYAT81682-128AA88 FAQ
1.How can I place an order for CYAT81682-128AA88 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-128AA88 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 CYAT81682-128AA88 reliable?
The price and inventory of CYAT81682-128AA88 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-128AA88 is usually 5 days.
3.What payment methods are accepted for CYAT81682-128AA88?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-128AA88 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-128AA88?
CYAT81682-128AA88 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-128AA88 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 CYAT81682-128AA88?
For technical support, including CYAT81682-128AA88 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-128AA88 requirements.
6.How does Aetrix verify that CYAT81682-128AA88 is sourced from the original manufacturer or authorized distributors?
All CYAT81682-128AA88 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 CYAT81682-128AA88 meets industry standards.
7.What is the process for return or replacement of CYAT81682-128AA88?
All CYAT81682-128AA88 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-128AA88, 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 CYAT81682-128AA88 part is unused and in its original packaging.
Return procedure for CYAT81682-128AA88:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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