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Infineon Technologies CYAT81682-100AS71
- Part No.:
- CYAT81682-100AS71
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81682-100AS71.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:4,146
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Product details
Overview
CYAT81682-100AS71 from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-pin TQFP package, supporting up to 32 sensing channels, 12-bit SAR ADC resolution, and integrated analog front-end for mutual-capacitance scanning in mobile and industrial HMI applications.
For engineers reviewing the CYAT81682-100AS71 datasheet, CYAT81682-100AS71 pinout, CYAT81682-100AS71 application, or CYAT81682-100AS71 equivalent, key selection criteria include channel count, scan speed (≤15 ms full-frame), I²C/SPI interface support, built-in noise immunity algorithms, and operating voltage range (2.7–5.5 V).
Technical Context
This device integrates a programmable ARM Cortex-M0+ MCU core with dedicated capacitive sensing hardware, enabling real-time touch processing without host CPU intervention. It supports both self- and mutual-capacitance modes, with configurable scan parameters including electrode drive strength, integration time, and baseline tracking rate.
The TrueTouch architecture includes on-chip digital signal processing for palm rejection, hover detection, and multi-finger gesture recognition. Firmware is field-upgradable via I²C or SPI, and the device operates across -40°C to +85°C ambient temperature with ±2 kV HBM ESD rating on all I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Sensing Channels | 32 - supports up to 32 independent X/Y electrodes for high-resolution touch panels |
| ADC Resolution | 12-bit - enables precise capacitance delta measurement down to ~0.1 fF sensitivity |
| Full-Frame Scan Time | ≤15 ms - meets real-time response requirements for smooth UI navigation |
| Supply Voltage Range | 2.7–5.5 V - compatible with single-cell Li-ion, USB-powered, and industrial 3.3/5 V rails |
| Interface Protocols | I²C (up to 1 MHz), SPI (up to 12 MHz) - allows flexible host processor integration |
| Operating Temperature | -40°C to +85°C - qualified for automotive interior and industrial control panel use |
| ESD Rating (HBM) | ±2 kV - protects against common handling and system-level electrostatic discharge events |
Pinout & Package
100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply Rail | Provides power to digital I/O buffers; must be decoupled with 100 nF ceramic capacitor |
| VDDA | Analog Supply Rail | Supplies analog front-end and ADC; requires separate low-noise LDO or ferrite-bead filtering |
| SCL / SDA | I²C Interface Pins | Open-drain bidirectional signals; require 2.2–10 kΩ pull-up resistors to VDDIO |
| MOSI / MISO / SCLK / SS | SPI Interface Pins | Support master/slave operation; SS active-low enables hardware chip select |
| INT | Interrupt Output | Active-low open-drain signal indicating new touch data ready or error condition |
| RESET | Hardware Reset Input | Active-low asynchronous reset; minimum pulse width 100 ns |
| TX[0:31] | Transmit Electrodes | Driven by on-chip drivers during mutual-capacitance scan; configurable as GPIO in non-touch mode |
| RX[0:31] | Receive Electrodes | Connected to SAR ADC input via programmable gain amplifier; support differential sampling |
Key Features
| Feature | Design Value |
|---|---|
| Programmable ARM Cortex-M0+ | Enables custom firmware execution for proprietary gesture logic and sensor fusion without external MCU |
| TrueTouch Noise Immunity Engine | Suppresses >60 Vpp conducted noise and >10 Vpp radiated noise at 100 kHz–10 MHz without external shielding |
| Configurable Baseline Tracking | Adapts to slow environmental drift (e.g., temperature/humidity) while preserving fast touch response |
| Integrated Analog Front-End | Eliminates need for external op-amps, filters, or ADCs-reducing BOM count and PCB area by ≥30% |
| Firmware Over-the-Air (OTA) Ready | Supports secure firmware update via I²C/SPI using CRC-32 checksum and dual-bank flash memory |
Applications
| Smartphone Touchscreen Controller | Industrial HMI Panel |
|---|---|
Use Scenario: Capacitive touch overlay on 5.5-inch AMOLED display with glove and wet-finger operation. IC Role / Device Role / Timing Role: Primary touch controller managing mutual-capacitance scan, gesture decoding, and host communication. Use Value: Achieves <10 ms report latency and rejects >20 Vpp noise from adjacent RF modules and display drivers. | Use Scenario: 10-inch resistive-to-capacitive upgrade in factory automation terminal with metal bezel and EMI-heavy environment. IC Role / Device Role / Timing Role: Standalone touch processor interfacing to ARM-based PLC controller over I²C at 400 kHz. Use Value: Maintains stable tracking under 12 VAC motor drive interference and supports IP65-rated sealed front panel design. |
| Automotive Center Stack Display | Medical Patient Monitor Interface |
Use Scenario: 8-inch infotainment display in vehicle cabin with wide temperature swing (-30°C to +85°C) and high-vibration conditions. IC Role / Device Role / Timing Role: AEC-Q200 qualified touch controller with integrated diagnostics and fault reporting via I²C. Use Value: Passes ISO 11452-4 bulk current injection testing and provides real-time touch integrity monitoring per ASIL-B requirements. | Use Scenario: Critical-care monitor with sterile-glove operation, alcohol wipe resistance, and zero false-trigger requirement. IC Role / Device Role / Timing Role: Dedicated touch subsystem with configurable debounce, proximity wake-up, and low-power idle mode. Use Value: Delivers <0.1% false touch rate over 5-year service life and supports 10 µA sleep current for battery-backed operation. |
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), no integrated TrueTouch engine, requires external firmware tuning | Suitable only for small-form-factor panels (<4.3") with minimal noise exposure | Select when cost sensitivity outweighs noise immunity and scan speed requirements |
| MTCH6302-I/SS | Fixed-function ASIC (no MCU), 28-channel max, no OTA capability, lower ESD rating (±1 kV) | Limited to consumer-grade portable devices without industrial or automotive qualification needs | Choose for high-volume, fixed-feature designs where firmware flexibility is unnecessary |
Compared with CY8C4014LQI-422 and MTCH6302-I/SS, CYAT81682-100AS71 delivers higher channel density, certified noise robustness, and field-upgradable firmware-making it optimal for demanding HMI applications requiring long-term maintainability and environmental resilience.
Availability
CYAT81682-100AS71 is available at Aetrix Electronics and suitable for smartphone touch interfaces, industrial HMI panels, automotive center stack displays, and medical patient monitor interfaces requiring stable component supply and long lifecycle support.
Supply support for CYAT81682-100AS71 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 manufacturing.
CYAT81682-100AS71 belongs to the TrueTouch Gen5 product line, designed specifically for high-reliability, noise-immune capacitive touch systems in automotive, industrial, and medical equipment.
FAQ
What is the maximum supported touch panel size for CYAT81682-100AS71?
The device supports up to 12-inch diagonal panels with standard ITO trace routing and 500 Ω/sq sheet resistance. Panel size is constrained by total electrode count (max 32), not physical dimensions-larger panels require multiplexed electrode architectures or segmented scanning, both supported via firmware configuration.
Does CYAT81682-100AS71 support glove touch operation?
Yes-it includes programmable sensitivity scaling and adaptive thresholding that maintains reliable detection with 1.5 mm thick leather or synthetic gloves. Factory calibration routines optimize SNR for specific glove materials, and firmware updates can refine performance post-deployment.
Is an external crystal required for CYAT81682-100AS71 operation?
No-internal precision RC oscillator (±2% accuracy) suffices for touch timing. An external 24 MHz crystal is optional and improves I²C/SPI timing margin and reduces jitter in high-noise environments, but is not mandatory for basic functionality.
Can CYAT81682-100AS71 operate in standalone mode without host processor intervention?
Yes-the integrated Cortex-M0+ executes preloaded firmware to manage scanning, filtering, gesture recognition, and reporting. Host interaction is optional for configuration updates or advanced command-mode operations; default behavior runs autonomously after power-on initialization.
CYAT81682-100AS71 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)
CYAT81682-100AS71 FAQ
1.How can I place an order for CYAT81682-100AS71 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-100AS71 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 CYAT81682-100AS71 reliable?
The price and inventory of CYAT81682-100AS71 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-100AS71 is usually 5 days.
3.What payment methods are accepted for CYAT81682-100AS71?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-100AS71 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-100AS71?
CYAT81682-100AS71 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-100AS71 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 CYAT81682-100AS71?
For technical support, including CYAT81682-100AS71 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-100AS71 requirements.
6.How does Aetrix verify that CYAT81682-100AS71 is sourced from the original manufacturer or authorized distributors?
All CYAT81682-100AS71 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 CYAT81682-100AS71 meets industry standards.
7.What is the process for return or replacement of CYAT81682-100AS71?
All CYAT81682-100AS71 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-100AS71, 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 CYAT81682-100AS71 part is unused and in its original packaging.
Return procedure for CYAT81682-100AS71:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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