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Infineon Technologies CYAT81682-100AS77Z
- Part No.:
- CYAT81682-100AS77Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81682-100AS77Z.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:3,720
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Product details
Overview
CYAT81682-100AS77Z 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 I²C/SPI/UART interfaces. It operates from 2.7–5.5 V, delivers <15 µA deep-sleep current, and is deployed in industrial HMI panels requiring robust noise immunity and glove-touch capability.
For engineers reviewing the CYAT81682-100AS77Z datasheet, CYAT81682-100AS77Z pinout, CYAT81682-100AS77Z application, or CYAT81682-100AS77Z equivalent, key selection criteria include channel count, mutual-capacitance scan architecture, integrated analog front-end gain calibration, and firmware-upgradable touch algorithm stack for dynamic environmental compensation.
Technical Context
This device implements a mixed-signal programmable system-on-chip architecture combining ARM Cortex-M0+ CPU core with dedicated capacitive sensing hardware (CSA), configurable analog blocks (OpAmps, Comparators, IDACs), and digital peripherals (TCPWM, SCB). It supports both self- and mutual-capacitance scanning modes with real-time baseline tracking and adaptive thresholding.
The TrueTouch engine executes proprietary firmware that performs raw data filtering, centroid calculation, gesture recognition (tap, swipe, pinch), and noise rejection via spread-spectrum modulation and correlated double sampling-enabling operation under >20 Vpp AC noise environments without external shielding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Sensing Channels | 32 - supports full-size 10.1" diagonal projected-capacitive touch panels with multi-finger tracking |
| ADC Resolution | 12-bit SAR - enables high dynamic range signal capture for low-signal-to-noise ratio (SNR) finger detection |
| Supply Voltage Range | 2.7–5.5 V - allows direct integration with 3.3 V or 5 V system rails without LDO overhead |
| Deep-Sleep Current | <15 µA - extends battery life in portable HMIs with periodic wake-on-touch events |
| Interface Protocols | I²C (up to 1 MHz), SPI (up to 12 MHz), UART - provides flexible host processor coupling and debug access |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control panel deployment |
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 Rail | Supplies 1.8–5.5 V to all GPIOs and interface logic; independent of core VDDD |
| VDDD | Digital Core Supply | Provides regulated 1.2 V to CPU and digital subsystem; requires external decoupling |
| SDA / SCL | I²C Bidirectional Data/Clock | Open-drain pins with internal pull-ups; support standard/fast-mode I²C up to 1 MHz |
| MOSI / MISO / SCLK / SS | SPI Interface Signals | Full-duplex master/slave SPI with programmable polarity/phase and DMA support |
| TX / RX | UART Transmitter/Receiver | Asynchronous serial interface with programmable baud rate generator and FIFO buffering |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Front-End | Configurable IDAC current sources (0.1–100 µA), CSA gain stages (1–32×), and reference voltage selection enable sensor-specific SNR optimization |
| Firmware-Upgradeable Touch Engine | Field-updatable TrueTouch algorithm stack via I²C/SPI allows post-deployment tuning for new overlay materials or EMI conditions |
| Glove & Wet-Finger Support | Dual-scan mode (self + mutual) with adaptive thresholding maintains >95% detection rate with 2 mm latex gloves and 0.5 mm water film |
| Integrated System-Level ESD Protection | ±15 kV HBM on all I/O pins eliminates need for external TVS diodes in Class A industrial enclosures |
Applications
| Industrial HMI Panels | Medical Device Touchscreens |
|---|---|
Use Scenario: Operator interface on PLC-controlled packaging machinery exposed to 50/60 Hz EMI and conductive dust. IC Role / Device Role / Timing Role: Capacitive touch controller managing 24-button + slider overlay with real-time noise cancellation. Use Value: Maintains stable touch response without recalibration across temperature shifts from 15°C to 70°C ambient. | Use Scenario: Sterilizable tablet-style monitor in ICU infusion pumps requiring glove operation and liquid spill tolerance. IC Role / Device Role / Timing Role: Primary touch acquisition and gesture processing unit with fail-safe timeout and CRC-protected firmware updates. Use Value: Achieves <100 ms touch-to-host-report latency while meeting IEC 60601-1 leakage current limits. |
| Automotive Infotainment Displays | Smart Home Control Panels |
Use Scenario: Center-stack display in EV dashboard operating under wide thermal cycling (−40°C to +85°C) and RF interference from cellular modems. IC Role / Device Role / Timing Role: Dedicated touch controller interfacing via I²C to main SoC, handling multi-finger gestures and proximity wake-up. Use Value: Delivers consistent 5-finger tracking accuracy despite 10 V/m 900 MHz radiated emissions per ISO 11452-2. | Use Scenario: Wall-mounted climate control panel with tempered glass overlay and ambient light variation from 10–10,000 lux. IC Role / Device Role / Timing Role: Self-contained touch manager performing auto-baseline adjustment and ambient capacitance compensation. Use Value: Eliminates false triggers during rapid illumination changes using dual-threshold adaptive filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4014LQI-422 | Lower channel count (16), no integrated TrueTouch firmware; requires external host-based algorithm implementation | Suitable for cost-sensitive single-button or slider-only designs, not full multi-touch panels | Select when BOM cost priority outweighs development time and advanced gesture support |
| MTCH6302-I/SS | Dedicated touch controller (no MCU core), fixed firmware, 28-channel max, no SPI/UART interface | Targeted at consumer appliances with simple tap/swipe UI and minimal host interaction | Choose for plug-and-play integration where firmware customization is unnecessary |
Compared with CY8C4014LQI-422 and MTCH6302-I/SS, CYAT81682-100AS77Z uniquely combines field-upgradable touch algorithms, full peripheral flexibility, and industrial-grade noise resilience-making it optimal for mission-critical HMIs where firmware adaptability and environmental robustness are non-negotiable.
Availability
CYAT81682-100AS77Z is available at Aetrix Electronics and suitable for industrial HMI panels, medical device interfaces, and automotive infotainment displays requiring stable component supply and long-term lifecycle assurance.
Supply support for CYAT81682-100AS77Z 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 secure connectivity solutions, with global R&D centers and ISO/TS 16949-certified manufacturing.
CYAT81682-100AS77Z belongs to the TrueTouch Gen5 product line, engineered specifically for high-reliability human-machine interfaces in harsh electromagnetic and thermal environments.
FAQ
What is the maximum number of simultaneous touch points supported by CYAT81682-100AS77Z?
The CYAT81682-100AS77Z supports up to 10 simultaneous touch points with full centroid reporting and gesture recognition. This capability is enabled by its 32-channel analog front-end and dedicated TrueTouch firmware executing on the integrated ARM Cortex-M0+ core, allowing precise multi-finger tracking even on large-format overlays.
Does CYAT81682-100AS77Z require an external crystal oscillator?
No. CYAT81682-100AS77Z integrates a factory-trimmed 24 MHz internal IMO (Internal Main Oscillator) with ±2% accuracy over temperature and voltage, sufficient for all touch timing requirements. An external crystal is optional only if higher clock precision is needed for synchronous host communication or timestamping.
Can the TrueTouch firmware be customized for specific overlay thicknesses or dielectric materials?
Yes. Infineon provides the TrueTouch Tuning Suite (TTTS) software tool, which allows engineers to adjust sensor configuration parameters-including drive strength, integration time, and noise filter coefficients-and generate custom firmware images validated for specific overlay stack-ups (e.g., 3 mm Gorilla Glass + 0.5 mm adhesive).
What is the recommended PCB layout practice for minimizing noise coupling into the analog sensing pins?
Route analog sensor traces (X/Y lines) as differential pairs with 50 Ω characteristic impedance, maintain ≥2 mm clearance from digital traces and switching power supplies, place dedicated ground vias every 5 mm along sensor trace length, and isolate the analog ground plane with a split beneath the IC's VSSA pins-verified in Infineon's CYAT81682 layout guidelines document AN92239.
CYAT81682-100AS77Z 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)
CYAT81682-100AS77Z FAQ
1.How can I place an order for CYAT81682-100AS77Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-100AS77Z 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 CYAT81682-100AS77Z reliable?
The price and inventory of CYAT81682-100AS77Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-100AS77Z is usually 5 days.
3.What payment methods are accepted for CYAT81682-100AS77Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-100AS77Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-100AS77Z?
CYAT81682-100AS77Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-100AS77Z 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 CYAT81682-100AS77Z?
For technical support, including CYAT81682-100AS77Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-100AS77Z requirements.
6.How does Aetrix verify that CYAT81682-100AS77Z is sourced from the original manufacturer or authorized distributors?
All CYAT81682-100AS77Z 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 CYAT81682-100AS77Z meets industry standards.
7.What is the process for return or replacement of CYAT81682-100AS77Z?
All CYAT81682-100AS77Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-100AS77Z, 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 CYAT81682-100AS77Z part is unused and in its original packaging.
Return procedure for CYAT81682-100AS77Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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