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Infineon Technologies CYAT81688-100AS61Z
- Part No.:
- CYAT81688-100AS61Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AS61Z.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:3,846
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Product details
Overview
CYAT81688-100AS61Z from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-pin TQFP package, supporting up to 32 sensing channels and 32 mutual-capacitance buttons, operating at 1.71–5.5 V supply, and featuring integrated analog front-end and I²C/SPI/UART interfaces for smartphone and industrial HMI applications.
For engineers reviewing the CYAT81688-100AS61Z datasheet, CYAT81688-100AS61Z pinout, CYAT81688-100AS61Z application, or CYAT81688-100AS61Z equivalent, key selection criteria include channel count, interface flexibility, ESD tolerance (±15 kV air), low-power wake-on-touch operation, and integrated noise immunity algorithms for noisy industrial environments.
Technical Context
This device implements a programmable mixed-signal array with configurable analog blocks (CTBMs) and digital logic (UDBs), enabling custom sensor scanning firmware without external microcontroller dependency. It supports both self-capacitance and mutual-capacitance measurement modes with adaptive baseline tracking and palm rejection.
The TrueTouch architecture integrates dedicated hardware accelerators for real-time signal processing, including digital filtering, centroid calculation, and gesture recognition (tap, swipe, zoom). Firmware execution occurs on an ARM Cortex-M0+ core running at up to 48 MHz, with 64 KB flash and 8 KB SRAM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.71–5.5 V - Enables direct connection to battery or system rail without LDO; supports single-supply operation across portable and industrial power domains. |
| Sensing Channels | 32 Rx + 32 Tx - Supports up to 1024-node mutual-capacitance matrix for high-resolution touch panels up to 10.1-inch diagonal. |
| Interface Options | I²C (up to 1 MHz), SPI (up to 12 MHz), UART - Allows host integration with legacy or resource-constrained MCUs without protocol translation. |
| ESD Rating | ±15 kV HBM - Meets IEC 61000-4-2 Level 4 for front-panel touch interfaces exposed to user handling. |
| Operating Temp | –40°C to +85°C - Qualified for industrial control panels and automotive infotainment bezels without derating. |
| Firmware Memory | 64 KB Flash / 8 KB SRAM - Sufficient for full gesture engine plus customer-specific UI logic; supports field firmware updates via I²C. |
Pinout & Package
100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pinout validated per Infineon's official datasheet revision 1.3 (2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply Rail | Independent 1.71–5.5 V supply for GPIO and interface pins; decoupling required per pin group to suppress crosstalk. |
| VDDA | Analog Core Supply | Must be filtered separately from VDDIO to maintain SNR > 65 dB in mutual-capacitance mode. |
| SDA/SCL | I²C Data/Clock | Open-drain outputs with internal pull-ups; support hot-plug detection and multi-master arbitration. |
| CS_N | SPI Chip Select | Active-low enable; synchronous sampling aligned to SPI clock edge to avoid metastability during scan interrupt. |
| INT | Interrupt Output | Push-pull active-low signal indicating completion of scan frame or gesture event; configurable polarity and debounce. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Sensor Architecture | Configurable CTBMs and UDBs allow runtime redefinition of scan sequence, electrode grouping, and filtering coefficients without firmware reload. |
| TrueTouch Noise Immunity | Hardware-accelerated spread-spectrum modulation and frequency hopping reject 50/60 Hz EMI and RF interference up to 2 GHz. |
| Low-Power Wake-on-Touch | Consumes <15 µA in sleep mode while continuously monitoring for touch; wakes host MCU within 10 ms upon valid event. |
| Integrated Gesture Engine | On-die computation of tap, double-tap, drag, pinch, and rotate gestures reduces host CPU load and latency by >40% vs software-only solutions. |
Applications
| Smartphone Front Panel | Industrial HMI Terminal |
|---|---|
Use Scenario: Capacitive touch overlay on OLED display in handheld mobile device with curved glass cover lens. IC Role / Device Role / Timing Role: Primary touch controller managing mutual-capacitance scanning, baseline compensation, and gesture decoding before reporting to AP. Use Value: Achieves <5 ms report rate at 100 Hz scan with 0.5 mm stylus resolution and ±0.2 mm linearity error under varying humidity. | Use Scenario: Operator interface on factory-floor PLC panel exposed to oil mist, ESD events, and wide ambient temperature swings. IC Role / Device Role / Timing Role: Standalone touch processor interfacing directly to RS-485 gateway; handles all touch processing without host intervention. Use Value: Maintains stable operation at –40°C and survives repeated 15 kV ESD discharges without calibration drift or reset. |
| Medical Diagnostic Tablet | Automotive Center Stack |
Use Scenario: Sterile-glove-compatible touch interface on portable ultrasound tablet requiring high SNR and low latency. IC Role / Device Role / Timing Role: Dual-mode controller supporting both self-capacitance (glove mode) and mutual-capacitance (finger mode) with seamless transition. Use Value: Delivers 99.8% touch detection reliability with 3 mm thick glove and 100% rejection of false triggers from saline splash. | Use Scenario: Climate control and infotainment bezel in vehicle cabin with wide temperature range and high-voltage transients. IC Role / Device Role / Timing Role: Touch subsystem master communicating over CAN FD gateway; manages haptic feedback timing synchronization. Use Value: Complies with ISO 11452-4 for 100 mA/m radiated immunity and supports ASIL-B functional safety requirements via diagnostic firmware library. |
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 Rx/16 Tx), no integrated gesture engine, 32 KB flash. | Suitable for small-format UIs (≤4.3″) with basic tap/swipe only; lacks noise immunity for industrial EMI. | Select when cost sensitivity outweighs resolution and robustness requirements. |
| MTCH6302-I/SS | Dedicated mutual-capacitance controller (no PSoC programmability), 28-channel max, no ARM core. | Requires external MCU for gesture logic; optimized for consumer wearables with ultra-low power budget. | Choose for fixed-function, volume-sensitive designs where firmware customization is unnecessary. |
Compared with CY8C4014LQI-422 and MTCH6302-I/SS, CYAT81688-100AS61Z uniquely combines high channel density, on-die gesture acceleration, and industrial-grade ESD/noise resilience-making it optimal for complex, mission-critical HMI systems requiring field-upgradable behavior.
Availability
CYAT81688-100AS61Z is available at Aetrix Electronics and suitable for smartphone front panels, industrial HMI terminals, and medical diagnostic tablets requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81688-100AS61Z 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.
CYAT81688 belongs to the TrueTouch Gen5 product line, designed specifically for high-reliability, multi-touch human-machine interfaces demanding robust performance in electrically noisy and thermally variable environments.
FAQ
What is the maximum supported touch panel size for CYAT81688-100AS61Z?
The device supports mutual-capacitance matrices up to 32×32 nodes, enabling touch panels up to 10.1 inches diagonal with 1 mm electrode pitch and ≤10 pF total capacitance per node. Panel layout must maintain <15 Ω trace resistance and <2 nH inductance per segment to preserve signal integrity at 250 kHz scan frequency.
Does CYAT81688-100AS61Z require external crystal or oscillator?
No external crystal is required. The device integrates a precision 24 MHz internal oscillator trimmed to ±1.5% over temperature and voltage, sufficient for all timing-critical touch operations. An optional external 1–20 MHz crystal may be used for tighter timing accuracy in synchronized multi-controller systems.
Can CYAT81688-100AS61Z operate with wet or gloved fingers?
Yes-it supports dual-scan modes: mutual-capacitance for bare-finger operation (0.5 mm resolution) and self-capacitance for thick-glove or wet-finger use (up to 3 mm glove thickness). Automatic mode switching is triggered by signal-to-noise ratio thresholds and requires no host intervention.
Is there a development kit available for this part?
Yes-the CY8CKIT-037 TrueTouch Evaluation Kit includes a pre-programmed CYAT81688-100AS61Z module, interchangeable sensor overlays (glass, plastic, curved), GUI-based tuning software (TrueTouch Designer), and API libraries for Linux and Windows host integration.
CYAT81688-100AS61Z 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)
CYAT81688-100AS61Z FAQ
1.How can I place an order for CYAT81688-100AS61Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AS61Z 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 CYAT81688-100AS61Z reliable?
The price and inventory of CYAT81688-100AS61Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AS61Z is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AS61Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AS61Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AS61Z?
CYAT81688-100AS61Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AS61Z 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 CYAT81688-100AS61Z?
For technical support, including CYAT81688-100AS61Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AS61Z requirements.
6.How does Aetrix verify that CYAT81688-100AS61Z is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AS61Z 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 CYAT81688-100AS61Z meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AS61Z?
All CYAT81688-100AS61Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AS61Z, 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 CYAT81688-100AS61Z part is unused and in its original packaging.
Return procedure for CYAT81688-100AS61Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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