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Infineon Technologies CYAT81688-100AS77KHT
- Part No.:
- CYAT81688-100AS77KHT
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AS77KHT.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,691
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Product details
Overview
CYAT81688-100AS77KHT from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-channel analog front-end, integrated ARM Cortex-M0+ processor, and support for up to 10-finger simultaneous tracking in mobile and industrial HMI applications.
For engineers reviewing the CYAT81688-100AS77KHT datasheet, CYAT81688-100AS77KHT pinout, CYAT81688-100AS77KHT application, or CYAT81688-100AS77KHT equivalent, key selection criteria include mutual-capacitance scan resolution, integrated firmware execution capability, I²C/SPI host interface compatibility, and ESD robustness per IEC 61000-4-2 Level 4.
Technical Context
This device integrates a programmable analog signal chain with configurable sensor matrix scanning logic and on-chip firmware execution to enable adaptive touch sensing in noisy environments. It supports both self- and mutual-capacitance measurement modes with 16-bit ADC resolution and real-time baseline compensation.
The TrueTouch architecture includes dedicated hardware accelerators for gesture recognition (swipe, zoom, rotate), noise filtering via spread-spectrum modulation, and automatic recalibration triggered by temperature drift or moisture events - all without host CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Touch Channels | 100 analog input channels support up to 20×20 mutual-capacitance sensor grids |
| Processor Core | ARM Cortex-M0+ @ 48 MHz enables local firmware execution for gesture processing |
| ESD Rating | ±15 kV air, ±8 kV contact per IEC 61000-4-2 Level 4 ensures robust front-panel operation |
| Scan Rate | Up to 120 Hz full-frame refresh rate maintains responsive UI under fast finger motion |
| Interface | I²C (up to 1 MHz) and SPI (up to 12 MHz) provide flexible host connectivity options |
| Operating Voltage | 1.71–1.89 V core supply enables low-power battery-operated designs |
Pinout & Package
Package: 100-pin QFN (7 mm × 7 mm, 0.4 mm pitch) with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O power supply | Supplies 1.71–3.6 V to GPIOs and interface pins; decoupling required |
| VDDA | Analog power supply | Provides clean 1.71–1.89 V for sensor AFE; separate LDO recommended |
| SCL/SDA | I²C bidirectional bus | Open-drain pins requiring external pull-up resistors to VDDIO |
| MOSI/MISO/SCLK/SS | SPI interface signals | Support master/slave mode; SS active-low chip select with internal pull-down |
| INT | Interrupt output | Active-low open-drain signal indicating touch event or firmware status change |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Sensor Architecture | Configurable channel mapping allows reuse across different overlay sizes and electrode layouts |
| Integrated Gesture Engine | Dedicated hardware block processes swipe, pinch, rotate, and tap gestures without host CPU load |
| Wet-Finger Rejection | Adaptive thresholding and multi-frequency scanning maintain accuracy with water-covered surfaces |
| Auto-Tuning Calibration | On-the-fly baseline and noise floor adjustment eliminates manual calibration during production |
Applications
| Smartphone Display Interface | Industrial Control Panel |
|---|---|
Use Scenario: Capacitive touch overlay on 6.5-inch OLED display with curved edge bezel. IC Role / Device Role / Timing Role: Primary touch controller managing mutual-capacitance scanning, gesture decoding, and I²C reporting to AP. Use Value: 10-finger tracking and wet-finger rejection ensure reliable UI interaction in consumer handheld use cases. | Use Scenario: 10.1-inch resistive-to-capacitive retrofit panel in factory HMIs exposed to oil mist and vibration. IC Role / Device Role / Timing Role: Standalone touch processor handling noise-immune scanning and local gesture interpretation. Use Value: ±15 kV ESD rating and spread-spectrum modulation maintain uptime in electrically noisy industrial zones. |
| Medical Tablet Touch System | Automotive Center Stack Display |
Use Scenario: Disinfectant-resistant touchscreen on portable diagnostic tablet used in clinical settings. IC Role / Device Role / Timing Role: Touch controller with auto-calibration and moisture compensation running certified medical firmware. Use Value: Real-time baseline correction prevents false triggers during repeated alcohol wipe cleaning cycles. | Use Scenario: Driver-facing infotainment display operating across –40°C to +105°C ambient range. IC Role / Device Role / Timing Role: Automotive-qualified touch controller with AEC-Q100 Grade 2 compliance and thermal drift compensation. Use Value: On-chip temperature sensor and adaptive recalibration maintain touch accuracy over full automotive thermal profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8CTMA100-100AXI | Same PSoC TrueTouch platform but lacks integrated Cortex-M0+; relies on external host for gesture processing | Requires host-side firmware development for advanced gestures; lower BOM cost but higher system integration effort | Select when gesture complexity is low and host resources are available for real-time processing |
| MT41001A-100QF | Competing 100-channel controller with 8-bit RISC core; no ARM architecture or IEC 61000-4-2 Level 4 ESD rating | Limited to commercial temperature range (0°C to +70°C); unsuitable for automotive or medical deployments | Select only for cost-sensitive consumer electronics where extended temperature and ESD performance are not required |
Compared with CY8CTMA100-100AXI and MT41001A-100QF, CYAT81688-100AS77KHT delivers autonomous gesture execution, certified ESD resilience, and extended temperature operation - making it uniquely suitable for safety-critical and harsh-environment HMI systems.
Availability
CYAT81688-100AS77KHT is available at Aetrix Electronics and suitable for smartphone display interface, industrial control panel, and medical tablet touch system applications requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81688-100AS77KHT 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 human-machine interface solutions.
CYAT81688-100AS77KHT belongs to the TrueTouch Gen6 product line, designed specifically for high-reliability capacitive touch applications demanding integrated processing, noise immunity, and automotive/industrial qualification.
FAQ
What is the maximum supported sensor matrix size for CYAT81688-100AS77KHT?
The device supports up to 100 analog input channels, enabling configuration for sensor matrices such as 20×20 mutual-capacitance grids or 100×1 self-capacitance layouts. Channel assignment is fully programmable via firmware, allowing optimization for specific overlay geometry and resolution requirements without hardware changes.
Does CYAT81688-100AS77KHT require external memory for firmware storage?
No. The device integrates 256 KB of on-chip flash memory and 64 KB of SRAM, sufficient to store boot code, touch algorithm firmware, and calibration data. Firmware updates are performed via I²C or SPI using Infineon's standard bootloader protocol without external memory components.
Is CYAT81688-100AS77KHT qualified for automotive applications?
Yes. It meets AEC-Q100 Grade 2 specifications (–40°C to +105°C) and includes built-in diagnostics such as sensor line short/open detection, power rail monitoring, and CRC-protected firmware execution - fulfilling functional safety requirements for center stack and instrument cluster touch systems.
How does the wet-finger rejection feature operate in practice?
It combines multi-frequency scanning (100 kHz–500 kHz) with adaptive threshold adjustment and differential signal analysis to distinguish between conductive water films and intentional finger contact. Validation testing shows consistent 5-mm water droplet rejection while maintaining 99.5% touch detection accuracy under ISO 10605-compliant conditions.
CYAT81688-100AS77KHT 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)
CYAT81688-100AS77KHT FAQ
1.How can I place an order for CYAT81688-100AS77KHT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AS77KHT 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 CYAT81688-100AS77KHT reliable?
The price and inventory of CYAT81688-100AS77KHT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AS77KHT is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AS77KHT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AS77KHT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AS77KHT?
CYAT81688-100AS77KHT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AS77KHT 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 CYAT81688-100AS77KHT?
For technical support, including CYAT81688-100AS77KHT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AS77KHT requirements.
6.How does Aetrix verify that CYAT81688-100AS77KHT is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AS77KHT 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 CYAT81688-100AS77KHT meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AS77KHT?
All CYAT81688-100AS77KHT units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AS77KHT, 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 CYAT81688-100AS77KHT part is unused and in its original packaging.
Return procedure for CYAT81688-100AS77KHT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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