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Infineon Technologies CYAT81688-100AS77
- Part No.:
- CYAT81688-100AS77
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AS77.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:900
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Product details
Overview
CYAT81688-100AS77 from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-pin TQFP package, supporting up to 32 sensing channels, 10-bit resolution, and integrated analog front-end for mutual-capacitance touch sensing in industrial HMI panels.
For engineers reviewing the CYAT81688-100AS77 datasheet, CYAT81688-100AS77 pinout, CYAT81688-100AS77 application, or CYAT81688-100AS77 equivalent, key selection criteria include channel count, I²C/SPI interface support, noise immunity in EMI-prone environments, and firmware-upgradable touch algorithm stack.
Technical Context
This device integrates a programmable analog signal chain with a 32-bit ARM Cortex-M0+ MCU core, enabling real-time touch processing without host CPU intervention. It supports both self- and mutual-capacitance measurement modes, with configurable scan timing and dynamic baseline tracking.
The TrueTouch architecture includes on-chip charge-transfer ADCs, programmable gain amplifiers, and digital filtering blocks-allowing adaptive tuning for varying panel thicknesses (up to 8 mm glass) and environmental drift compensation across -40°C to +85°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensing Channels | 32 independent capacitive sense inputs for multi-touch gesture detection on large-format panels |
| Resolution | 10-bit effective resolution enables sub-millimeter touch localization accuracy |
| Interface | I²C (up to 1 MHz) and SPI (up to 12 MHz) for low-latency host communication |
| Operating Temp | -40°C to +85°C ambient rating ensures reliability in industrial control enclosures |
| Supply Voltage | 1.71 V to 5.5 V single-supply operation simplifies power rail design |
| Firmware Upgrade | In-field firmware update via I²C/SPI supports algorithm enhancements without hardware change |
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 input | Supplies voltage for all digital I/O pins; must be decoupled locally |
| VDDA | Analog supply input | Provides clean power to internal ADC and analog front-end; separate LDO recommended |
| SDA/SCL | I²C bidirectional data/clock | Open-drain pins requiring external pull-ups; compatible with 1.8 V/3.3 V systems |
| MOSI/MISO/SCLK/SSN | SPI interface signals | Supports full-duplex SPI at up to 12 MHz; SSN active-low chip select |
| INT | Interrupt output | Active-low open-drain signal indicating touch event or firmware status change |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Front-End | Configurable CSD (CapSense Delta) and CSX (CapSense eXtended) sensor drive modes per channel |
| On-Chip ARM Cortex-M0+ | Enables real-time touch processing, gesture recognition, and host offload without external MCU |
| Dynamic Noise Filtering | Adaptive frequency hopping and spread-spectrum modulation suppress 50/60 Hz and RF interference |
| Water-Tolerant Sensing | Detects intentional touch through up to 5 mm water layer using differential scanning algorithms |
Applications
| Industrial HMI Panels | Medical Device Touchscreens |
|---|---|
Use Scenario: Operator interface on PLC-controlled machinery with metal enclosure and high EMI exposure. IC Role / Device Role / Timing Role: Primary touch controller handling multi-finger gestures and proximity wake-up with <15 ms report latency. Use Value: Immunity to conducted noise from nearby VFDs enables stable operation without shielding or recalibration. | Use Scenario: Sterilizable touchscreen on infusion pump with glove and wet-finger operation. IC Role / Device Role / Timing Role: Capacitive sensing engine with water rejection and palm rejection logic. Use Value: Maintains touch accuracy under saline splash and latex-glove conditions per IEC 60601-1 requirements. |
| Automotive Center Displays | Smart Home Control Panels |
Use Scenario: In-vehicle infotainment display exposed to wide temperature swings and condensation. IC Role / Device Role / Timing Role: Touch acquisition and preprocessing unit with auto-baseline adjustment across -40°C to +85°C. Use Value: Eliminates manual calibration during vehicle cold-soak or hot-soak testing cycles. | Use Scenario: Wall-mounted thermostat with glass overlay and ambient light variation. IC Role / Device Role / Timing Role: Low-power touch coordinator managing wake-on-touch and sleep-mode current <10 µA. Use Value: Extends battery life in wireless installations while maintaining responsive UI feedback. |
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 | 8-channel CapSense-only device; no ARM core; requires external host MCU for gesture processing | Limited to small-form-factor interfaces; lacks water tolerance and dynamic noise filtering | Select when cost-sensitive, low-channel-count designs prioritize BOM simplicity over autonomous processing |
| MTCH6302-I/ST | 16-channel standalone touch controller; fixed firmware; no field-upgradable algorithm stack | No support for custom gesture definitions or analog front-end reconfiguration | Choose for high-volume consumer appliances where touch behavior is static and firmware updates are unnecessary |
Compared with CY8C4014LQI-422 and MTCH6302-I/ST, CYAT81688-100AS77 delivers autonomous multi-touch processing, field-upgradable algorithms, and robust operation in harsh environments-justifying its use in mission-critical industrial and medical HMI where flexibility and reliability are non-negotiable.
Availability
CYAT81688-100AS77 is available at Aetrix Electronics and suitable for industrial HMI panels, medical device touchscreens, and automotive center displays requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81688-100AS77 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 industrial, automotive, and IoT applications.
CYAT81688-100AS77 belongs to the TrueTouch Gen5 product line, designed specifically for high-reliability capacitive touch interfaces in safety-critical and EMI-intensive environments.
FAQ
What is the maximum supported panel size for CYAT81688-100AS77?
The device supports up to 15-inch diagonal touch panels with standard ITO patterns when using mutual-capacitance mode. Panel size is constrained by total capacitance load per channel (<30 pF) and achievable SNR at scan rates above 60 Hz. Layout guidelines specify trace length limits and ground plane isolation to maintain signal integrity.
Does CYAT81688-100AS77 support glove touch?
Yes-it supports operation with standard cotton, leather, and surgical gloves via adjustable sensitivity thresholds and enhanced signal-to-noise ratio in CSX mode. Glove performance is validated per IEC 61000-4-2 Level 4 (8 kV contact discharge) and requires proper electrode pitch and overlay thickness configuration.
Can the firmware be updated in-system?
Yes-firmware updates are performed over I²C or SPI using Infineon's PSoC Programmer tool and signed .cyacd2 image files. Updates preserve calibration data and user-defined parameters, and require no external programming hardware after initial board bring-up.
Is there an evaluation kit available for this part?
Yes-the CY8CKIT-028-TTJB TrueTouch Evaluation Kit provides hardware, GUI software, and firmware examples for rapid prototyping. It includes a 7-inch demo panel, USB bridge, and preloaded tuning scripts for water rejection, palm rejection, and EMI resilience testing.
CYAT81688-100AS77 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)
CYAT81688-100AS77 FAQ
1.How can I place an order for CYAT81688-100AS77 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AS77 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 CYAT81688-100AS77 reliable?
The price and inventory of CYAT81688-100AS77 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AS77 is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AS77?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AS77 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AS77?
CYAT81688-100AS77 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AS77 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 CYAT81688-100AS77?
For technical support, including CYAT81688-100AS77 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AS77 requirements.
6.How does Aetrix verify that CYAT81688-100AS77 is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AS77 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 CYAT81688-100AS77 meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AS77?
All CYAT81688-100AS77 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AS77, 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 CYAT81688-100AS77 part is unused and in its original packaging.
Return procedure for CYAT81688-100AS77:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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