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Infineon Technologies CYAT81688-100AS61
- Part No.:
- CYAT81688-100AS61
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AS61.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:897
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Product details
Overview
CYAT81688-100AS61 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, programmable digital signal processing, and I²C/SPI/UART host interface - deployed in industrial HMI panels requiring robust noise immunity and glove operation.
For engineers reviewing the CYAT81688-100AS61 datasheet, CYAT81688-100AS61 pinout, CYAT81688-100AS61 application, or CYAT81688-100AS61 equivalent, key selection criteria include mutual-capacitance channel count, integrated firmware configurability, ESD tolerance (±15 kV air, ±8 kV contact), operating voltage range, and host interface flexibility for embedded GUI subsystems.
Technical Context
This device implements a mixed-signal programmable system-on-chip architecture combining CapSense® sensing hardware with an ARM Cortex-M0+ core running configurable TrueTouch firmware. It supports both self- and mutual-capacitance scanning modes, with real-time baseline tracking and adaptive thresholding to maintain touch accuracy under varying environmental conditions.
The IC integrates dedicated analog sensor interface circuitry including programmable IDACs, sigma-delta modulators, and digital filtering blocks, enabling high SNR (>60 dB) at 120 Hz scan rate while maintaining low active current (1.2 mA typical at 3.3 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitive Sensing Channels | 32 mutual-capacitance + 32 self-capacitance - enables full matrix touchpad or multi-button overlay with independent coordinate resolution |
| Supply Voltage Range | 1.71 V to 5.5 V - supports direct connection to 3.3 V or 5 V system rails without external LDO |
| ESD Robustness | ±15 kV HBM, ±8 kV IEC 61000-4-2 contact - eliminates need for external TVS diodes in most panel designs |
| Host Interface | I²C (up to 1 MHz), SPI (up to 12 MHz), UART (up to 921.6 kbps) - allows flexible integration with MCU, SoC, or FPGA host controllers |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade HMI deployment without derating |
| Firmware Configurability | Field-upgradable via I²C/SPI - enables post-deployment tuning of sensitivity, debounce, gesture recognition, and noise rejection parameters |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (EPAD) connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO / VDDA | Digital & analog power supply | Separate 1.71–5.5 V inputs allow independent rail optimization for noise-sensitive analog sensing |
| SCL / SDA | I²C bidirectional bus lines | Open-drain outputs with internal pull-ups; support standard/fast-mode I²C timing for host communication |
| CS_N / SCLK / MOSI / MISO | SPI interface signals | Enable high-speed configuration and bulk data transfer during initialization or firmware update |
| TX / RX | UART transmit/receive | Asynchronous serial interface for debug logging or legacy host compatibility |
| CTP[0:31] | Capsense electrode connections | Direct routing to PCB trace electrodes; each supports mutual- or self-capacitance measurement |
| INT_N | Interrupt output | Active-low open-drain signal asserted on touch event, gesture completion, or error condition |
Key Features
| Feature | Design Value |
|---|---|
| Glove and wet-finger operation | Configurable sensitivity and dynamic baseline compensation enable reliable detection through 5 mm gloves and water-covered surfaces |
| Integrated CapSense® AFE | Dedicated analog front-end with programmable IDACs, CSD modulator, and digital filtering eliminates external signal conditioning components |
| TrueTouch firmware engine | On-chip ARM Cortex-M0+ executes pre-validated touch algorithms - no host CPU load for raw data processing |
| Multi-touch gesture support | Simultaneous tracking of up to 10 fingers with pinch-to-zoom, swipe, and rotate gestures implemented in firmware |
| Low-power sleep mode | 1.5 µA typical current draw in deep-sleep with wake-on-touch - extends battery life in portable HMIs |
Applications
| Industrial Control Panel | Medical Device Touchscreen |
|---|---|
Use Scenario: Operator interface on PLC-mounted control cabinet with metal enclosure and EMI-rich factory environment. IC Role / Device Role / Timing Role: Capacitive touch controller managing 24-button overlay and 5-inch projected-capacitive display. Use Value: ±15 kV ESD rating and adaptive noise rejection maintain false-touch rate < 0.01% across 40–85 °C ambient. | Use Scenario: Sterile-field touchscreen on infusion pump requiring glove operation and liquid splash resilience. IC Role / Device Role / Timing Role: Primary touch acquisition and gesture decoding unit interfaced to ARM-based medical SoC via I²C. Use Value: Firmware-configurable wet-finger response and 10-finger tracking meet IEC 62304 Class C software requirements. |
| Automotive Infotainment | Smart Home Appliance Panel |
Use Scenario: Center-stack display in passenger vehicle with wide temperature cycling and RF interference from cellular modules. IC Role / Device Role / Timing Role: Mutual-capacitance controller handling 12-button keypad and slider controls adjacent to AM/FM antenna traces. Use Value: Real-time baseline tracking and frequency-hopping scan modulation suppress RF-induced jitter below 2 LSB. | Use Scenario: Oven control panel with glass overlay exposed to steam, grease, and frequent cleaning agents. IC Role / Device Role / Timing Role: Self-capacitance button scanner with proximity wake-up and haptic feedback trigger output. Use Value: Integrated moisture compensation algorithm maintains button responsiveness after condensation exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4046LQI-443 | ARM Cortex-M0, 48-pin QFN, max 24 CapSense channels, no mutual-capacitance support | Limited to small-button arrays; lacks TrueTouch firmware stack and glove/wet operation tuning | Select when cost-sensitive, space-constrained designs require only basic self-capacitance buttons |
| MTCH6302-I/ST | Microchip 64-channel projected-capacitive controller, 64-pin TQFP, no on-chip MCU core | Requires external host processor for gesture logic; higher channel density but no integrated firmware engine | Choose for high-channel-count displays where host-side algorithm customization is preferred over firmware offload |
Compared with CY8C4046LQI-443 and MTCH6302-I/ST, CYAT81688-100AS61 uniquely combines mutual-capacitance scalability, on-device TrueTouch firmware execution, and industrial-grade ESD/noise resilience - making it optimal for certified HMI systems demanding zero-host-touch-processing overhead.
Availability
CYAT81688-100AS61 is available at Aetrix Electronics and suitable for industrial HMI, medical device interfaces, automotive infotainment panels, and smart appliance control systems requiring stable component supply, long-term lifecycle assurance, and full production traceability.
Supply support for CYAT81688-100AS61 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 belongs to the TrueTouch Gen5 family - designed specifically for high-reliability capacitive touch applications requiring robust operation in electrically noisy, temperature-variable, and contamination-prone environments.
FAQ
What host interfaces does CYAT81688-100AS61 support?
CYAT81688-100AS61 supports I²C (up to 1 MHz), SPI (up to 12 MHz), and UART (up to 921.6 kbps) host interfaces. All three are simultaneously accessible via dedicated pins and can be enabled or disabled in firmware. I²C is typically used for configuration and status polling, SPI for high-bandwidth firmware updates, and UART for debug logging or legacy system integration.
Does CYAT81688-100AS61 require external firmware programming before use?
No - CYAT81688-100AS61 ships with factory-programmed TrueTouch Gen5 firmware that supports immediate operation upon power-up and host initialization. Custom configuration (e.g., electrode mapping, sensitivity, gesture thresholds) is performed via host commands using the standard TrueTouch register map; no external flash programmer or JTAG debugger is needed for standard deployment.
Can CYAT81688-100AS61 drive a projected-capacitive (PCAP) display directly?
No - CYAT81688-100AS61 is a touch controller, not a display driver. It acquires raw capacitance data from PCAP sensor layers (e.g., ITO patterns on glass or film) and reports processed touch coordinates and gestures to the host system. Driving the display's pixel array requires a separate display controller or SoC GPU interface.
What is the thermal pad (EPAD) connection requirement for CYAT81688-100AS61?
The exposed thermal pad (EPAD) on the underside of the 100-pin TQFP package must be soldered to a solid copper thermal plane on the PCB, connected directly to VSS. This connection is mandatory for thermal dissipation and electrical stability - floating or unconnected EPAD causes increased junction temperature, reduced noise immunity, and potential firmware reset events above 70 °C ambient.
CYAT81688-100AS61 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)
CYAT81688-100AS61 FAQ
1.How can I place an order for CYAT81688-100AS61 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AS61 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 CYAT81688-100AS61 reliable?
The price and inventory of CYAT81688-100AS61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AS61 is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AS61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AS61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AS61?
CYAT81688-100AS61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AS61 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 CYAT81688-100AS61?
For technical support, including CYAT81688-100AS61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AS61 requirements.
6.How does Aetrix verify that CYAT81688-100AS61 is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AS61 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 CYAT81688-100AS61 meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AS61?
All CYAT81688-100AS61 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AS61, 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 CYAT81688-100AS61 part is unused and in its original packaging.
Return procedure for CYAT81688-100AS61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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