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Infineon Technologies CYAT81688-100AA61T
- Part No.:
- CYAT81688-100AA61T
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AA61T.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,930
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Product details
Overview
CYAT81688-100AA61T 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/sliders, operating at 1.71–5.5 V supply, and featuring integrated analog front-end, programmable firmware, and I²C/SPI/UART host interface - deployed in industrial HMI panels requiring robust noise immunity and glove operation.
For engineers reviewing the CYAT81688-100AA61T datasheet, CYAT81688-100AA61T pinout, CYAT81688-100AA61T application, or CYAT81688-100AA61T equivalent, key selection criteria include mutual-capacitance channel count, integrated firmware configurability, ESD tolerance (±15 kV air), operating voltage range, and host interface flexibility for embedded touch system integration.
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, SAR ADC), and digital peripherals (TCPWM, SCB). It executes TrueTouch firmware that performs real-time signal processing including baseline tracking, noise rejection, and gesture recognition.
The controller supports both self-capacitance (for single-touch button detection) and mutual-capacitance (for multi-touch coordinate tracking) modes, with programmable scan resolution (8–16-bit), scan speed (up to 120 Hz full-panel refresh), and adaptive thresholding to maintain performance across temperature and humidity variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitive Channels | 32 mutual + 32 self-capacitance channels - enables full 5-inch diagonal projected-capacitive touch panel with 10-finger tracking and proximity sensing |
| Supply Voltage | 1.71–5.5 V - supports direct connection to 3.3 V or 5 V system rails without LDO overhead |
| ESD Rating | ±15 kV air, ±8 kV contact - meets IEC 61000-4-2 Level 4 for front-panel touch interfaces |
| Host Interface | I²C (up to 1 MHz), SPI (up to 12 MHz), UART (up to 921.6 kbps) - allows flexible host MCU pairing without protocol translation |
| Firmware Memory | 128 KB flash, 16 KB SRAM - accommodates custom gesture algorithms and field-upgradable touch profiles |
| Operating Temp | −40°C to +85°C - qualified for industrial control cabinet and outdoor kiosk deployments |
Pinout & Package
100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (EPAD) connected to VSS for improved power dissipation during high-scan-rate operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply | Supplies 1.71–5.5 V to all digital I/Os and host interface pins; decoupling required per layout guidelines |
| VDDA | Analog Supply | Provides clean 3.3 V ±10% for CSA and SAR ADC; must be filtered separately from VDDIO |
| SCL / SDA | I²C Bus | Open-drain bidirectional interface compatible with 1.8 V/3.3 V/5 V hosts via pull-up voltage selection |
| TXD / RXD | UART Signals | Full-duplex asynchronous serial link; supports auto-baud detection and hardware flow control |
| CS# / SCLK / MOSI / MISO | SPI Interface | Standard 4-wire SPI with active-low chip select; supports mode 0 and mode 3 clock polarity/phase |
| CTP[0]–CTP[31] | Capsense Terminals | Dedicated analog pins for mutual-capacitance TX/RX routing; require matched trace length and guard ring layout |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Firmware | Field-upgradable TrueTouch firmware via I²C/SPI/UART enables post-deployment tuning of sensitivity, debounce, and gesture logic |
| Glove & Wet-Finger Support | Configurable signal-to-noise ratio and dynamic baseline compensation allow reliable operation with 3 mm gloves and water-covered surfaces |
| Integrated Analog Front-End | On-die CSA with 16-bit resolution and programmable gain eliminates need for external signal conditioning circuitry |
| Multi-Protocol Host Interface | Single hardware interface supports I²C, SPI, or UART without pin reconfiguration - reduces BOM and layout complexity |
| Hardware Accelerated Gesture Engine | Dedicated digital logic block performs pinch/zoom, swipe, and tap detection in real time without CPU intervention |
Applications
| Industrial HMI Panels | Medical Device Touchscreens |
|---|---|
Use Scenario: Operator interface on PLC-mounted control panels in factory automation environments with oil mist, dust, and EMI exposure. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing 24-button + 4-slider overlay with real-time response (<15 ms latency). Use Value: ±15 kV ESD rating and −40°C to +85°C operation ensure reliability in unconditioned industrial enclosures. | Use Scenario: Touch interface on portable ultrasound and infusion pump displays requiring sterile-glove operation and liquid-tolerance. IC Role / Device Role / Timing Role: Dual-mode (self/mutual) controller enabling simultaneous button press and multi-finger gesture input under clinical conditions. Use Value: Adaptive baseline tracking maintains accuracy despite condensation and repeated alcohol wipe cleaning. |
| Smart Building Control Panels | Automotive Infotainment Prototypes |
Use Scenario: Wall-mounted HVAC and lighting controllers in commercial buildings with variable ambient light and temperature gradients. IC Role / Device Role / Timing Role: Low-power capacitive sensor hub interfacing to ESP32 host via I²C, supporting wake-on-touch from deep sleep. Use Value: Integrated 16-bit SAR ADC monitors panel temperature for automatic sensitivity compensation across seasons. | Use Scenario: Rapid-prototype infotainment UI for EV dashboard evaluation using FR4-based test fixtures before ASIC tape-out. IC Role / Device Role / Timing Role: Reconfigurable touch controller validating mutual-capacitance matrix layout and firmware gesture algorithms pre-production. Use Value: On-chip ARM Cortex-M0+ enables execution of automotive-grade gesture stacks without external microcontroller dependency. |
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 mutual), no integrated TrueTouch firmware, requires external host-driven algorithm implementation | Suitable for simple button-only overlays without multi-touch or gesture requirements | Select when cost sensitivity outweighs need for advanced touch features and firmware abstraction |
| MTCH6302-I/SS | Fixed-function ASIC (no programmable CPU), supports only I²C, max 20 mutual channels, no glove/wet support | Targeted at consumer appliances with static UI and low ESD requirements (IEC 61000-4-2 Level 2) | Choose for high-volume white goods where firmware flexibility and industrial ESD are not required |
Compared with CY8C4014LQI-422 and MTCH6302-I/SS, CYAT81688-100AA61T delivers higher channel density, field-upgradable firmware, and certified industrial ESD robustness - making it optimal for complex, evolving HMI designs where long-term feature scalability matters.
Availability
CYAT81688-100AA61T is available at Aetrix Electronics and suitable for industrial HMI panels, medical device touchscreens, smart building control systems, and automotive infotainment prototypes requiring stable component supply and long-term design-in support.
Supply support for CYAT81688-100AA61T 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 ICs, security controllers, and programmable mixed-signal devices.
CYAT81688 belongs to the PSoC 4 TrueTouch family, engineered specifically for high-reliability capacitive touch applications demanding programmability, noise immunity, and seamless integration into resource-constrained embedded systems.
FAQ
What host microcontrollers are compatible with CYAT81688-100AA61T?
CYAT81688-100AA61T supports standard I²C, SPI, and UART protocols with voltage-tolerant I/Os, enabling direct interface to common MCUs including STM32, NXP Kinetis, Renesas RA, and Espressif ESP32 families. No level-shifting is required for 3.3 V hosts, and 5 V tolerant pins simplify connection to legacy 5 V controllers.
Does CYAT81688-100AA61T support raw capacitance data streaming?
Yes - the device provides a debug mode that outputs unprocessed raw mutual/self-capacitance values over UART at up to 100 Hz, allowing real-time signal analysis and custom algorithm development. This mode is accessible via dedicated command sequence and does not require firmware modification.
Can the TrueTouch firmware be customized for proprietary gestures?
Infineon provides the TrueTouch Configuration Utility (TTU) and firmware SDK, enabling engineers to define custom gestures (e.g., three-finger rotate, double-tap-and-hold), adjust sensitivity thresholds per electrode, and tune baseline update rates - all without modifying core firmware binaries.
Is thermal pad soldering required for CYAT81688-100AA61T?
Yes - the exposed thermal pad (EPAD) must be soldered to a solid copper pour connected to VSS for thermal and electrical stability. Failure to connect the EPAD results in elevated junction temperature (>110°C at full scan rate), leading to measurement drift and potential firmware reset events.
CYAT81688-100AA61T 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 ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 100-TQFP (14x14)
CYAT81688-100AA61T FAQ
1.How can I place an order for CYAT81688-100AA61T through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AA61T 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 CYAT81688-100AA61T reliable?
The price and inventory of CYAT81688-100AA61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AA61T is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AA61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AA61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AA61T?
CYAT81688-100AA61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AA61T 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 CYAT81688-100AA61T?
For technical support, including CYAT81688-100AA61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AA61T requirements.
6.How does Aetrix verify that CYAT81688-100AA61T is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AA61T 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 CYAT81688-100AA61T meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AA61T?
All CYAT81688-100AA61T units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AA61T, 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 CYAT81688-100AA61T part is unused and in its original packaging.
Return procedure for CYAT81688-100AA61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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