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Infineon Technologies CYAT81688-100AS61T
- Part No.:
- CYAT81688-100AS61T
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AS61T.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
CYAT81688-100AS61T from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-pin TQFP package, supporting up to 64 mutual-capacitance sensing channels and 32 self-capacitance channels, operating from 2.7 V to 5.5 V supply, and designed for automotive-grade touchscreens in instrument clusters and center consoles.
For engineers reviewing the CYAT81688-100AS61T datasheet, CYAT81688-100AS61T pinout, CYAT81688-100AS61T application, or CYAT81688-100AS61T equivalent, key selection criteria include its AEC-Q100 Grade 2 qualification, integrated analog front-end with programmable gain amplifiers, on-chip firmware for gesture recognition, and support for wet-finger and gloved-finger operation in harsh environments.
Technical Context
This device integrates a 32-bit ARM Cortex-M0+ MCU core with dedicated capacitive-sensing hardware including sigma-delta modulators, digital filtering blocks, and real-time baseline tracking logic. It implements adaptive scanning algorithms to suppress noise from display interference and EMI sources common in automotive infotainment systems.
The TrueTouch architecture supports multi-touch tracking with up to 10 simultaneous finger positions, includes built-in I²C and SPI host interfaces, and features configurable interrupt outputs for proximity wake-up and low-power gesture detection without host processor involvement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - supports direct connection to automotive 3.3 V or 5 V rails without external regulators |
| Sensing Channels | 64 mutual + 32 self - enables high-resolution touch panels up to 12.3-inch diagonal with fine-grained gesture detection |
| Operating Temperature | −40 °C to +105 °C - meets AEC-Q100 Grade 2 requirements for under-hood and dashboard mounting |
| Interface | I²C (up to 1 MHz) and SPI (up to 12 MHz) - allows flexible host integration with microcontrollers or application processors |
| Firmware Storage | On-chip flash memory - enables field-upgradable touch algorithms and calibration profiles without external memory |
| ESD Protection | ±15 kV HBM - ensures robustness against electrostatic discharge during assembly and end-user interaction |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad for automotive thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O supply rail | Supplies 1.8 V or 3.3 V to GPIOs and interface logic; independent from core voltage domain |
| VDDA | Analog supply | Powers sigma-delta modulators and sensor front-end; requires low-noise decoupling for SNR integrity |
| SDA/SCL | I²C bidirectional data/clock | Configurable as primary or secondary I²C interface; supports standard and fast-mode timing |
| MOSI/MISO/SCLK/SSN | SPI interface signals | Full-duplex SPI with slave select polarity configurable for compatibility with diverse host controllers |
| INT | Interrupt output | Open-drain active-low signal indicating touch event, gesture completion, or error condition |
| RESET_N | Active-low reset input | Hardware reset with internal pull-up; synchronizes internal state machines and clears touch buffer |
Key Features
| Feature | Design Value |
|---|---|
| Wet-finger and gloved-finger support | Capacitive sensing algorithm dynamically adjusts threshold and filtering to maintain detection under moisture or textile cover |
| Display noise immunity | Adaptive frequency hopping and synchronized blanking eliminate coupling from LCD/LED backlight switching transients |
| Low-power gesture wake-up | Sub-100 µA deep-sleep current with hardware-accelerated swipe/proximity detection without CPU wake-up |
| AEC-Q100 Grade 2 compliance | Qualified for automotive applications requiring −40 °C to +105 °C operation and extended reliability testing |
Applications
| Instrument Cluster Touch Interface | Center Console Touch Panel |
|---|---|
Use Scenario: Driver interaction with digital speedometer, navigation controls, and vehicle settings via glass-covered TFT display. IC Role / Device Role / Timing Role: Capacitive touch controller managing mutual-capacitance scanning and real-time gesture decoding. Use Value: Enables seamless swiping and pinch-zoom while rejecting false triggers from vibration, EMI, and condensation. | Use Scenario: Passenger control of HVAC, media, and phone connectivity using large-format touchscreen in cabin environment. IC Role / Device Role / Timing Role: Multi-touch coordinator with on-chip gesture engine and I²C host interface to application processor. Use Value: Supports simultaneous 10-finger tracking and wet-finger operation required for shared-use automotive interfaces. |
| Rear Seat Entertainment System | Digital Rearview Mirror Interface |
Use Scenario: Child-accessible media playback and game controls on rear-seat mounted displays. IC Role / Device Role / Timing Role: Self- and mutual-capacitance hybrid scanner with configurable scan matrix for asymmetric panel layouts. Use Value: Delivers consistent touch response across varying panel thicknesses and overlay materials used in OEM trim packages. | Use Scenario: Touch-enabled digital mirror with auto-dimming and camera feed overlay. IC Role / Device Role / Timing Role: Low-latency touch controller interfacing directly to display timing controller via SPI for frame-synchronized updates. Use Value: Achieves <15 ms touch-to-display update latency critical for safety-critical driver feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8CTMA1B-68LTXI | Same PSoC TrueTouch family but 68-pin QFN; lower channel count (48 mutual + 24 self) | Targeted at smaller displays (<10 inch); lacks AEC-Q100 Grade 2 qualification | Select when cost-sensitive non-automotive designs require footprint reduction and relaxed environmental specs |
| MTCH6302-I/SS | Microchip 64-channel controller with 1.8 V I/O only; no AEC-Q100 rating; fixed firmware | Designed for consumer tablets and industrial HMIs; no wet-finger or automotive EMI hardening | Choose for volume consumer applications where automotive qualification and adaptive noise rejection are not required |
Compared with CY8CTMA1B-68LTXI and MTCH6302-I/SS, CYAT81688-100AS61T uniquely combines AEC-Q100 Grade 2 compliance, full wet-finger/gloved-finger support, and programmable firmware in a 100-pin TQFP package optimized for thermal dissipation in automotive cockpit modules.
Availability
CYAT81688-100AS61T is available at Aetrix Electronics and suitable for automotive instrument clusters, center console touch systems, and digital rearview mirror interfaces requiring stable component supply across extended product lifecycles.
Supply support for CYAT81688-100AS61T 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 electronics, and security solutions, with global R&D and manufacturing infrastructure.
CYAT81688-100AS61T belongs to the automotive-qualified TrueTouch PSoC product line, engineered specifically for robust capacitive touch sensing in safety-critical vehicle human-machine interfaces.
FAQ
What is the maximum supported panel size for CYAT81688-100AS61T?
The device supports touch panels up to 12.3 inches diagonal using its full 64 mutual-capacitance channel configuration. Panel size depends on electrode pitch, overlay thickness, and signal-to-noise ratio; reference designs validate operation on 12.3-inch automotive TFTs with 1.1 mm glass overlay and 200 µm ITO trace width.
Does CYAT81688-100AS61T support I²C multi-master configurations?
Yes, it supports I²C multi-master mode with clock stretching and arbitration handling per SMBus 2.0 specification. The device implements hardware-level arbitration resolution and maintains bus state integrity during concurrent access by multiple hosts in distributed automotive architectures.
Can the onboard firmware be customized for proprietary gestures?
Yes, Infineon provides PSoC Creator IDE and TrueTouch Tuning Suite to modify firmware parameters, add custom gesture definitions, and recompile application code. Customers retain full control over firmware behavior through licensed development tools and documented API libraries.
Is an external crystal required for CYAT81688-100AS61T operation?
No external crystal is required. The device integrates a factory-trimmed 24 MHz internal oscillator with ±2% accuracy over temperature and voltage, sufficient for all timing-critical touch scanning and communication functions. An external crystal may be added only if tighter timing precision is needed for specific host synchronization.
CYAT81688-100AS61T 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)
CYAT81688-100AS61T FAQ
1.How can I place an order for CYAT81688-100AS61T through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AS61T 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 CYAT81688-100AS61T reliable?
The price and inventory of CYAT81688-100AS61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AS61T is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AS61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AS61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AS61T?
CYAT81688-100AS61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AS61T 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 CYAT81688-100AS61T?
For technical support, including CYAT81688-100AS61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AS61T requirements.
6.How does Aetrix verify that CYAT81688-100AS61T is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AS61T 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 CYAT81688-100AS61T meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AS61T?
All CYAT81688-100AS61T units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AS61T, 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 CYAT81688-100AS61T part is unused and in its original packaging.
Return procedure for CYAT81688-100AS61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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