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Infineon Technologies CYAT81689-100AS77Z
- Part No.:
- CYAT81689-100AS77Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81689-100AS77Z.pdf
- Description:
- TrueTouch
- Quantity:
- Payment:
- Shipping:
Inventory:1,672
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Product details
Overview
CYAT81689-100AS77Z from Infineon Technologies is a capacitive touch controller IC designed for single-chip multi-touch sensing in consumer and industrial human-machine interfaces. It supports up to 10 simultaneous touch points, operates at 3.3 V supply, integrates on-chip analog front-end and digital signal processor, and delivers <15 ms report rate - deployed in kiosks, point-of-sale terminals, and interactive displays.
For engineers reviewing the CYAT81689-100AS77Z datasheet, CYAT81689-100AS77Z pinout, CYAT81689-100AS77Z application, or CYAT81689-100AS77Z equivalent, key selection criteria include mutual-capacitance scan architecture, I²C/SPI interface support, built-in noise suppression for noisy EMI environments, and firmware-upgradable gesture engine.
Technical Context
The CYAT81689-100AS77Z implements a dedicated mutual-capacitance sensing architecture with integrated charge-transfer ADCs per sensor channel, enabling high SNR and robust finger tracking under wet or gloved conditions. It embeds a 32-bit RISC core for real-time touch processing and includes hardware-accelerated algorithms for palm rejection and hover detection.
It supports dual-interface operation (I²C up to 1 MHz and SPI up to 12 MHz), features programmable scan timing and electrode drive strength (0–30 mA), and provides configurable interrupt signaling (active-low, open-drain) synchronized to frame completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Touch Points | 10 - enables full multi-finger gesture recognition including pinch-to-zoom and rotate. |
| Supply Voltage | 3.3 V ±5% - compatible with standard logic rails; no external LDO required. |
| Report Rate | <15 ms - ensures sub-67 Hz latency for responsive UI interaction. |
| Interface | I²C (1 MHz) / SPI (12 MHz) - allows flexible host integration with microcontrollers or application processors. |
| Operating Temp | −40°C to +85°C - qualified for industrial and outdoor HMI deployments. |
| Electrode Count | Up to 64 TX/RX channels - supports large-format touch panels up to 15.6-inch diagonal. |
Pinout & Package
Package: 64-pin QFN (9 mm × 9 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O power supply | 3.3 V input; decoupling capacitor required at pin for noise immunity. |
| GND | Ground reference | Common return path for analog/digital sections; tied to thermal pad. |
| SCL / SDA | I²C serial clock/data | Bi-directional, 3.3 V tolerant; internal pull-ups disabled by default. |
| MOSI / MISO / SCLK / CS# | SPI interface signals | Configurable as primary or secondary interface; CS# active-low enables device selection. |
| INT# | Interrupt output | Open-drain, active-low; asserts when new touch data is ready for host read. |
| RESET# | Hardware reset input | Active-low asynchronous reset; minimum pulse width 1 µs. |
| TX[0:31], RX[0:31] | Capacitive sense electrodes | Programmable as transmit or receive; each pair forms mutual-capacitance node. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated noise suppression | Real-time adaptive filtering against 50/60 Hz mains, RF coupling, and LCD switching noise. |
| Firmware-upgradable gesture engine | Field-updateable via I²C/SPI; supports custom gesture definitions without hardware change. |
| Wet finger & gloved touch support | Configurable sensitivity and baseline tracking enable reliable operation with water coverage or thick gloves. |
| Low-power idle mode | 12 µA typical current draw; wake-on-touch latency <50 ms. |
Applications
| Interactive Kiosk | Point-of-Sale Terminal |
|---|---|
Use Scenario: Public self-service kiosk in retail or transportation hub with high ambient light and variable user interaction patterns. IC Role / Device Role / Timing Role: Primary touch controller managing all capacitive sensing, coordinate calculation, and gesture interpretation. Use Value: Enables fast, accurate multi-touch response even with wet fingers or stylus use, reducing transaction abandonment. | Use Scenario: Compact countertop POS system requiring seamless integration with payment peripherals and thermal printer. IC Role / Device Role / Timing Role: Dedicated touch interface processor offloading gesture handling from main MCU. Use Value: Reduces host CPU load and ensures deterministic touch latency below 20 ms for cashier responsiveness. |
| Industrial Control Panel | Digital Signage Display |
Use Scenario: Factory-floor HMI panel exposed to dust, vibration, and EMI from motor drives and inverters. IC Role / Device Role / Timing Role: Robust capacitive sensing front-end with hardware-based noise rejection and wide temperature operation. Use Value: Maintains stable touch performance without recalibration across −40°C to +85°C and high EMI environments. | Use Scenario: Large-format commercial display in shopping malls with ambient sunlight and frequent user interaction. IC Role / Device Role / Timing Role: High-channel-count touch controller supporting up to 64 electrodes for 15.6-inch projected-capacitive overlay. Use Value: Delivers uniform sensitivity and minimal parallax across full display area with factory-trimmed calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip maXTouch mXT224E | 48-channel max, fixed 5 V supply, no SPI interface, lower max report rate (20 ms). | Limited to smaller panels (<10.1"); lacks wet-finger optimization and firmware-upgradable gestures. | Choose if legacy 5 V system integration is required and panel size is constrained. |
| STMicroelectronics STMTS321 | Supports only 5-point touch, 1.8 V I/O, no integrated gesture engine - requires host-side processing. | Suitable for cost-sensitive, low-channel-count designs where host MCU handles gesture logic. | Prefer when BOM cost is critical and host has spare processing bandwidth for touch algorithm execution. |
Compared with CYAT81689-100AS77Z, the mXT224E trades channel count and interface flexibility for mature ecosystem support, while the STMTS321 shifts computational load to host - making CYAT81689-100AS77Z optimal for standalone, high-channel, field-upgradable HMIs.
Availability
CYAT81689-100AS77Z is available at Aetrix Electronics and suitable for interactive kiosks, point-of-sale terminals, and industrial control panels requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for CYAT81689-100AS77Z 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, and human interface solutions with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.
The CYAT81689 series belongs to Infineon's TrueTouch product line, engineered specifically for high-reliability, noise-immune capacitive touch control in demanding commercial and industrial environments.
FAQ
What is the maximum number of electrodes supported by CYAT81689-100AS77Z?
The CYAT81689-100AS77Z supports up to 64 electrodes (32 TX + 32 RX), enabling configuration for large-format projected-capacitive touch panels up to 15.6 inches. Electrode mapping is fully programmable via firmware, and channel assignment is retained across power cycles using non-volatile configuration storage.
Does CYAT81689-100AS77Z require an external crystal or oscillator?
No. The CYAT81689-100AS77Z integrates a precision internal RC oscillator for system timing and does not require an external crystal. Its internal clock achieves ±2% accuracy over temperature and voltage, sufficient for touch reporting timing and interface synchronization without added BOM cost or layout area.
Can CYAT81689-100AS77Z operate with wet or gloved fingers?
Yes. It includes adaptive baseline tracking and configurable sensitivity thresholds optimized for wet-finger and gloved-touch operation. Factory-tuned parameters and real-time noise compensation allow reliable detection with up to 2 mm water layer or 3 mm glove thickness without hardware modification.
Is firmware update supported in-field via I²C or SPI?
Yes. The device supports full firmware updates over I²C or SPI using a secure, segmented bootloader. Updates preserve calibration data and user configuration, and verification checksums ensure integrity. Field upgrades enable new gesture support, noise profile adaptation, and bug fixes without physical rework.
CYAT81689-100AS77Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Touchscreen:
- 2 Wire Capacitive
- Resolution (Bits):
- 32 b
- 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)
CYAT81689-100AS77Z FAQ
1.How can I place an order for CYAT81689-100AS77Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81689-100AS77Z 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 CYAT81689-100AS77Z reliable?
The price and inventory of CYAT81689-100AS77Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81689-100AS77Z is usually 5 days.
3.What payment methods are accepted for CYAT81689-100AS77Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81689-100AS77Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81689-100AS77Z?
CYAT81689-100AS77Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81689-100AS77Z 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 CYAT81689-100AS77Z?
For technical support, including CYAT81689-100AS77Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81689-100AS77Z requirements.
6.How does Aetrix verify that CYAT81689-100AS77Z is sourced from the original manufacturer or authorized distributors?
All CYAT81689-100AS77Z 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 CYAT81689-100AS77Z meets industry standards.
7.What is the process for return or replacement of CYAT81689-100AS77Z?
All CYAT81689-100AS77Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81689-100AS77Z, 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 CYAT81689-100AS77Z part is unused and in its original packaging.
Return procedure for CYAT81689-100AS77Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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