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Infineon Technologies CYAT81689-128AS88Z
- Part No.:
- CYAT81689-128AS88Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 128-LQFP
- Datasheet:
-
CYAT81689-128AS88Z.pdf
- Description:
- TrueTouch
- Quantity:
- Payment:
- Shipping:
Inventory:1,461
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Product details
Overview
CYAT81689-128AS88Z from Infineon Technologies is a capacitive touch controller IC designed for multi-touch, gesture-enabled human-machine interfaces. It integrates 128-channel analog front-end, supports up to 10-finger tracking, operates at 3.3 V supply, features built-in noise suppression, and is deployed in industrial HMI panels requiring robust operation under ESD and RF noise.
For engineers reviewing the CYAT81689-128AS88Z datasheet, CYAT81689-128AS88Z pinout, CYAT81689-128AS88Z application, or CYAT81689-128AS88Z equivalent, key selection criteria include mutual-capacitance scan resolution, integrated firmware-based gesture engine, I²C/SPI interface timing compliance, and operating temperature range across extended industrial conditions.
Technical Context
The CYAT81689-128AS88Z implements a dedicated capacitive sensing architecture with programmable sensor drive strength (up to 40 mA per segment), adaptive baseline tracking, and real-time signal-to-noise ratio optimization. Its embedded ARM Cortex-M0+ core executes proprietary touch firmware with configurable debounce, proximity detection, and palm rejection logic.
It supports both self- and mutual-capacitance measurement modes, delivers 12-bit raw data resolution per channel, and includes hardware-accelerated filtering for 50/60 Hz line noise rejection without host CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Touch Channels | 128 analog input channels - enables high-resolution projected-capacitive touch panels up to 15-inch diagonal with fine-grained electrode pitch |
| Supply Voltage | 3.3 V ±5% - compatible with standard industrial LDO rails; no external level-shifting required for I²C/SPI interfaces |
| Firmware Engine | On-chip ARM Cortex-M0+ - executes real-time gesture recognition (swipe, pinch, rotate) without host processor load |
| Interface | I²C (up to 1 MHz) and SPI (up to 10 MHz) - supports direct connection to microcontrollers without protocol translation |
| Operating Temp | −40 °C to +85 °C - qualified for use in factory automation HMIs and outdoor kiosks |
| ESD Rating | ±15 kV HBM - eliminates need for external TVS diodes on touch sensor lines |
Pinout & Package
Package: 88-pin QFN (10 mm × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O supply rail | Supplies 3.3 V to digital interface pins; decoupling required within 10 mm of pin |
| VDDA | Analog supply rail | Independent 3.3 V analog domain; must be filtered separately from VDDIO to preserve SNR |
| SCL / SDA | I²C bidirectional bus | Open-drain configuration; requires 2.2 kΩ pull-up to VDDIO; supports standard/fast-mode timing |
| MOSI / MISO / SCLK / nSS | SPI interface signals | Full-duplex SPI with 4-wire mode; nSS active-low enables multi-device sharing on same bus |
| INT | Interrupt output | Active-low open-drain signal indicating new touch report ready; edge-triggered only |
| RESET | Hardware reset input | Asynchronous active-low reset; minimum pulse width 10 µs; initiates full firmware reinitialization |
Key Features
| Feature | Design Value |
|---|---|
| Integrated gesture engine | Executes swipe, zoom, rotate, and tap classification in firmware-reduces host MCU processing load and latency |
| Adaptive noise cancellation | Dynamically adjusts scan frequency and integration time to suppress 50/60 Hz and burst RF interference without user tuning |
| Self-test and diagnostics | On-demand electrode continuity check and capacitance drift monitoring-enables predictive maintenance in mission-critical HMIs |
| Configurable wake-on-touch | Enters ultra-low-power sleep (<5 µA) and wakes only on valid touch event-extends battery life in portable industrial tools |
Applications
| Industrial HMI Panels | Medical Device Touchscreens |
|---|---|
Use Scenario: Operator interface on PLC-controlled packaging machinery with oil mist, ESD, and ambient RF noise. IC Role / Device Role / Timing Role: Primary touch acquisition and gesture decoding unit; replaces mechanical buttons with sealed glass overlay. Use Value: Enables reliable multi-touch operation at −40 °C to +85 °C with ±15 kV HBM protection-eliminates field failures due to environmental stress. | Use Scenario: Touch interface on portable ultrasound console requiring glove-compatible operation and low-latency response. IC Role / Device Role / Timing Role: Front-end capacitive controller with integrated proximity detection and palm rejection logic. Use Value: Delivers sub-15 ms touch-to-report latency and supports conductive stylus/glove input without firmware modification. |
| Outdoor Kiosks | Automated Test Equipment |
Use Scenario: Public information terminal mounted in uncontrolled environments with wide temperature swings and solar loading. IC Role / Device Role / Timing Role: Core touch sensing IC with auto-calibrating baseline tracking and moisture compensation. Use Value: Maintains stable touch performance despite condensation and temperature-induced capacitance drift-no manual recalibration needed. | Use Scenario: Front-panel interface on benchtop power analyzer with high EMI from switching power supplies. IC Role / Device Role / Timing Role: Isolated touch controller with differential sensing and hardware-based 50/60 Hz notch filtering. Use Value: Achieves >60 dB noise rejection at line frequency-prevents false touches during AC mains-powered measurements. |
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 mXT1664U | 1664-channel capacity; higher pin count (121-pin BGA); requires external flash for firmware storage | Better suited for large-format (>20″) displays; lacks integrated thermal management circuitry | Select when scaling beyond 128 electrodes or requiring dual-display support |
| STMicroelectronics STMT1601 | 160-channel front-end; no embedded ARM core-relies on host MCU for gesture processing | Lower BOM cost but increases host firmware complexity and latency | Select when host MCU has spare cycles and deterministic real-time gesture handling is not required |
Compared with CYAT81689-128AS88Z, the mXT1664U offers greater channel scalability but demands more PCB area and external memory, while the STMT1601 reduces component count at the expense of added host-side processing burden and longer touch response time.
Availability
CYAT81689-128AS88Z is available at Aetrix Electronics and suitable for industrial HMI panels, medical device touchscreens, and outdoor kiosks requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for CYAT81689-128AS88Z 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 secure connectivity solutions, with global R&D and manufacturing infrastructure.
The CYAT81689 series belongs to Infineon's TrueTouch product line, engineered specifically for high-noise industrial and medical touch interfaces requiring robustness, low latency, and firmware-integrated gesture intelligence.
FAQ
What is the maximum supported electrode count for CYAT81689-128AS88Z?
The CYAT81689-128AS88Z supports up to 128 analog input channels, enabling configurations such as 16 × 8 mutual-capacitance grids or 128 self-capacitance sensors. Electrode routing must comply with ≤10 pF parasitic capacitance per channel to maintain SNR above 55 dB.
Does CYAT81689-128AS88Z require external flash memory?
No. The device integrates 512 KB of embedded flash for firmware storage and 64 KB of SRAM for runtime execution. All gesture algorithms, calibration routines, and communication stacks reside on-chip-no external non-volatile memory is needed.
Can CYAT81689-128AS88Z operate with wet or gloved fingers?
Yes. Its adaptive sensitivity control and proximity detection support reliable operation with water droplets (up to 2 mm diameter) and standard latex/nitrile gloves (0.1–0.3 mm thickness). Firmware includes configurable threshold tuning for varying dielectric conditions.
What is the typical current consumption in active and sleep modes?
In active scanning mode (100 Hz report rate), typical current is 12.5 mA. In wake-on-touch sleep mode, it draws <5 µA. Power states are controlled via I²C register writes; transition time from sleep to active is <15 ms.
CYAT81689-128AS88Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 128-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:
- 128-TQFP (14x20)
CYAT81689-128AS88Z FAQ
1.How can I place an order for CYAT81689-128AS88Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81689-128AS88Z 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 CYAT81689-128AS88Z reliable?
The price and inventory of CYAT81689-128AS88Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81689-128AS88Z is usually 5 days.
3.What payment methods are accepted for CYAT81689-128AS88Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81689-128AS88Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81689-128AS88Z?
CYAT81689-128AS88Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81689-128AS88Z 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 CYAT81689-128AS88Z?
For technical support, including CYAT81689-128AS88Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81689-128AS88Z requirements.
6.How does Aetrix verify that CYAT81689-128AS88Z is sourced from the original manufacturer or authorized distributors?
All CYAT81689-128AS88Z 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 CYAT81689-128AS88Z meets industry standards.
7.What is the process for return or replacement of CYAT81689-128AS88Z?
All CYAT81689-128AS88Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81689-128AS88Z, 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 CYAT81689-128AS88Z part is unused and in its original packaging.
Return procedure for CYAT81689-128AS88Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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