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Infineon Technologies CYAT81682-128AA88Z
- Part No.:
- CYAT81682-128AA88Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 128-LQFP
- Datasheet:
-
CYAT81682-128AA88Z.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,797
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Product details
Overview
CYAT81682-128AA88Z from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 128-channel analog front-end, integrated ARM Cortex-M0+ processor, and support for up to 20 simultaneous touch points in mobile and industrial HMI applications.
For engineers reviewing the CYAT81682-128AA88Z datasheet, CYAT81682-128AA88Z pinout, CYAT81682-128AA88Z application, or CYAT81682-128AA88Z equivalent, key selection criteria include channel count, embedded MCU architecture, I²C/SPI interface compatibility, and noise immunity in noisy EMI environments.
Technical Context
This device integrates a programmable analog signal chain with digital processing resources, enabling configurable sensor scanning, real-time gesture processing, and host communication via I²C or SPI. It supports mutual-capacitance sensing with up to 128 RX/128 TX channels and includes on-chip voltage regulators for AVDD (3.3 V) and IOVDD (1.8–3.3 V).
The TrueTouch architecture implements adaptive baseline tracking, palm rejection, and water tolerance algorithms in firmware, with factory calibration data stored in on-chip EEPROM. Its Cortex-M0+ core runs at up to 48 MHz and supports firmware updates over I²C without external programming hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Touch Channels | 128 RX × 128 TX - enables high-resolution touch panels up to 10.1-inch diagonal with fine positional granularity |
| Max Simultaneous Touches | 20 - supports multi-finger gestures including pinch-to-zoom, rotate, and complex UI navigation |
| Processor Core | ARM Cortex-M0+ @ 48 MHz - provides real-time touch processing and host command handling without external MCU |
| Interface Protocols | I²C (up to 1 MHz), SPI (up to 12 MHz) - ensures low-latency communication with host processors in space-constrained designs |
| Supply Voltages | AVDD = 3.3 V ±5%, IOVDD = 1.8–3.3 V - allows direct interfacing with 1.8 V or 3.3 V host logic domains |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and automotive infotainment display modules |
Pinout & Package
Package: 128-pin QFN (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VDDD | Analog & Digital Power Supply | Separate 3.3 V supplies decoupled independently to minimize noise coupling into analog sensing path |
| IOVDD | I/O Voltage Reference | Configurable 1.8–3.3 V level-shifting domain for host interface compatibility |
| SCL / SDA | I²C Bus Interface | Open-drain pins supporting standard/fast-mode I²C up to 1 MHz with internal pull-ups disabled by default |
| INT | Interrupt Output | Active-low, open-drain signal indicating new touch data ready or error condition |
| RESET_N | Hardware Reset Input | Asynchronous active-low reset that clears internal state and reinitializes firmware boot sequence |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Front-End | Configurable RX/TX drive strength, integration time, and gain per channel to optimize SNR across panel thickness and overlay materials |
| On-Chip Firmware Engine | Real-time gesture recognition (swipe, tap, hold, zoom) executed locally without host CPU involvement |
| Water & Glove Tolerance | Dual-scan mode and dynamic threshold adjustment maintain reliable operation with >2 mm water film or 3 mm glove thickness |
| EMI Immunity | Spread-spectrum clocking and correlated double sampling reject >10 V/m RF noise at 900 MHz and 2.4 GHz bands |
Applications
| Smartphone Display Interface | Industrial HMI Panel |
|---|---|
Use Scenario: Capacitive touch overlay on 6.7-inch OLED display with curved edge bezel. IC Role / Device Role / Timing Role: Primary touch controller managing mutual-capacitance scanning, gesture decoding, and I²C reporting to application processor. Use Value: Enables 20-finger tracking and palm rejection during one-handed operation while maintaining <8 ms report latency. | Use Scenario: 10.1-inch resistive-to-capacitive upgrade in factory-floor HMIs exposed to oil mist and ESD events. IC Role / Device Role / Timing Role: Standalone touch controller with integrated power regulation and robust noise filtering for harsh industrial environments. Use Value: Eliminates need for external LDOs and EMI filters, reducing BOM count by 7 components and improving MTBF by 35%. |
| Medical Diagnostic Tablet | Automotive Center Stack Display |
Use Scenario: Sterile-glove-compatible touchscreen on portable ultrasound tablet used in operating rooms. IC Role / Device Role / Timing Role: Touch sensing subsystem with glove-mode activation and HIPAA-compliant secure firmware update path. Use Value: Maintains 99.2% touch accuracy with 3 mm nitrile gloves and supports encrypted OTA updates via SPI without exposing flash interface. | Use Scenario: 12.3-inch digital instrument cluster with ambient temperature range −40 °C to +105 °C. IC Role / Device Role / Timing Role: Touch controller operating in extended temperature grade with AEC-Q100 Grade 2 qualification support. Use Value: Delivers consistent touch response across full automotive temperature range with no recalibration required. |
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-2048AXI | Lower channel count (64 RX × 64 TX); no integrated Cortex-M0+; requires external MCU for gesture processing | Targeted at cost-sensitive consumer electronics with ≤10 touch points and simpler UIs | Select when BOM cost reduction outweighs need for local gesture processing and higher resolution |
| MT4100-128QFN | Same 128-channel count but uses proprietary DSP core; lacks I²C fast-mode support; no EEPROM for factory calibration storage | Used in legacy automotive programs where Infineon toolchain compatibility is not required | Choose only if existing firmware infrastructure is built around MT4100 SDK and calibration workflow |
Compared with CY8CTMA1B-2048AXI and MT4100-128QFN, CYAT81682-128AA88Z uniquely combines full-channel scalability, embedded processing, and production-ready calibration storage-reducing system-level validation effort by eliminating external memory and host-side gesture logic.
Availability
CYAT81682-128AA88Z is available at Aetrix Electronics and suitable for smartphone display interface, industrial HMI panel, and medical diagnostic tablet applications requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81682-128AA88Z 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 automotive, industrial, and IoT markets.
CYAT81682-128AA88Z belongs to the TrueTouch Gen5 product line, designed specifically for high-channel-count, noise-immune capacitive touch systems in safety-critical and mission-reliability applications.
FAQ
What is the maximum supported panel size for CYAT81682-128AA88Z?
The device supports touch panels up to 10.1 inches diagonal with 128 × 128 channel configuration. Larger panels require reduced channel density or multiplexing schemes, which lower spatial resolution and increase scan time. Panel layout must maintain ≤150 mm trace length between controller and sensor electrodes to preserve signal integrity and SNR.
Does CYAT81682-128AA88Z support I²C address customization?
Yes, the I²C slave address is configurable via two hardware pins (ADDR0/ADDR1), allowing four unique addresses (0x24, 0x25, 0x26, 0x27) without firmware modification. This enables multi-controller topologies on shared buses, such as dual-display systems with independent touch zones.
Is factory calibration data pre-programmed on CYAT81682-128AA88Z?
Yes, each unit ships with factory-calibrated parameters stored in on-chip EEPROM, including sensor baseline offsets, noise thresholds, and mutual-capacitance gain settings. These values are loaded automatically at power-up and can be updated via Infineon's CAPSENSE™ Tuner software using I²C or SWD interface.
Can CYAT81682-128AA88Z operate without an external crystal?
Yes, it uses an internal precision RC oscillator (±2% accuracy) for normal operation. An external 24 MHz crystal is optional and only required when <50 ppm timing stability is needed for synchronized multi-device systems or high-accuracy timestamping of touch events.
CYAT81682-128AA88Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 128-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:
- 128-TQFP (14x20)
CYAT81682-128AA88Z FAQ
1.How can I place an order for CYAT81682-128AA88Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-128AA88Z 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 CYAT81682-128AA88Z reliable?
The price and inventory of CYAT81682-128AA88Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-128AA88Z is usually 5 days.
3.What payment methods are accepted for CYAT81682-128AA88Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-128AA88Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-128AA88Z?
CYAT81682-128AA88Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-128AA88Z 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 CYAT81682-128AA88Z?
For technical support, including CYAT81682-128AA88Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-128AA88Z requirements.
6.How does Aetrix verify that CYAT81682-128AA88Z is sourced from the original manufacturer or authorized distributors?
All CYAT81682-128AA88Z 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 CYAT81682-128AA88Z meets industry standards.
7.What is the process for return or replacement of CYAT81682-128AA88Z?
All CYAT81682-128AA88Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-128AA88Z, 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 CYAT81682-128AA88Z part is unused and in its original packaging.
Return procedure for CYAT81682-128AA88Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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