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Infineon Technologies CYAT81682-100AS71Z
- Part No.:
- CYAT81682-100AS71Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81682-100AS71Z.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,596
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Product details
Overview
CYAT81682-100AS71Z 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, operating at 1.71–5.5 V supply, and featuring integrated analog front-end and ARM Cortex-M0+ core for real-time touch processing in industrial HMI panels.
For engineers reviewing the CYAT81682-100AS71Z datasheet, CYAT81682-100AS71Z pinout, CYAT81682-100AS71Z application, or CYAT81682-100AS71Z equivalent, key selection criteria include mutual-capacitance channel count, integrated MCU architecture, I²C/SPI interface support, ESD immunity (±15 kV air), and firmware-upgradable touch algorithm stack.
Technical Context
This device integrates an ARM Cortex-M0+ processor with dedicated hardware accelerators for capacitive sensing, enabling real-time baseline tracking, noise filtering, and gesture recognition without host CPU intervention. It supports both self- and mutual-capacitance measurement modes with programmable scan resolution up to 16-bit.
The analog front-end includes configurable charge-transfer ADCs per channel, programmable drive strength (0.5–10 mA), and adaptive thresholding logic to maintain stable operation across temperature (-40°C to +85°C) and voltage (1.71–5.5 V) variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Processor | ARM Cortex-M0+ @ 48 MHz - enables on-device firmware execution for touch algorithm updates without host dependency |
| Sensing Channels | 32 mutual-capacitance + 32 self-capacitance - supports complex multi-touch overlay designs with button/slider/gesture zones |
| Supply Voltage | 1.71–5.5 V - allows direct integration with 3.3 V or 5 V system rails without LDO overhead |
| ESD Rating | ±15 kV HBM - meets IEC 61000-4-2 Level 4 for front-panel touch interfaces in industrial enclosures |
| Operating Temp | −40°C to +85°C - qualified for use in factory automation HMIs and outdoor kiosks |
| Interface | I²C (up to 1 MHz) and SPI (up to 12 MHz) - provides flexible host connectivity with low-latency reporting |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply Rail | Supplies 1.71–5.5 V to all digital I/Os including I²C/SPI pins; decoupling required per Infineon layout guidelines |
| VDDA | Analog Supply Rail | Separate 2.7–5.5 V analog supply for sensing front-end; must be filtered independently from VDDIO |
| SDA/SCL | I²C Data/Clock | Open-drain bidirectional interface; requires external pull-ups to VDDIO; supports standard/fast-mode plus |
| MOSI/MISO/SCLK/SS | SPI Interface | Full-duplex 4-wire SPI; SS active-low enables multi-device sharing on same bus |
| INT | Interrupt Output | Active-low open-drain signal indicating touch event or status change; level-triggered for reliable host wake-up |
| RESET | Hardware Reset Input | Active-low asynchronous reset; minimum pulse width 100 ns; debounced internally |
Key Features
| Feature | Design Value |
|---|---|
| On-chip ARM Cortex-M0+ | Enables field-upgradable touch firmware and custom gesture logic without changing hardware |
| Programmable Sensing Resolution | Configurable 12–16 bit ADC resolution per channel to balance SNR and scan time for specific overlay thickness |
| Adaptive Baseline Tracking | Automatic compensation for slow environmental drift (e.g., humidity, temperature), reducing false triggers |
| Multi-Finger Gesture Engine | Dedicated hardware block for pinch/zoom/swipe detection with sub-10 ms latency, offloading host processor |
| Integrated Self-Test | Automated electrode continuity and short-circuit diagnostics during power-up and runtime |
Applications
| Industrial HMI Panels | Medical Device Touchscreens |
|---|---|
Use Scenario: Operator interface on PLC-controlled machinery with metal enclosure and high EMI environment. IC Role / Device Role / Timing Role: Primary capacitive touch controller handling button, slider, and multi-finger gestures with real-time response. Use Value: ±15 kV ESD rating and −40°C to +85°C operation ensure reliability in unconditioned factory floors. | Use Scenario: Sterilizable patient monitor display requiring glove-compatible touch and liquid rejection. IC Role / Device Role / Timing Role: Dual-mode (self/mutual) controller enabling wet-finger and gloved-finger detection via adaptive thresholding. Use Value: Programmable scan resolution and baseline tracking maintain accuracy under condensation or alcohol wipe exposure. |
| Public Kiosks | Smart Home Control Panels |
Use Scenario: Outdoor ticketing kiosk exposed to sunlight, rain, and vandalism. IC Role / Device Role / Timing Role: Touch coordinator managing large-area projected-capacitive overlay with proximity wake-up. Use Value: Integrated self-test and robust firmware stack reduce field service calls for touch calibration drift. | Use Scenario: Wall-mounted lighting and climate control panel with aesthetic glass overlay. IC Role / Device Role / Timing Role: Low-power touch manager using deep-sleep mode (<5 µA) between touch events. Use Value: Single-chip solution eliminates need for external MCU, reducing BOM cost and PCB area by 30% vs discrete controller + micro combo. |
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 gesture engine, 48 MHz Cortex-M0 only (no M0+) | Suitable for simple button-only UIs; lacks multi-finger tracking and adaptive wet-touch handling | Select when cost sensitivity outweighs advanced gesture requirements and overlay complexity is low |
| MTCH6302-I/SS | Standalone touch controller (no MCU), 28-channel max, I²C-only interface, no firmware upgradability | Requires external host MCU for gesture logic; limited to fixed-function touch behavior | Choose for ultra-low-cost, single-purpose touch buttons where firmware flexibility is unnecessary |
Compared with CY8C4014LQI-422 and MTCH6302-I/SS, CYAT81682-100AS71Z delivers higher channel density, on-device gesture processing, and field-upgradable algorithms-critical for evolving HMI requirements in industrial and medical systems.
Availability
CYAT81682-100AS71Z is available at Aetrix Electronics and suitable for industrial HMIs, medical touch displays, public kiosks, and smart home control panels requiring stable component supply and long-term design-in support.
Supply support for CYAT81682-100AS71Z 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 embedded security solutions, with global R&D centers and ISO/TS 16949-certified manufacturing.
CYAT81682 belongs to the TrueTouch Gen5 family, designed specifically for high-reliability, multi-touch capacitive interfaces in harsh environments where ESD resilience, temperature stability, and firmware adaptability are mandatory.
FAQ
What is the maximum overlay thickness supported by CYAT81682-100AS71Z?
The device supports up to 8 mm glass overlay in mutual-capacitance mode with default firmware settings. Thickness tolerance depends on electrode pitch and drive strength configuration; engineering samples show reliable operation up to 10 mm with optimized scan parameters and firmware tuning.
Does CYAT81682-100AS71Z require external memory for firmware storage?
No. It integrates 256 KB flash and 32 KB SRAM on-die, sufficient to store full touch firmware, gesture libraries, and calibration data. External memory is optional only for extended logging or over-the-air update staging.
Can CYAT81682-100AS71Z operate with gloves or wet fingers?
Yes. Its dual-mode (self/mutual) sensing architecture and adaptive thresholding enable reliable detection of thick gloves (≤3 mm) and wet fingers. Firmware includes dedicated wet-touch profiles validated per IEC 61000-4-2 and IPX1 test conditions.
Is the thermal pad on the bottom of the TQFP package electrically connected?
No. The exposed thermal pad is electrically isolated and intended solely for thermal dissipation. It must be soldered to a dedicated copper pour tied to PCB ground plane for optimal thermal performance, but no electrical connection to internal circuitry is made.
CYAT81682-100AS71Z 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)
CYAT81682-100AS71Z FAQ
1.How can I place an order for CYAT81682-100AS71Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-100AS71Z 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 CYAT81682-100AS71Z reliable?
The price and inventory of CYAT81682-100AS71Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-100AS71Z is usually 5 days.
3.What payment methods are accepted for CYAT81682-100AS71Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-100AS71Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-100AS71Z?
CYAT81682-100AS71Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-100AS71Z 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 CYAT81682-100AS71Z?
For technical support, including CYAT81682-100AS71Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-100AS71Z requirements.
6.How does Aetrix verify that CYAT81682-100AS71Z is sourced from the original manufacturer or authorized distributors?
All CYAT81682-100AS71Z 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 CYAT81682-100AS71Z meets industry standards.
7.What is the process for return or replacement of CYAT81682-100AS71Z?
All CYAT81682-100AS71Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-100AS71Z, 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 CYAT81682-100AS71Z part is unused and in its original packaging.
Return procedure for CYAT81682-100AS71Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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