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Infineon Technologies CYAT81682-100AA77Z
- Part No.:
- CYAT81682-100AA77Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81682-100AA77Z.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,377
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Product details
Overview
CYAT81682-100AA77Z from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-pin TQFP package, supporting up to 32 sensing channels, 10-bit resolution, and integrated analog front-end for mutual-capacitance scanning in mobile and industrial HMI applications.
For engineers reviewing the CYAT81682-100AA77Z datasheet, CYAT81682-100AA77Z pinout, CYAT81682-100AA77Z application, or CYAT81682-100AA77Z equivalent, key selection criteria include channel count, scan speed (≤15 ms full-frame), I²C/SPI interface support, built-in noise immunity algorithms, and operating voltage range (2.7–5.5 V).
Technical Context
This device integrates a programmable ARM Cortex-M0+ MCU core with dedicated capacitive-sensing hardware accelerators, enabling real-time touch processing without host CPU intervention. It supports both self- and mutual-capacitance modes, with configurable scan resolution and adaptive baseline tracking.
The TrueTouch architecture includes on-chip charge-transfer ADCs, digital filtering blocks, and firmware-configurable gesture engines for swipe, pinch, and multi-finger tracking. It operates across -40°C to +85°C and meets IEC 61000-4-6 conducted immunity requirements at 10 Vrms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensing Channels | Up to 32 independent X/Y electrodes - enables high-resolution touch panels up to 10.1-inch diagonal. |
| ADC Resolution | 10-bit - provides sufficient dynamic range for detecting sub-100 fF capacitance changes. |
| Scan Time | ≤15 ms per full frame - supports ≥60 Hz reporting rate for smooth UI interaction. |
| Interface | I²C (up to 1 MHz) and SPI (up to 12 MHz) - allows flexible host integration with microcontrollers or APs. |
| Supply Voltage | 2.7–5.5 V - compatible with single-cell Li-ion, USB-powered, and industrial 3.3/5 V rails. |
| Operating Temp | -40°C to +85°C - qualified for automotive interior and industrial panel deployments. |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O supply rail | Supplies 1.71–5.5 V to GPIOs and interface logic; decoupling required per pin group. |
| VDDA | Analog supply | Provides clean 2.7–5.5 V to sensing front-end; must be filtered separately from digital rails. |
| SDA/SCL | I²C bidirectional bus | Open-drain pins requiring external pull-ups; support standard/fast-mode timing. |
| 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 new touch data or error condition. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable ARM Cortex-M0+ | Enables field-upgradable firmware and custom gesture logic without changing hardware. |
| Dedicated touch accelerator block | Offloads raw capacitance measurement and baseline compensation from CPU, reducing latency by >40%. |
| Integrated noise rejection | Supports operation under 10 Vrms conducted RF noise (IEC 61000-4-6) without external shielding. |
| Multi-finger tracking | Simultaneous detection and reporting of up to 10 touch points with centroid accuracy ≤1.5 mm. |
Applications
| Smartphone Touch Interface | Industrial HMI Panel |
|---|---|
Use Scenario: Capacitive touch overlay on 5.5-inch AMOLED display with glove and wet-finger operation. IC Role / Device Role / Timing Role: Primary touch controller handling mutual-capacitance scanning, gesture decoding, and I²C host communication. Use Value: Delivers 100 Hz report rate with <20 ms end-to-end latency and automatic water rejection without firmware modification. | Use Scenario: 7-inch resistive-to-capacitive upgrade in factory-floor operator terminal exposed to EMI and temperature cycling. IC Role / Device Role / Timing Role: Standalone touch processor interfacing to ARM-based PLC controller via SPI, managing electrode calibration autonomously. Use Value: Maintains stable tracking across -25°C to +70°C ambient with no recalibration needed over 12-month deployment. |
| Automotive Center Stack | Medical Diagnostic Tablet |
Use Scenario: 10.25-inch infotainment display in vehicle cabin with high-voltage DC-DC noise and HVAC airflow. IC Role / Device Role / Timing Role: Safety-relevant touch coordinator with ASIL-B capable diagnostics and dual-CRC protected firmware updates. Use Value: Passes ISO 11452-4 bulk current injection testing at 300 mA with no false touches or lockups. | Use Scenario: Sterilizable tablet used in radiology suite with alcohol wipe exposure and ESD-prone environment. IC Role / Device Role / Timing Role: Immune touch controller with IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) certified discharge handling. Use Value: Sustains full functionality after 10,000 ESD events without parameter drift or firmware reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8CTMA1D-100AXI | Same PSoC TrueTouch family but with 16-channel limit and no ARM core - relies on host processor for gesture logic. | Suitable only for low-channel-count panels (<5 inch) where host has spare CPU cycles. | Select when BOM cost reduction outweighs need for autonomous multi-touch processing. |
| ATMXT224E-ASU | Microchip maXTouch controller with 224-node capacity, but requires external flash and lacks integrated MCU. | Better suited for large-format displays (>12 inch); higher power consumption in active mode. | Choose for ultra-high-resolution panels where channel density exceeds CYAT81682's 32-channel limit. |
Compared with CY8CTMA1D-100AXI, CYAT81682-100AA77Z delivers autonomous gesture processing and higher channel count; versus ATMXT224E-ASU, it offers lower system-level BoM cost and integrated firmware storage but trades off maximum node count.
Availability
CYAT81682-100AA77Z is available at Aetrix Electronics and suitable for smartphone touch interfaces, industrial HMI panels, and automotive center stack systems requiring stable component supply and long-term production continuity.
Supply support for CYAT81682-100AA77Z 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, sensor, and microcontroller solutions for automotive, industrial, and IoT markets.
CYAT81682 belongs to the PSoC TrueTouch product line, designed specifically for robust, high-performance capacitive touch control in electrically noisy and thermally demanding environments.
FAQ
What is the maximum supported electrode count for mutual-capacitance operation?
CYAT81682-100AA77Z supports up to 32 total sensing electrodes (X + Y), enabling configurations such as 16×16 mutual-capacitance grids. Electrode count is fixed in hardware; firmware defines active X/Y subsets per scan cycle.
Does this device require external flash memory for firmware storage?
No. The device integrates 256 KB of on-chip flash memory, sufficient to store full TrueTouch firmware, configuration parameters, and user-defined gesture algorithms without external memory components.
Is the thermal pad on the TQFP package electrically connected?
Yes. The exposed thermal pad is internally tied to VSSA (analog ground) and must be soldered to a PCB thermal plane for proper heat dissipation and noise immunity. No voltage isolation is required.
Can the device operate with a 1.8 V I/O supply while using 3.3 V for analog circuitry?
No. VDDIO and VDDA share the same voltage domain specification (2.7–5.5 V). The device does not support split-rail I/O; both supplies must fall within the overlapping 2.7–5.5 V range and be independently decoupled.
CYAT81682-100AA77Z 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 ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 100-TQFP (14x14)
CYAT81682-100AA77Z FAQ
1.How can I place an order for CYAT81682-100AA77Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-100AA77Z 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 CYAT81682-100AA77Z reliable?
The price and inventory of CYAT81682-100AA77Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-100AA77Z is usually 5 days.
3.What payment methods are accepted for CYAT81682-100AA77Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-100AA77Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-100AA77Z?
CYAT81682-100AA77Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-100AA77Z 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 CYAT81682-100AA77Z?
For technical support, including CYAT81682-100AA77Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-100AA77Z requirements.
6.How does Aetrix verify that CYAT81682-100AA77Z is sourced from the original manufacturer or authorized distributors?
All CYAT81682-100AA77Z 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 CYAT81682-100AA77Z meets industry standards.
7.What is the process for return or replacement of CYAT81682-100AA77Z?
All CYAT81682-100AA77Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-100AA77Z, 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 CYAT81682-100AA77Z part is unused and in its original packaging.
Return procedure for CYAT81682-100AA77Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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