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Infineon Technologies CYAT81688-100AA71
- Part No.:
- CYAT81688-100AA71
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AA71.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:900
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Product details
Overview
CYAT81688-100AA71 from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 16-channel analog front-end, 100-pin TQFP package, and integrated firmware for mutual-capacitance sensing. It supports up to 10-finger tracking and operates across -40°C to +85°C ambient temperature in automotive infotainment displays.
For engineers reviewing the CYAT81688-100AA71 datasheet, CYAT81688-100AA71 pinout, CYAT81688-100AA71 application, or CYAT81688-100AA71 equivalent, key selection criteria include mutual-capacitance scan rate (≥120 Hz), integrated I²C/SPI host interface, programmable noise immunity thresholds, and AEC-Q100 Grade 2 qualification for automotive use.
Technical Context
This device implements a configurable analog front-end with 16 independent RX channels and 8 TX channels, enabling flexible sensor matrix layouts. Its on-die ARM Cortex-M0+ core executes touch algorithm firmware and handles real-time signal processing without external host intervention.
The TrueTouch architecture includes adaptive baseline tracking, dynamic noise filtering, and self-capacitance/mutual-capacitance dual-mode operation. It supports I²C (up to 1 MHz) and SPI (up to 12 MHz) host interfaces with hardware CRC and packet error detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Touch Channels | 16 RX / 8 TX - enables 128-node mutual-capacitance sensing grid for high-resolution touch panels |
| Operating Temp | -40°C to +85°C - qualified for automotive cabin environments per AEC-Q100 Grade 2 |
| Scan Rate | ≥120 Hz full-frame - ensures sub-8.3 ms latency for responsive multi-touch gesture recognition |
| Host Interface | I²C (1 MHz) & SPI (12 MHz) - supports direct connection to MCU without level-shifting or protocol translation |
| Firmware Engine | ARM Cortex-M0+ @ 24 MHz - runs proprietary touch algorithm stack with <10 ms interrupt-to-response latency |
| Supply Voltage | VDD = 2.7–3.6 V - compatible with standard automotive 3.3 V rail and low-dropout regulators |
Pinout & Package
100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (EPAD) connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDD | Power supply inputs | Dedicated analog/digital rails reduce coupling noise between sensing and logic domains |
| SDA, SCL, MOSI, MISO, SCLK, SS | I²C & SPI interface pins | Configurable as either I²C or SPI - no external multiplexer required for interface selection |
| TX0–TX7 | Transmit electrode drivers | Programmable drive strength (0.5–4 mA) adjusts for varying panel capacitance and overlay thickness |
| RX0–RX15 | Receive electrode inputs | Integrated PGA and 12-bit SAR ADC enable >80 dB SNR at 120 Hz scan rate |
| INT, RESET_N | Interrupt & reset control | Active-low open-drain INT signals host only on valid touch event, reducing polling overhead |
Key Features
| Feature | Design Value |
|---|---|
| Integrated AEC-Q100 Grade 2 qualification | Validated for automotive cockpit applications without additional system-level qualification effort |
| Programmable noise immunity | Adjustable digital filtering thresholds suppress EMI from display backlight inverters and DC-DC converters |
| Self- and mutual-capacitance modes | Enables hybrid operation: self-cap for proximity/wake-up, mutual for precise finger tracking |
| On-chip firmware update via I²C/SPI | Field-upgradable touch algorithms support evolving UI requirements without hardware change |
Applications
| Automotive Infotainment Display | Industrial HMI Panel |
|---|---|
Use Scenario: Touchscreen in vehicle center console with glove-mode operation and sunlight readability. IC Role / Device Role / Timing Role: Primary mutual-capacitance controller managing 10-finger gestures, palm rejection, and wet-finger compensation. Use Value: AEC-Q100 qualification and -40°C to +85°C operation ensure reliability across automotive thermal cycles and EMC environments. | Use Scenario: Operator interface on factory-floor PLC control cabinet exposed to oil mist and ESD events. IC Role / Device Role / Timing Role: Robust capacitive controller with programmable noise filtering and conductive stylus support. Use Value: Integrated ESD protection (±8 kV contact, ±15 kV air) eliminates need for external TVS diodes on sensor lines. |
| Medical Diagnostic Tablet | Public Kiosk Terminal |
Use Scenario: Sterile-environment tablet used for patient data entry with surgical gloves. IC Role / Device Role / Timing Role: Dual-mode controller enabling glove-mode (self-cap) wake-up followed by high-res (mutual-cap) interaction. Use Value: Configurable sensitivity thresholds maintain responsiveness through 3 mm glove thickness without false triggers. | Use Scenario: Outdoor ticketing kiosk subject to rain, dust, and vandalism. IC Role / Device Role / Timing Role: High-noise-tolerance controller with water rejection algorithm and fast recalibration. Use Value: Real-time moisture compensation maintains touch accuracy during light rain exposure without user interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MTCH6302-I/ST | 8-channel RX, no AEC-Q100 qualification, lower max scan rate (80 Hz) | Suitable for consumer tablets but not automotive-grade thermal/EMC requirements | Select when cost-sensitive non-automotive designs require smaller footprint and simpler layout |
| ATMXT224E-CCU | 22-channel RX, no integrated ARM core, requires external host for algorithm execution | Requires host MCU resources for touch processing; higher BOM and firmware integration effort | Select when existing host processor has spare cycles and design prioritizes flexibility over turnkey solution |
Compared with MTCH6302-I/ST and ATMXT224E-CCU, CYAT81688-100AA71 delivers automotive-grade reliability, higher channel count, and autonomous firmware execution-reducing host dependency and qualifying faster for Tier-1 automotive programs.
Availability
CYAT81688-100AA71 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMIs, and medical diagnostic devices requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81688-100AA71 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 microcontrollers, and sensing solutions, with global R&D and manufacturing infrastructure.
This part belongs to the TrueTouch family of capacitive touchscreen controllers, designed specifically for robust, high-channel-count touch sensing in safety-critical and thermally demanding environments.
FAQ
What is the maximum supported sensor matrix size for CYAT81688-100AA71?
The device supports up to 16 receive and 8 transmit electrodes, enabling a 16×8 (128-node) mutual-capacitance matrix. Layout flexibility allows asymmetric configurations such as 12×10 or 14×9, constrained only by total channel count and routing density on the flex PCB.
Does CYAT81688-100AA71 require external memory for firmware storage?
No. The device integrates 256 KB flash and 32 KB SRAM for firmware and runtime variables. Boot code resides in ROM, and field updates are performed in-system via I²C or SPI without external memory components.
How is ESD protection implemented on the RX/TX lines?
Each RX and TX pin includes integrated 8 kV contact / 15 kV air IEC 61000-4-2 ESD protection. No external TVS diodes are required for basic compliance; layout guidelines recommend 0.1 µF local decoupling and controlled impedance traces to maintain protection integrity.
Can CYAT81688-100AA71 operate in both self-capacitance and mutual-capacitance modes simultaneously?
No. The device operates in one mode per firmware configuration cycle, but supports rapid mode switching (sub-100 ms) under host command. Typical usage sequences self-cap for wake-up/glove detection, then switches to mutual-cap for active interaction.
CYAT81688-100AA71 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)
CYAT81688-100AA71 FAQ
1.How can I place an order for CYAT81688-100AA71 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AA71 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 CYAT81688-100AA71 reliable?
The price and inventory of CYAT81688-100AA71 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AA71 is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AA71?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AA71 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AA71?
CYAT81688-100AA71 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AA71 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 CYAT81688-100AA71?
For technical support, including CYAT81688-100AA71 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AA71 requirements.
6.How does Aetrix verify that CYAT81688-100AA71 is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AA71 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 CYAT81688-100AA71 meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AA71?
All CYAT81688-100AA71 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AA71, 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 CYAT81688-100AA71 part is unused and in its original packaging.
Return procedure for CYAT81688-100AA71:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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