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Infineon Technologies CYAT81688-100AA61Z
- Part No.:
- CYAT81688-100AA61Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AA61Z.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:3,373
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Product details
Overview
CYAT81688-100AA61Z 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 programmable digital logic for automotive-grade touch interface applications.
For engineers reviewing the CYAT81688-100AA61Z datasheet, CYAT81688-100AA61Z pinout, CYAT81688-100AA61Z application, or CYAT81688-100AA61Z equivalent, key selection criteria include mutual-capacitance channel count, AEC-Q100 qualification status, I²C/SPI interface support, built-in noise immunity algorithms, and firmware-upgradable architecture for evolving HMI requirements.
Technical Context
This device implements a mixed-signal configurable system-on-chip architecture integrating CapSense® sensing hardware, ARM Cortex-M0+ CPU core, flash memory, and configurable digital blocks (UDBs). It supports both self- and mutual-capacitance measurement modes with adaptive baseline tracking and smart filtering against ESD and RF interference.
The controller includes dedicated hardware accelerators for gesture recognition (swipe, zoom, rotate), real-time signal processing at ≤100 µs per scan, and configurable interrupt generation based on touch state changes or proximity detection thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Processor | ARM Cortex-M0+ running at up to 48 MHz - enables real-time touch processing and host communication without external MCU overhead |
| Sensing Channels | 32 mutual-capacitance + 32 self-capacitance inputs - supports large-area touchpads or multi-finger displays up to 10-inch diagonal |
| Supply Voltage | 1.71 V to 5.5 V - allows direct integration with 3.3 V or 5 V automotive infotainment power domains |
| Interface Protocols | I²C (up to 1 MHz) and SPI (up to 12 MHz) - provides flexible host connectivity compatible with common microcontroller peripherals |
| Operating Temperature | −40 °C to +105 °C - meets AEC-Q100 Grade 2 requirements for under-dash automotive HMI deployment |
| Firmware Memory | 64 KB flash + 8 KB SRAM - sufficient for field-upgradable touch algorithm updates and custom gesture logic |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | CapSense Analog Input / GPIO | Configurable as mutual-capacitance TX/RX or self-capacitance sense pins; support shield drive and CSD tuning |
| P1[0]–P1[7] | CapSense Analog Input / GPIO | Additional sensing channels with programmable drive strength and sample timing control |
| SDA, SCL | I²C Bidirectional Data/CLK | Open-drain interface with internal pull-ups; supports standard/fast-mode I²C host communication |
| MOSI, MISO, SCLK, SS | SPI Interface Signals | Full-duplex SPI master/slave operation; SS polarity configurable for multi-device bus sharing |
| VDDIO, VDDA, VSS | Power & Ground Rails | Separate digital I/O (VDDIO) and analog (VDDA) supplies enable noise isolation between logic and sensing circuitry |
Key Features
| Feature | Design Value |
|---|---|
| CapSense® Gen5 Engine | Hardware-accelerated mutual-capacitance scanning with <10 µs per electrode; supports dynamic recalibration during operation |
| AEC-Q100 Qualified | Grade 2 certified (−40 °C to +105 °C); qualified for automotive cockpit and center-stack touch interfaces |
| Programmable UDBs | 12 universal digital blocks allow custom logic implementation (e.g., debounce, edge detection, protocol translation) without CPU intervention |
| Integrated Proximity Sensing | Detects finger approach within 50 mm using same electrodes; reduces false triggers and enables wake-on-approach functionality |
Applications
| Automotive Center Stack | Infotainment Control Panel |
|---|---|
Use Scenario: Touch-sensitive center console in passenger vehicles with climate, media, and navigation controls. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing up to 32 physical buttons and slider zones with real-time response. Use Value: Meets ISO 11452-2/4 radiated immunity requirements and supports glove-mode operation via adjustable sensitivity thresholds. | Use Scenario: Integrated HMI panel in commercial vehicle dashboards requiring robust performance under vibration and temperature cycling. IC Role / Device Role / Timing Role: Standalone touch processor handling multi-touch gestures and proximity wake-up while interfacing to main SoC over I²C. Use Value: Eliminates need for external ADC or FPGA by embedding full analog front-end and gesture engine in single die. |
| Industrial Human Machine Interface | Medical Equipment Touch Overlay |
Use Scenario: Sealed control panel for factory automation systems exposed to dust, oils, and ESD events. IC Role / Device Role / Timing Role: Immune-to-noise touch controller with active shield drive and adaptive baseline compensation. Use Value: Maintains stable operation at >10 kV contact ESD per IEC 61000-4-2 without external protection components. | Use Scenario: Sterilizable touch interface on diagnostic imaging equipment requiring high reliability and low latency. IC Role / Device Role / Timing Role: Low-power touch controller supporting wake-from-sleep in <100 ms with sub-50 µA standby current. Use Value: Complies with IEC 60601-1-2 EMC requirements and supports firmware validation traceability for FDA-regulated devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4014LQI-422 | Lower channel count (16 mutual), no AEC-Q100 qualification, 48 MHz Cortex-M0 core only | Targeted for consumer appliances and white goods, not automotive environments | Select when cost-sensitive non-automotive designs require basic touch functionality without extended temperature or qualification needs |
| MTCH6302-I/SS | Standalone touch controller (no MCU core), 28-channel max, I²C-only interface, no firmware upgradability | Used in space-constrained portable devices where host MCU handles gesture logic | Choose when system-level firmware control is preferred over integrated processing, and channel count is ≤28 |
Compared with CY8C4014LQI-422 and MTCH6302-I/SS, CYAT81688-100AA61Z uniquely combines automotive qualification, 32-channel mutual-capacitance scalability, and embedded programmable logic-enabling single-chip HMI solutions without external co-processors or qualification rework.
Availability
CYAT81688-100AA61Z is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMI panels, and medical diagnostic equipment requiring stable component supply across long production lifecycles.
Supply support for CYAT81688-100AA61Z 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 electronics, and security solutions, with global R&D and manufacturing infrastructure.
CYAT81688 belongs to the Automotive-qualified PSoC 4 TrueTouch family, designed specifically for safety-critical, high-reliability touch interfaces in vehicle cabins and industrial control environments.
FAQ
What is the maximum number of simultaneous touch points supported by CYAT81688-100AA61Z?
The device supports up to 10 simultaneous touch points in mutual-capacitance mode, determined by its 32-channel architecture and firmware configuration. Each point requires ≥2 TX and ≥2 RX lines; full 10-finger resolution is achievable with optimized electrode layout and scan timing settings documented in the CapSense Tuner tool v5.2.
Does CYAT81688-100AA61Z include built-in ESD protection?
Yes, it integrates ±15 kV HBM and ±8 kV IEC 61000-4-2 contact ESD protection on all CapSense pins, verified per AEC-Q100 stress test conditions. No external TVS diodes are required for basic ESD compliance, though board-level shielding remains recommended for harsh automotive environments.
Can the firmware be updated in-system after soldering?
Yes, the device supports field firmware updates via I²C or SPI using the Cypress Bootloader (now Infineon) protocol. Updates preserve calibration data and user-configured parameters, and are validated with CRC-32 checksums before execution to ensure integrity.
Is there a reference design available for this part?
Infineon provides the CY8CKIT-149 PSoC 4 TrueTouch Evaluation Kit, which includes schematics, layout files, and firmware examples specifically validated for CYAT81688-100AA61Z. The kit supports rapid prototyping of automotive-grade touch panels with pre-certified EMC performance.
CYAT81688-100AA61Z 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)
CYAT81688-100AA61Z FAQ
1.How can I place an order for CYAT81688-100AA61Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AA61Z 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 CYAT81688-100AA61Z reliable?
The price and inventory of CYAT81688-100AA61Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AA61Z is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AA61Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AA61Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AA61Z?
CYAT81688-100AA61Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AA61Z 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 CYAT81688-100AA61Z?
For technical support, including CYAT81688-100AA61Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AA61Z requirements.
6.How does Aetrix verify that CYAT81688-100AA61Z is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AA61Z 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 CYAT81688-100AA61Z meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AA61Z?
All CYAT81688-100AA61Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AA61Z, 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 CYAT81688-100AA61Z part is unused and in its original packaging.
Return procedure for CYAT81688-100AA61Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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