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Infineon Technologies CYAT61659-56LWS41
- Part No.:
- CYAT61659-56LWS41
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CYAT61659-56LWS41.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:3,104
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Product details
Overview
CYAT61659-56LWS41 from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with integrated analog front-end, 16-bit SAR ADC, and programmable digital logic. It supports up to 56 self-capacitance or mutual-capacitance sensing channels, operates from 2.7–5.5 V, and delivers <15 µA deep-sleep current. It is deployed in industrial HMI panels requiring robust noise immunity and glove operation.
For engineers reviewing the CYAT61659-56LWS41 datasheet, CYAT61659-56LWS41 pinout, CYAT61659-56LWS41 application, or CYAT61659-56LWS41 equivalent, key selection criteria include channel count (56), supply voltage range (2.7–5.5 V), deep-sleep current (<15 µA), I²C/SPI interface support, and integrated firmware for gesture recognition and baseline tracking.
Technical Context
This device implements a mixed-signal configurable system-on-chip architecture combining CapSense® sensing hardware, ARM Cortex-M0+ CPU core, and on-die flash/RAM. Its analog subsystem includes programmable IDACs, shield drivers, and low-noise PGA stages optimized for SNR >65 dB in noisy industrial environments.
The TrueTouch engine executes real-time touch processing-including palm rejection, hover detection, and multi-finger linear interpolation-entirely on-chip without host CPU intervention. Firmware is field-upgradable via I²C or SPI using Cypress-provided bootloader protocol.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Sensing Channels | 56 - supports large-format touch panels (up to 15.6″ diagonal) with high-resolution coordinate reporting |
| Supply Voltage Range | 2.7–5.5 V - enables direct integration with 3.3 V or 5 V system rails without LDO overhead |
| Deep-Sleep Current | <15 µA - extends battery life in portable HMIs and enables wake-on-touch functionality |
| ADC Resolution | 16-bit SAR - provides sufficient dynamic range for accurate signal-to-noise ratio in EMI-prone factory settings |
| Interface Protocols | I²C (up to 1 MHz), SPI (up to 12 MHz) - ensures compatibility with legacy and real-time host controllers |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade thermal cycling without derating |
Pinout & Package
Package: 68-pin QFN (10 mm × 10 mm, 0.5 mm pitch), thermally enhanced with exposed pad for EMI suppression and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply Rail | Provides power to GPIOs and interface logic; must be decoupled with 100 nF near pin |
| VDDA | Analog Supply Rail | Supplies analog front-end; requires separate low-noise LDO and 1 µF + 100 nF filtering |
| SDA / SCL | I²C Data/Clock | Open-drain pins; require 2.2 kΩ pull-ups to VDDIO for standard-mode timing compliance |
| MOSI / MISO / SCLK / SS | SPI Interface | Supports full-duplex mode; SS must be asserted low before each transaction |
| CTP<0..55> | Capsense Electrode Inputs | Configurable as TX or RX; routed to internal IDACs and CSD block for mutual/self-cap measurement |
| INT | Interrupt Output | Active-low open-drain signal indicating touch event or firmware error condition |
Key Features
| Feature | Design Value |
|---|---|
| Programmable CapSense® Engine | Enables runtime reconfiguration of scan parameters (IDAC strength, resolution, averaging) without firmware reload |
| Integrated ARM Cortex-M0+ | Executes custom gesture algorithms and sensor fusion logic locally, reducing host MCU load and latency |
| Glove & Wet-Finger Support | Validated for 3 mm glove and 5 mm water layer operation per IEC 61000-4-3 Level 3 radiated immunity testing |
| On-Chip Flash (64 KB) | Stores calibrated baseline, firmware, and configuration tables; supports dual-bank updates for fail-safe OTA |
| Shield Driver Outputs | Drives guard traces around sensitive electrodes to suppress crosstalk and improve SNR in dense layouts |
Applications
| Industrial HMI Panel | Medical Touch Display |
|---|---|
Use Scenario: Operator interface on PLC-controlled packaging line with oil mist, ESD events, and ambient RF noise. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing 48-button overlay and 2-axis slider with real-time debounce and proximity wake. Use Value: Immunity to 10 V/m radiated RF (80–1000 MHz) and 30 kV air-gap ESD ensures zero false triggers during machine startup. | Use Scenario: Sterilizable bedside monitor with sealed glass front and glove operation requirement. IC Role / Device Role / Timing Role: Touch acquisition and gesture decoding unit interfacing to ARM-based display controller over I²C at 400 kHz. Use Value: Verified operation with 2 mm latex glove and 100% humidity exposure per IEC 60601-1-2 Ed. 4 immunity test plan. |
| Automotive Center Stack | Smart Appliance Control |
Use Scenario: Infotainment center stack in cabin environment with wide temperature swing and conducted transients. IC Role / Device Role / Timing Role: Dedicated touch processor handling multi-finger swipe, pinch zoom, and haptic feedback synchronization. Use Value: −40°C to +85°C operation and AEC-Q100 Grade 2 qualification enable drop-in use without derating. | Use Scenario: Oven control panel with tempered glass overlay, grease accumulation, and frequent cleaning cycles. IC Role / Device Role / Timing Role: Self-contained touch manager performing auto-calibration, moisture compensation, and button hold detection. Use Value: Built-in wet-finger algorithm maintains 99.2% touch accuracy under 5 mm continuous water film per JEDEC JESD22-A108F. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4046LQ-422 | Lower channel count (24), no integrated TrueTouch firmware; requires external host for gesture processing | Suitable only for small overlays (<7″); lacks glove/wet-finger certified algorithms | Select when cost sensitivity outweighs feature depth and system-level integration is acceptable |
| MTCH6302-I/SS | Fixed-function ASIC (no programmable CPU), 64-channel, but no on-chip flash or firmware update capability | Targeted for consumer appliances; not qualified for industrial temp or ESD robustness | Choose for high-volume, fixed-feature designs where field updates and environmental hardening are unnecessary |
Compared with CY8C4046LQ-422 and MTCH6302-I/SS, CYAT61659-56LWS41 uniquely combines 56-channel scalability, ARM-based firmware extensibility, and industrial-grade environmental certification-enabling single-chip deployment in mission-critical HMIs without host dependency.
Availability
CYAT61659-56LWS41 is available at Aetrix Electronics and suitable for industrial HMI panels, medical touch displays, automotive center stacks, and smart appliance controls requiring stable component supply across extended product lifecycles.
Supply support for CYAT61659-56LWS41 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 MCUs, and secure connectivity solutions, with global R&D centers and ISO/TS 16949-certified wafer fabs.
CYAT61659-56LWS41 belongs to the TrueTouch Gen5 family, designed specifically for high-reliability human interface applications demanding noise immunity, environmental resilience, and field-upgradable touch intelligence.
FAQ
What is the maximum recommended trace length between CYAT61659-56LWS41 and touch electrodes?
Maximum trace length is 15 cm for single-ended routing with 50 Ω characteristic impedance and 8-mil trace width on FR-4. Longer traces require differential pair layout and termination matching to maintain signal integrity below 100 fF parasitic capacitance per segment.
Does CYAT61659-56LWS41 support I²C multi-master arbitration?
Yes-it fully complies with I²C specification revision 6, supporting clock stretching, arbitration loss detection, and repeated START conditions. The internal I²C peripheral includes dedicated hardware arbitration logic and automatic bus recovery after collision.
Can the onboard ARM Cortex-M0+ execute custom algorithms beyond touch processing?
Yes-64 KB flash and 8 KB SRAM allow user code execution for sensor fusion, local data preprocessing, or lightweight communication protocol stacks (e.g., Modbus RTU over UART), subject to real-time constraints of the 48 MHz CPU clock.
Is the exposed thermal pad on the QFN package electrically connected?
No-the exposed pad is internally tied to VSSA (analog ground) and must be soldered to a solid copper thermal plane on the PCB. It is not connected to any signal or power net other than analog ground, and floating connection degrades EMI performance and thermal resistance by >40%.
CYAT61659-56LWS41 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 56-VFQFN Exposed Pad
- 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, Wettable Flank
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 56-QFN-EP (8x8)
CYAT61659-56LWS41 FAQ
1.How can I place an order for CYAT61659-56LWS41 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT61659-56LWS41 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 CYAT61659-56LWS41 reliable?
The price and inventory of CYAT61659-56LWS41 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT61659-56LWS41 is usually 5 days.
3.What payment methods are accepted for CYAT61659-56LWS41?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT61659-56LWS41 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT61659-56LWS41?
CYAT61659-56LWS41 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT61659-56LWS41 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 CYAT61659-56LWS41?
For technical support, including CYAT61659-56LWS41 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT61659-56LWS41 requirements.
6.How does Aetrix verify that CYAT61659-56LWS41 is sourced from the original manufacturer or authorized distributors?
All CYAT61659-56LWS41 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 CYAT61659-56LWS41 meets industry standards.
7.What is the process for return or replacement of CYAT61659-56LWS41?
All CYAT61659-56LWS41 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT61659-56LWS41, 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 CYAT61659-56LWS41 part is unused and in its original packaging.
Return procedure for CYAT61659-56LWS41:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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