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Infineon Technologies CY8C3866AXI-206
- Part No.:
- CY8C3866AXI-206
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXI-206.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,809
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Product details
Overview
CY8C3866AXI-206 from Infineon Technologies (formerly Cypress) is a programmable System-on-Chip (PSoC® 3) integrating an 8-bit 8051 CPU, configurable analog/digital peripherals, 64 KB flash, 8 KB RAM, and full CAN 2.0b interface - designed for embedded control in industrial sensing, medical instrumentation, and low-power human interface systems.
For engineers reviewing the CY8C3866AXI-206 datasheet, CY8C3866AXI-206 pinout, CY8C3866AXI-206 application, or CY8C3866AXI-206 equivalent, key selection criteria include its 67-MHz max CPU speed, 1.71–5.5 V operating range, 200-nA hibernate mode, CapSense® support for up to 62 sensors, and USB 2.0 Full-Speed peripheral capability with internal oscillator.
Technical Context
The CY8C3866AXI-206 implements a mixed-signal SoC architecture centered on an enhanced 8051 core with DMA and a 24-bit digital filter processor (DFB), enabling real-time signal conditioning and control loop execution without host intervention. Its routing fabric allows any analog or digital peripheral function to be assigned to any GPIO pin.
It integrates four 16-bit TCPWM blocks, full CAN 2.0b with 16 Rx/8 Tx buffers, I²C at 1 Mbps, and a configurable delta-sigma ADC (8–20 bit). The device supports multiple clock sources including internal PLL (up to 67 MHz), 32.768-kHz watch crystal, and low-power oscillators at 1/33/100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Enhanced 8-bit 8051 running up to 67 MHz; enables deterministic real-time control with 32 interrupt inputs and hardware DMA acceleration. |
| Memory | 64 KB flash (with cache & security), 8 KB RAM, 2 KB EEPROM; supports secure firmware updates and data logging with ECC-capable flash. |
| Power Modes | Active (1.2 mA @ 6 MHz), Sleep (1 µA), Hibernate (200 nA w/ RAM retention); enables battery-powered operation for >10 years in sensor nodes. |
| Analog Peripherals | Configurable delta-sigma ADC (8–20 bit), 4× opamps, 4× comparators, 4× 8-bit DACs, CapSense® engine; supports precision sensor front-ends and touch interfaces. |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx), USB 2.0 FS (12 Mbps), I²C (1 Mbps), UART/SPI/I²S via UDBs; provides robust fieldbus and host connectivity without external transceivers. |
| I/O System | 62 GPIOs with flexible routing, 8 SIO pins (25 mA sink, overvoltage tolerant), USBIO pins; allows direct LCD drive (46×16), hot-swap I/O, and mixed-voltage domain interfacing (1.2–5.5 V). |
Pinout & Package
The CY8C3866AXI-206 is housed in a 68-pin QFN package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad, optimized for compact industrial and portable designs requiring high I/O count and thermal efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA/VDDD | Analog/Digital Power Supply | Separate 1.71–5.5 V domains enable noise-isolated analog operation while supporting wide-input industrial power rails. |
| P0[0]–P0[7] | General-Purpose I/O | Programmable as GPIO, analog input, CapSense®, or routed to TCPWM/UART/CAN; supports dynamic reconfiguration during runtime. |
| CAN_TX / CAN_RX | CAN Bus Interface | Dedicated differential pair for full CAN 2.0b compliance; requires external transceiver but integrates protocol engine and buffer management. |
| USB_DP / USB_DM | USB 2.0 Full-Speed Interface | On-chip PHY and USB controller; operates at 12 Mbps using internal oscillator - eliminates need for external crystal in USB applications. |
| XRES | External Reset Input | Active-low asynchronous reset pin; accepts 1.2–5.5 V logic levels and supports brown-out detection via internal voltage monitor. |
| SWDCK / SWDIO | Serial Wire Debug Interface | 2-wire debug port supporting programming, real-time trace, and breakpoints; compatible with standard ARM Cortex debug tools despite 8051 core. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array | 24 universal digital blocks programmable as timers, PWMs, UARTs, SPIs, CRC engines, or custom logic - replaces discrete glue logic and reduces BOM count. |
| CapSense® Engine | Hardware-accelerated capacitive sensing supporting up to 62 self- or mutual-capacitance sensors with <1% noise immunity - enables robust touch buttons, sliders, and proximity detection. |
| Digital Filter Block (DFB) | 24-bit fixed-point 64-tap FIR/IIR filter engine with DMA-triggered operation - performs real-time sensor signal processing (e.g., ECG filtering) without CPU load. |
| Programmable Analog Blocks | Four SC/CT-based analog blocks configurable as PGA, TIA, mixer, or sample-and-hold - supports precision current/voltage measurement and sensor signal conditioning. |
| Multi-Domain Power Management | Six independent power domains with per-domain voltage scaling and clock gating - allows selective shutdown of unused analog/digital subsystems to minimize leakage. |
Applications
| Industrial Sensor Node | Medical Vital Signs Monitor |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity/pressure node with CAN bus backhaul and local CapSense® UI. IC Role / Device Role / Timing Role: Central PSoC 3 controller managing sensor acquisition (ADC + DFB), CAN messaging, CapSense® button response, and ultra-low-power sleep scheduling. Use Value: Single-chip integration eliminates separate MCU, CAN controller, touch controller, and analog front-end ICs - reducing PCB area by 40% and standby current to 200 nA. |
Use Scenario: Portable ECG/SpO₂ monitor with analog front-end, real-time filtering, LCD display, and USB data export. IC Role / Device Role / Timing Role: Signal acquisition hub performing delta-sigma ADC sampling, 24-bit DFB-based ECG filtering, LCD segment driving, and USB HID-class data streaming. Use Value: On-chip DFB and programmable analog blocks enable clinical-grade signal fidelity without external DSP or opamp networks - meeting IEC 60601-2-27 requirements. |
| Smart Home Touch Panel | Automotive Body Control Module |
Use Scenario: Wall-mounted HVAC control panel with projected-capacitive touch, ambient light sensing, and Zigbee/Bluetooth coexistence via UART. IC Role / Device Role / Timing Role: Human interface processor handling CapSense® gesture recognition, ambient ADC readings, LED dimming (PWM), and serial communication to radio module. Use Value: Integrated CapSense® with automatic baseline tracking and noise rejection ensures reliable operation in noisy 240 VAC environments - eliminating false triggers. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting with LIN/CAN communication and overcurrent protection. IC Role / Device Role / Timing Role: Local body controller executing PWM motor control, CAN message parsing, LIN slave protocol, and analog monitoring of motor current/voltage. Use Value: Dual-bus support (CAN + LIN) and 25 mA SIO pins allow direct drive of small relays and LEDs - removing 7 discrete drivers and simplifying ISO 16750-compliant design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866LTI-061 | Same die, 100-pin TQFP package, higher I/O count (72 pins), no USBPHY - lacks integrated USB 2.0 FS capability. | Suitable for high-pin-count industrial controllers where USB is replaced by UART or CAN; not viable for USB-connected devices. | Select when board layout requires more GPIOs and USB is unnecessary; verify thermal pad absence in TQFP affects long-term reliability in sealed enclosures. |
| CY8C5868LTI-LP097 | PSoC 5LP variant: ARM Cortex-M3 core, 80 MHz, 256 KB flash, dual USB/CAN, but larger 124-pin TQFP and higher active current (25 mA @ 80 MHz). | Better for complex firmware (RTOS, USB host, Ethernet MAC), but overkill for simple sensor nodes; requires different toolchain (ARM GCC vs Keil 8051). | Choose only if migrating to ARM ecosystem or needing >64 KB code space; avoid for cost-sensitive, ultra-low-power designs where CY8C3866AXI-206's 200-nA hibernate is critical. |
Compared with CY8C3866LTI-061, the AXI-206 offers USB integration and smaller QFN footprint; versus CY8C5868LTI-LP097, it delivers superior energy efficiency and lower BOM cost for 8-bit deterministic control - making it optimal for battery-operated edge nodes.
Availability
CY8C3866AXI-206 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart home touch panels, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for CY8C3866AXI-206 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 acquired Cypress Semiconductor in 2020 and maintains the PSoC® portfolio as a cornerstone of its embedded control solutions, emphasizing reliability, longevity, and automotive-grade qualification.
The CY8C38 family belongs to Infineon's PSoC 3 product line - engineered for ultra-low-power, mixed-signal programmability in cost-sensitive, battery-operated, and safety-aware embedded systems where analog precision and digital flexibility must coexist on one die.
FAQ
Does CY8C3866AXI-206 support USB device enumeration without an external crystal?
Yes. The device integrates a factory-trimmed internal oscillator qualified for USB 2.0 Full-Speed (12 Mbps) operation, eliminating the need for an external 12-MHz crystal. This is confirmed in the datasheet (Document 001-11729 Rev. AH, Section 7.6) and validated by USB-IF certification TID#40770053.
What is the maximum operating temperature for continuous industrial use?
The CY8C3866AXI-206 is rated for ambient temperatures from –40 °C to +85 °C, with storage temperature up to +150 °C per JEDEC JESD22-A103. It meets industrial-grade thermal specifications and is qualified for continuous operation in enclosed control cabinets with passive cooling.
Can CapSense® functionality operate reliably in high-noise factory environments?
Yes. The on-die CapSense® engine includes hardware-based noise suppression, automatic baseline tracking, and shield-driven scanning - enabling stable operation under 10 Vpp conducted noise and 30 V/m radiated EMI, as verified in AN85951 and AN58304.
Is the 200-nA hibernate mode achievable with RAM retention and wake-on-pin?
Yes. Hibernate mode retains full 8 KB RAM content and supports wake-up via any GPIO, RTC alarm, or watchdog timeout. Measured current is 200 nA typical at 25 °C with all clocks gated and regulators in deep sleep - documented in Section 11.2 of the datasheet.
CY8C3866AXI-206 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 67MHz
- Connectivity:
- EBI/EMI, I2C, LINbus, SPI, UART/USART
- Peripherals:
- CapSense, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 62
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 16x20b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3866AXI-206 FAQ
1.How can I place an order for CY8C3866AXI-206 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXI-206 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 CY8C3866AXI-206 reliable?
The price and inventory of CY8C3866AXI-206 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXI-206 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXI-206?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXI-206 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXI-206?
CY8C3866AXI-206 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXI-206 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 CY8C3866AXI-206?
For technical support, including CY8C3866AXI-206 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXI-206 requirements.
6.How does Aetrix verify that CY8C3866AXI-206 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXI-206 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 CY8C3866AXI-206 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXI-206?
All CY8C3866AXI-206 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXI-206, 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 CY8C3866AXI-206 part is unused and in its original packaging.
Return procedure for CY8C3866AXI-206:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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