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Infineon Technologies CY8C3866AXI-208
- Part No.:
- CY8C3866AXI-208
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXI-208.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:180
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Product details
Overview
CY8C3866AXI-208 from Infineon Technologies (formerly Cypress Semiconductor) is a programmable System-on-Chip (PSoC® 3) integrating an 8-bit 8051 CPU, configurable analog and 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-208 datasheet, CY8C3866AXI-208 pinout, CY8C3866AXI-208 application, or CY8C3866AXI-208 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 100-pin TQFP package with 72 I/Os including 8 high-drive SIO pins.
Technical Context
The CY8C3866AXI-208 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 without host CPU intervention. Its routing fabric allows any analog or digital peripheral function to be assigned to any GPIO, supported by 12 programmable clock dividers and dual-domain power management.
Analog subsystem flexibility includes a configurable 8–20-bit delta-sigma ADC, four opamps, four comparators, four 8-bit DACs, and programmable SC/CT blocks for PGA, TIA, or mixer functions. Digital resources comprise four TCPWM blocks, I²C (1 Mbps), USB 2.0 Full-Speed (12 Mbps), and full CAN 2.0b with 16 Rx/8 Tx buffers - all accessible via 16–24 Universal Digital Blocks (UDBs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Enhanced 8-bit 8051 running up to 67 MHz; supports real-time deterministic control with 32 interrupt inputs. |
| Flash Memory | 64 KB program flash with cache and security features; enables firmware updates and secure boot in field-deployed devices. |
| RAM / EEPROM | 8 KB SRAM + 2 KB EEPROM; sufficient for sensor data buffering, calibration storage, and state retention across sleep cycles. |
| Power Modes | 200-nA hibernate with RAM retention; 1-µA sleep; 1.2 mA at 6 MHz active - optimized for battery-powered edge nodes. |
| Analog Peripherals | Configurable delta-sigma ADC (8–20 bit), 4× opamps, 4× comparators, 4× 8-bit DACs - supports precision front-end signal chain design. |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx), USB 2.0 FS (12 Mbps), I²C (1 Mbps), UART/SPI/I²S via UDBs - enables multi-protocol connectivity in compact systems. |
| I/O Capability | 72 I/O pins including 8 SIOs (25 mA sink, overvoltage tolerant); supports CapSense®, LCD direct drive (46×16), and flexible peripheral routing. |
Pinout & Package
Package: 100-pin Thin Quad Flat Package (TQFP), 14 mm × 14 mm, 0.5 mm pitch, RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O Power Domains | Four independent 1.2–5.5 V supply rails enabling mixed-voltage interfacing and domain-isolated I/O operation. |
| P0[0]–P7[7] | General-Purpose I/O | 72 total GPIOs; each configurable as digital/analog input/output, CapSense sensor, or LCD segment/common driver. |
| SIO0–SIO7 | Special I/O Pins | 8 high-drive pins supporting 25 mA sink, hot-swap, comparator mode, and overvoltage tolerance up to 6.5 V. |
| USB_DP / USB_DM | USB Physical Interface | Differential pair for USB 2.0 Full-Speed (12 Mbps); requires no external PHY - internal transceiver and oscillator included. |
| CAN_TX / CAN_RX | CAN Bus Interface | Dedicated differential signaling pins for full CAN 2.0b compliance; supports 1 Mbps operation with integrated protocol engine. |
| XRES | External Reset Input | Active-low asynchronous reset pin; debounced internally and compatible with pushbutton or supervisor IC assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks | Four SC/CT blocks enable user-defined PGA, TIA, mixer, or sample-and-hold circuits - eliminating discrete analog components. |
| CapSense® Integration | Hardware-accelerated capacitive touch sensing for up to 62 electrodes with noise immunity and low-power wake-on-touch capability. |
| UDB-Based Peripherals | 24 programmable UDBs allow drag-and-drop creation of custom digital logic (UART, SPI, PRS, CRC, quadrature decoder) without FPGA expertise. |
| Flexible Clocking | Multiple sources (internal 3–62 MHz oscillator ±1%, external crystal, PLL, 32.768 kHz watch crystal) routed via 12 dividers to any peripheral - simplifies timing architecture. |
| Low-Power Debug | JTAG, SWD, and SWV interfaces operate down to 1.71 V; enables in-system programming and real-time trace during ultra-low-power operation. |
Applications
| Industrial Sensor Node | Medical Patient Monitor |
|---|---|
Use Scenario: Compact, battery-operated environmental sensor node measuring temperature, humidity, and gas concentration with wireless telemetry. IC Role / Device Role / Timing Role: Central controller managing analog front-end acquisition, CAN/USB data aggregation, and low-power scheduling. Use Value: 200-nA hibernate mode extends battery life to >5 years; CapSense® enables intuitive buttonless UI; integrated CAN simplifies connection to PLC networks. | Use Scenario: Portable ECG or pulse oximeter requiring analog signal conditioning, patient isolation, and USB-HID data streaming to host PC. IC Role / Device Role / Timing Role: Mixed-signal SoC performing ADC oversampling, digital filtering (via DFB), real-time waveform display, and USB HID interface. Use Value: Configurable 20-bit delta-sigma ADC achieves <100 µV RMS noise; internal 1.024 V reference ensures stable gain calibration; USB FS eliminates external transceiver BOM cost. |
| Smart Home Control Panel | Automotive Body Controller |
Use Scenario: Wall-mounted HVAC and lighting control panel with capacitive touch buttons, LED indicators, and Zigbee/Bluetooth coexistence. IC Role / Device Role / Timing Role: Human-interface processor handling CapSense® scanning, LED PWM dimming, and serial communication to wireless module. Use Value: 62-sensor CapSense® supports multi-gesture UI; 8× SIO pins drive LEDs directly at 25 mA; flexible routing avoids PCB layer congestion. | Use Scenario: Low-cost body control module managing door locks, window lifts, mirror adjustment, and interior lighting in entry-level vehicles. IC Role / Device Role / Timing Role: CAN-enabled microcontroller executing LIN slave emulation, PWM motor control, and diagnostic reporting. Use Value: Full CAN 2.0b with 16 Rx buffers handles multiplexed vehicle bus traffic; 4× opamps condition hall-effect sensor signals; EEPROM stores seat position profiles. |
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-060 | Same PSoC 3 architecture but in 68-pin QFN; lacks USB PHY and has only 48 I/Os. | Suitable for space-constrained designs where USB is unnecessary and CAN/I²C suffices. | Select when board area is critical and full USB functionality is not required. |
| CY8C5868LTI-LP097 | PSoC 5LP (ARM Cortex-M3), 80-MHz, 256 KB flash, 64 KB RAM, no native CAN; requires external transceiver. | Better for complex firmware, floating-point math, or RTOS-based systems needing higher throughput. | Choose when migrating to 32-bit architecture and CAN can be added externally. |
Compared with CY8C3866LTI-060, the CY8C3866AXI-208 offers USB integration and 24 additional I/Os in TQFP; versus CY8C5868LTI-LP097, it provides native CAN and lower power but less processing headroom - making it optimal for deterministic, low-power, CAN-centric embedded control.
Availability
CY8C3866AXI-208 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, smart home control panels, and automotive body controllers requiring stable component supply, long-term lifecycle support, and qualified manufacturing traceability.
Supply support for CY8C3866AXI-208 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 global semiconductor leader headquartered in Munich, Germany, delivering power systems, microcontrollers, sensors, and security solutions for industrial, automotive, and IoT applications.
The CY8C38 family belongs to Infineon's PSoC® 3 programmable SoC product line, engineered for ultra-low-power, mixed-signal embedded control where analog configurability, deterministic real-time response, and minimal external components are critical.
FAQ
Does CY8C3866AXI-208 support USB device enumeration without external crystal?
Yes. The device integrates a factory-trimmed 48-MHz internal oscillator qualified for USB Full-Speed (12 Mbps) operation, meeting USB specification jitter requirements without external crystal or resonator - reducing BOM count and layout complexity.
What is the maximum operating temperature for continuous industrial use?
The CY8C3866AXI-208 is rated for ambient temperatures from –40 °C to +85 °C per JEDEC JESD22-A104. It supports continuous operation across this range with validated thermal performance in 100-pin TQFP packaging under full load and worst-case voltage conditions.
Can the delta-sigma ADC achieve 20-bit resolution in production systems?
Yes. The configurable delta-sigma ADC delivers up to 20-bit effective resolution at 125 SPS with internal reference and proper layout - verified in production test across temperature and voltage ranges, with typical ENOB ≥19.2 bits under recommended decimation settings.
Is CapSense® functionality available on all GPIO pins?
Yes. All 72 GPIOs support CapSense® electrode connections, including dedicated routing paths for shield and mutual-capacitance configurations. No external components are needed beyond series resistors for ESD protection, and firmware configuration is handled through PSoC Creator's CapSense Component.
CY8C3866AXI-208 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:
- CANbus, EBI/EMI, I2C, LINbus, SPI, UART/USART, USB
- 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-208 FAQ
1.How can I place an order for CY8C3866AXI-208 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXI-208 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-208 reliable?
The price and inventory of CY8C3866AXI-208 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXI-208 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXI-208?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXI-208 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXI-208?
CY8C3866AXI-208 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXI-208 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-208?
For technical support, including CY8C3866AXI-208 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXI-208 requirements.
6.How does Aetrix verify that CY8C3866AXI-208 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXI-208 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-208 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXI-208?
All CY8C3866AXI-208 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXI-208, 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-208 part is unused and in its original packaging.
Return procedure for CY8C3866AXI-208:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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