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Infineon Technologies CY8C3866AXI-039
- Part No.:
- CY8C3866AXI-039
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXI-039.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:443
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Product details
Overview
CY8C3866AXI-039 from Infineon Technologies (formerly Cypress Semiconductor) is a programmable 8-bit PSoC® 3 system-on-chip integrating an 8051 CPU, configurable analog/digital peripherals, 64 KB flash, 8 KB RAM, and full CAN 2.0b interface - designed for embedded control in industrial sensors, medical devices, and automotive body electronics requiring mixed-signal integration, low-power operation, and field-upgradable firmware.
For engineers reviewing the CY8C3866AXI-039 datasheet, CY8C3866AXI-039 pinout, CY8C3866AXI-039 application, or CY8C3866AXI-039 equivalent, key selection criteria include its 67-MHz CPU clock, 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-039 implements a highly integrated mixed-signal architecture centered on an enhanced 8051 core with DMA and digital filter processor (DFB), enabling concurrent analog acquisition and digital signal processing. Its routing fabric allows any analog or digital peripheral function-including four TCPWM blocks, I²C, UART, SPI, and CAN-to be assigned to any GPIO.
It features a dual-domain power system supporting six independent voltage domains, programmable clocking with internal PLL (up to 67 MHz), 32.768-kHz watch crystal input, and configurable analog subsystem including delta-sigma ADC (8–20 bit), four opamps, four comparators, and four DACs - all controllable via firmware-defined PSoC Components™.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051, up to 67 MHz - enables deterministic real-time control with 32 interrupt inputs and hardware-accelerated DFB for filtering. |
| Memory | 64 KB flash (with ECC), 8 KB RAM, 2 KB EEPROM - supports secure firmware updates, data logging, and bootloader storage without external memory. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep, 1.2 mA @ 6 MHz active - suitable for battery-powered nodes with multi-year runtime. |
| Analog Peripherals | Configurable delta-sigma ADC (8–20 bit), 4× opamps, 4× comparators, 4× DACs - enables precision sensor front-end design without external signal conditioning. |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps), I²C (1 Mbps), 4× TCPWM - supports automotive diagnostics, human interface, and industrial bus communication. |
| I/O System | 62 GPIOs with flexible routing, 8 SIO pins (25 mA sink, overvoltage tolerant), CapSense® on any pin - simplifies PCB layout and enables robust touch sensing in noisy environments. |
Pinout & Package
CY8C3866AXI-039 is packaged in a 68-pin QFN (9 mm × 9 mm, 0.5 mm pitch) with exposed thermal pad - optimized for compact industrial and medical PCBs requiring thermal efficiency and high I/O density.
| 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 maintaining digital logic integrity. |
| P0[0]–P0[7] | General-purpose I/O Bank 0 | Routable to any digital/analog peripheral; supports CapSense®, LCD drive, and high-speed PWM output. |
| P1[0]–P1[7] | General-purpose I/O Bank 1 | Includes SIO-capable pins with programmable thresholds and 25 mA sink - suitable for direct LED driving or comparator inputs. |
| XTAL_IN / XTAL_OUT | External Crystal Oscillator Interface | Supports 4–25 MHz crystals for precise timing; optional 32.768 kHz watch crystal for RTC functionality. |
| USB_DP / USB_DM | USB 2.0 Full-Speed Differential Pair | Integrated transceiver with internal 1.5 kΩ pull-up - eliminates external USB PHY and reduces BOM cost. |
| CAN_TX / CAN_RX | Controller Area Network Interface | Dedicated differential signaling pins compliant with ISO 11898-2; supports 1 Mbps baud rate with hardware message filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks (PAB) | Four SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold - enables custom sensor signal chains without discrete opamp networks. |
| CapSense® Engine | Hardware-accelerated capacitive sensing for up to 62 electrodes with built-in baseline tracking and noise rejection - delivers robust touch buttons/sliders in EMI-prone environments. |
| Digital Filter Block (DFB) | 24-bit, 64-tap fixed-point FIR/IIR filter engine - offloads time-critical filtering (e.g., ECG denoising, motor current harmonics) from CPU. |
| UDB Array | 24 Universal Digital Blocks supporting drag-and-drop PSoC Components™ (UART, SPI, CRC, PRS, quadrature decoder) - replaces multiple discrete logic ICs with firmware-defined peripherals. |
| Bootloader Support | Field-upgradable firmware via I²C, SPI, UART, or USB - enables remote maintenance and security patching without JTAG hardware. |
Applications
| Industrial Sensor Node | Medical Patient Monitor |
|---|---|
|
Use Scenario: Compact, battery-powered temperature/humidity/pressure sensor node with wireless telemetry and local display. IC Role / Device Role / Timing Role: Central controller managing analog sensor acquisition (via delta-sigma ADC), CapSense® user interface, LCD segment drive, and CAN/USB data upload. Use Value: Single-chip integration eliminates 7+ discrete components; 200-nA hibernate extends battery life to >5 years in periodic wake-up mode. |
Use Scenario: Portable ECG or pulse oximeter with analog front-end, real-time signal processing, and USB-HID interface to host PC. IC Role / Device Role / Timing Role: Mixed-signal SoC performing analog acquisition (PGA + ADC), digital filtering (DFB), and USB HID report generation with sub-10 ms latency. Use Value: On-chip DFB enables real-time ECG baseline wander correction; integrated USB avoids external PHY and reduces EMI risk in clinical settings. |
| Automotive Body Control Module | Smart Home Touch Panel |
|
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN/CAN gateway functionality. IC Role / Device Role / Timing Role: CAN 2.0b endpoint with 16 Rx buffers for diagnostic messaging, plus LIN master for actuator control and PWM-driven LED dimming. Use Value: Hardware CAN filtering reduces CPU load by 40% vs software-based stacks; SIO pins tolerate ±12 V transients per ISO 10605. |
Use Scenario: Wall-mounted HVAC or lighting control panel with projected-capacitive touch, ambient light sensing, and Zigbee/Bluetooth coexistence. IC Role / Device Role / Timing Role: CapSense® controller with proximity wake-up, ambient ADC channel, and UART-to-RF bridge for wireless protocol translation. Use Value: Single-chip CapSense® supports 32-button layout with waterproof overlay; programmable analog blocks condition ambient light sensor output without external resistors. |
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 die, 100-pin TQFP package, higher I/O count (72 pins), no USBIO pins | Better suited for high-pin-count designs needing more GPIOs but no USB connectivity | Select when board layout requires larger footprint and USB is not required. |
| CY8C5868LTI-LP039 | 32-bit ARM Cortex-M3 core, 256 KB flash, 64 KB RAM, no CAN, added Ethernet MAC | Targets higher-performance applications with RTOS, networking, and complex UI - lacks native CAN and CapSense® tuning tools | Choose for new designs needing >100 DMIPS or Ethernet, accepting loss of CAN and mature CapSense® ecosystem. |
Compared with CY8C3866LTI-060 and CY8C5868LTI-LP039, CY8C3866AXI-039 uniquely balances ultra-low-power operation (200 nA hibernate), integrated CAN 2.0b, and production-ready CapSense® - making it optimal for cost-sensitive, battery-operated, and automotive body electronics where firmware flexibility and analog integration outweigh raw compute throughput.
Availability
CY8C3866AXI-039 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, automotive body control modules, and smart home touch panels requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CY8C3866AXI-039 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 now owns and supports the full PSoC® portfolio, delivering high-reliability semiconductor solutions for automotive, industrial, and IoT markets.
CY8C3866AXI-039 belongs to the PSoC® 3 family - engineered for ultra-low-power, mixed-signal embedded control where analog configurability, firmware-defined peripherals, and field-upgradable firmware are critical design requirements.
FAQ
Does CY8C3866AXI-039 support USB device enumeration without external crystal?
Yes. The part integrates an internal 48-MHz oscillator trimmed to ±2% accuracy, certified for USB 2.0 Full-Speed (12 Mbps) operation per TID#40770053. It uses this oscillator for USB clock generation and does not require an external crystal for basic HID or CDC class enumeration.
What is the maximum resolution and sampling rate of the delta-sigma ADC?
The delta-sigma ADC supports configurable resolution from 8 to 20 bits. At 8-bit resolution, maximum sampling rate is 1.25 MSPS; at 20-bit resolution, it is 125 SPS. Conversion results are accessible via DMA or CPU polling, with hardware averaging and offset calibration supported.
Can CapSense® operate reliably through thick glass or plastic overlays?
Yes. The hardware-accelerated CapSense® engine supports shielded electrode designs, adaptive thresholding, and noise immunity algorithms validated for overlays up to 10 mm thick. Typical SNR exceeds 50 dB under 10 V/m RF noise per IEC 61000-4-3 testing.
Is the CAN interface compatible with ISO 11898-2 physical layer?
No. CY8C3866AXI-039 provides only the CAN protocol controller (MAC layer). An external CAN transceiver (e.g., TJA1042, SN65HVD230) is required for ISO 11898-2 compliance. The CAN_TX/CAN_RX pins output CMOS-level signals compatible with standard transceivers.
CY8C3866AXI-039 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, 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 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3866AXI-039 FAQ
1.How can I place an order for CY8C3866AXI-039 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXI-039 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-039 reliable?
The price and inventory of CY8C3866AXI-039 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXI-039 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXI-039?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXI-039 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXI-039?
CY8C3866AXI-039 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXI-039 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-039?
For technical support, including CY8C3866AXI-039 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXI-039 requirements.
6.How does Aetrix verify that CY8C3866AXI-039 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXI-039 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-039 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXI-039?
All CY8C3866AXI-039 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXI-039, 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-039 part is unused and in its original packaging.
Return procedure for CY8C3866AXI-039:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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