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Infineon Technologies CY8C3866AXI-208T
- Part No.:
- CY8C3866AXI-208T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXI-208T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CY8C3866AXI-208T from Infineon Technologies (formerly Cypress Semiconductor) 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. It operates from 1.71–5.5 V across –40 to +85 °C, supports up to 67 MHz clocking via internal PLL, and delivers ultra-low-power operation down to 200 nA in hibernate mode with RAM retention. It targets embedded control in industrial sensor nodes requiring mixed-signal integration and field-upgradable firmware.
For engineers reviewing the CY8C3866AXI-208T datasheet, CY8C3866AXI-208T pinout, CY8C3866AXI-208T application, or CY8C3866AXI-208T equivalent, key selection criteria include its 100-pin TQFP package, full CAN 2.0b support (16 Rx/8 Tx buffers), CapSense® capacitive sensing capability (up to 62 sensors), programmable analog blocks (PGA/TIA), and USB 2.0 Full-Speed peripheral interface.
Technical Context
The CY8C3866AXI-208T implements a highly flexible architecture centered on a pipelined 8051 core augmented by a 24-channel DMA controller and a dedicated 24-bit digital filter processor (DFB). Its routing fabric enables any analog or digital peripheral function-including four 16-bit TCPWM blocks, I²C, UART, SPI, LIN, and CRC-to be assigned to any of its 72 GPIOs.
Analog subsystem integration includes a configurable delta-sigma ADC (8–20-bit), four opamps, four comparators, four 8-bit DACs, and programmable SC/CT blocks for PGA, TIA, mixer, and sample-and-hold functions-all supported by a precise 1.024 V ±0.1% internal reference and CapSense® engine for touch interface design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 with 32 interrupt inputs, executing at up to 67 MHz via internal PLL-enables real-time deterministic control in resource-constrained systems. |
| Memory | 64 KB flash (with cache/security), 8 KB RAM, 2 KB EEPROM-supports secure firmware updates and data logging without external memory. |
| Digital Peripherals | Four 16-bit TCPWM blocks, full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps), I²C (1 Mbps)-enables multi-protocol connectivity in industrial gateways. |
| Analog Subsystem | Configurable delta-sigma ADC (8–20-bit), four opamps, four comparators, four 8-bit DACs, CapSense® engine (62 sensors)-allows high-precision sensor signal conditioning and touch UI in one chip. |
| Power Management | Active mode: 1.2 mA @ 6 MHz; Sleep: 1 µA; Hibernate: 200 nA with RAM retention-extends battery life in remote monitoring devices. |
| Package & I/O | 100-pin TQFP, 72 GPIOs (including 8 SIO pins with 25 mA sink, overvoltage tolerance, hot-swap)-supports robust industrial interfacing and flexible board layout. |
| Clock System | Internal oscillators (3–62 MHz ±1%, 33/100 kHz low-power), 4–25 MHz crystal input, 32.768 kHz watch crystal, 12 routable dividers-provides precise timing for RTC, communication, and sampling tasks. |
Pinout & Package
The CY8C3866AXI-208T is housed in a 100-pin Thin Quad Flat Package (TQFP) with 0.5 mm pitch, RoHS-compliant, and rated for industrial temperature range (–40 to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Multiple VDD/VSS pairs enable noise isolation between analog/digital domains and support multi-power-domain operation (up to six domains). |
| P0[0]–P0[7], P1[0]–P1[7], etc. | General-purpose I/O (GPIO) | All 72 GPIOs support configurable drive strength, slew rate, pull-up/down, and analog/digital routing-enabling pin-multiplexed system integration. |
| SIO0–SIO7 | Special I/O (SIO) | Eight high-drive pins (25 mA sink), overvoltage tolerant (up to 6.5 V), hot-swap capable-suitable for direct connection to industrial sensors and actuators. |
| USB_DP / USB_DM | USB 2.0 Full-Speed differential pair | Integrated transceiver with internal 1.5 kΩ pull-up resistor-eliminates external USB PHY and reduces BOM cost for embedded USB device applications. |
| CAN_TX / CAN_RX | Controller Area Network interface | Dedicated full CAN 2.0b physical layer pins supporting 1 Mbps operation-enables direct connection to automotive/industrial CAN bus without external transceiver logic. |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up-ensures reliable power-on and fault recovery in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks (SC/CT) | Four configurable blocks enabling PGA, TIA, mixer, and sample-and-hold-replaces discrete opamp networks and reduces analog signal chain component count. |
| CapSense® Engine | Hardware-accelerated capacitive sensing for up to 62 electrodes with built-in IDACs and noise immunity-enables robust touch buttons, sliders, and proximity detection without host CPU overhead. |
| Digital Filter Block (DFB) | 24-bit fixed-point, 64-tap FIR/IIR filter engine-performs real-time sensor signal processing (e.g., vibration analysis, ECG filtering) independent of CPU. |
| Universal Digital Blocks (UDB) | 24 UDBs programmable as timers, counters, PWMs, UARTs, SPIs, LIN, PRS, CRC, or custom logic-replaces multiple discrete digital ICs with field-reconfigurable logic. |
| Flexible Clocking | 12 independent clock dividers routed to any peripheral-I/O-enables synchronous multi-rate operation (e.g., 1 MHz ADC sampling + 48 MHz CPU + 12 MHz USB). |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Remote environmental monitoring unit with temperature, humidity, and vibration sensors, transmitting data via CAN bus to central controller. IC Role / Device Role / Timing Role: Central PSoC 3 controller performing sensor signal acquisition (ADC + PGA), CAN message framing/transmission, and low-power state management. Use Value: Single-chip integration eliminates external ADC, CAN transceiver, and microcontroller-reducing PCB area by >35% and enabling 10-year battery life via 200 nA hibernate mode. | Use Scenario: Door module managing window lift, mirror adjustment, and interior lighting using local CAN communication and capacitive touch controls. IC Role / Device Role / Timing Role: Mixed-signal controller handling analog window motor current sensing, CapSense® touch inputs, and CAN 2.0b messaging to body domain controller. Use Value: Integrated opamps and comparators condition motor feedback signals; CapSense® replaces mechanical switches-improving reliability and reducing assembly cost. |
| Medical Patient Monitor Front-End | Smart Home Hub Interface Controller |
Use Scenario: Portable vital sign monitor acquiring ECG, SpO₂, and respiration signals, with USB-based firmware update and data export. IC Role / Device Role / Timing Role: Signal acquisition hub using delta-sigma ADC, DFB for real-time ECG filtering, USB FS for host communication, and secure flash for FDA-compliant firmware storage. Use Value: 20-bit ADC resolution and hardware DFB enable clinical-grade signal fidelity; integrated USB eliminates external PHY-accelerating regulatory certification. | Use Scenario: Central hub coordinating Zigbee, BLE, and Wi-Fi peripherals while providing capacitive touch UI and local sensor fusion (temperature, motion, ambient light). IC Role / Device Role / Timing Role: Peripheral interface manager routing I²C/SPI to wireless modules, running CapSense® for UI, and fusing sensor data via UDB-based logic. Use Value: Configurable UDBs implement custom sensor fusion algorithms offloading host MCU; 72 GPIOs support simultaneous multi-protocol peripheral attachment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C5868AXI-LP039 | 32-bit ARM Cortex-M3 core, higher performance (80 MHz), larger memory (256 KB flash/64 KB RAM), but no native CAN 2.0b-requires external CAN controller. | Better suited for complex firmware stacks (RTOS, protocol stacks); less optimal for CAN-centric designs due to added external components. | Select when migrating to higher-performance firmware or adding Ethernet/Wi-Fi stacks; avoid if CAN integration simplicity is critical. |
| STM32F072RB | ARM Cortex-M0 core, 64 KB flash/8 KB RAM, integrated CAN 2.0b, but lacks programmable analog blocks, CapSense®, and DFB-requires external signal conditioning. | Lower BOM cost for basic CAN nodes, but cannot replace analog front-end functions without additional ICs. | Select for cost-sensitive, digital-only CAN applications where analog integration is handled externally. |
Compared with CY8C3866AXI-208T, CY8C5868AXI-LP039 offers greater compute headroom but increases system complexity for CAN use cases, while STM32F072RB reduces silicon cost yet requires discrete analog components-making CY8C3866AXI-208T uniquely balanced for mixed-signal, CAN-enabled embedded control.
Availability
CY8C3866AXI-208T is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body electronics, medical patient monitors, and smart home hubs requiring stable component supply, long-term lifecycle support, and qualified industrial-temperature operation.
Supply support for CY8C3866AXI-208T 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, specializing in power management, automotive, industrial, and security solutions-with broad portfolio coverage from discrete devices to complex SoCs.
The CY8C38 family belongs to Infineon's PSoC® 3 programmable SoC product line, designed specifically for ultra-low-power, mixed-signal embedded control applications requiring high integration density, field reconfigurability, and rapid prototyping via schematic-driven development.
FAQ
What debug interfaces does CY8C3866AXI-208T support?
The device supports JTAG (4-wire), Serial Wire Debug (SWD, 2-wire), and Single Wire Viewer (SWV) interfaces. All are accessible via standard 10-pin ARM Cortex debug connectors and fully integrated with PSoC Creator IDE for real-time firmware debugging, trace, and memory inspection without requiring external debug probes beyond MiniProg3 or KitProg.
Does CY8C3866AXI-208T include a hardware USB transceiver?
Yes-it integrates a full-speed USB 2.0 peripheral transceiver compliant with TID#40770053, including internal termination resistors and a 1.5 kΩ pull-up on USB_DP. No external PHY or resistors are required for basic USB device functionality, though external ESD protection is recommended per USB specification.
Can the delta-sigma ADC operate simultaneously with the DFB?
Yes-the ADC and Digital Filter Block (DFB) operate independently and concurrently. The DFB can directly consume ADC output samples via DMA, enabling real-time filtering (e.g., notch or low-pass) without CPU intervention. This is confirmed in Section 7.9 and 11.5 of the datasheet, with timing verified for continuous 16-bit sampling at ≥100 kSPS.
Is CapSense® supported on all GPIOs?
Yes-CapSense® functionality is available on any of the 72 GPIOs, with dedicated hardware scan engine, IDACs, and shield drivers. Pin assignment is fully configurable in PSoC Creator, and performance (SNR, water tolerance) is maintained across all supported pins when layout guidelines (e.g., guard rings, trace spacing) are followed per AN85951.
CY8C3866AXI-208T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tape & Reel (TR)
- 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-208T FAQ
1.How can I place an order for CY8C3866AXI-208T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXI-208T 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-208T reliable?
The price and inventory of CY8C3866AXI-208T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXI-208T is usually 5 days.
3.What payment methods are accepted for CY8C3866AXI-208T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXI-208T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXI-208T?
CY8C3866AXI-208T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXI-208T 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-208T?
For technical support, including CY8C3866AXI-208T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXI-208T requirements.
6.How does Aetrix verify that CY8C3866AXI-208T is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXI-208T 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-208T meets industry standards.
7.What is the process for return or replacement of CY8C3866AXI-208T?
All CY8C3866AXI-208T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXI-208T, 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-208T part is unused and in its original packaging.
Return procedure for CY8C3866AXI-208T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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