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Infineon Technologies CY8C3866AXI-035T
- Part No.:
- CY8C3866AXI-035T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXI-035T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,181
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Product details
Overview
CY8C3866AXI-035T 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, up to 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 67-MHz max clocking via internal PLL, and delivers ultra-low-power operation down to 200 nA in hibernate mode with RAM retention. Used in industrial sensor nodes requiring mixed-signal processing, real-time control, and fieldbus connectivity.
For engineers reviewing the CY8C3866AXI-035T datasheet, CY8C3866AXI-035T pinout, CY8C3866AXI-035T application, or CY8C3866AXI-035T equivalent, key selection criteria include its integrated CAN 2.0b controller with 16 Rx/8 Tx buffers, CapSense® support for up to 62 sensors, programmable analog blocks (PGA/TIA), and flexible routing of any peripheral to any GPIO - critical for rapid prototyping and BOM consolidation in embedded control systems.
Technical Context
The CY8C3866AXI-035T implements a scalable PSoC 3 architecture centered on an enhanced 8051 core with DMA and a 24-bit digital filter processor (DFB). Its digital subsystem uses Universal Digital Blocks (UDBs) and dedicated TCPWM/CAN/USB blocks, enabling hardware-level customization without FPGA complexity.
Analog functionality is delivered through reconfigurable SC/CT blocks, delta-sigma ADC (8–20-bit), four opamps, comparators, and DACs - all routable to 62 GPIOs. Clocking includes multiple oscillators (internal 3–62 MHz ±1%, external crystal, PLL, low-power 33 kHz) with 12 dividers distributed to peripherals.
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. |
| Memory | 64 KB flash (with ECC support), 8 KB RAM, 2 KB EEPROM; sufficient for firmware + configuration storage in standalone edge nodes. |
| Power Modes | 200 nA hibernate (RAM retained), 1 µA sleep, 12 mA active at 48 MHz; supports battery-powered operation >10 years in duty-cycled sensing. |
| CAN Interface | Full CAN 2.0b compliant with 16 Rx and 8 Tx message buffers; eliminates need for external CAN transceiver in basic implementations. |
| Analog Peripherals | Configurable delta-sigma ADC (up to 20-bit), 4 opamps, 4 comparators, 4 DACs, PGA/TIA blocks; supports precision sensor signal conditioning. |
| I/O Flexibility | 62 GPIOs with full peripheral-to-pin routing, CapSense® on any pin, LCD direct drive (46×16), and SIO pins tolerant to 5.5 V. |
| Development Support | Free PSoC Creator IDE with drag-and-drop components, Keil 8051 compiler, JTAG/SWD debug, and bootloader over USB/I2C/UART. |
Pinout & Package
Package: 68-pin QFN (9 mm × 9 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced for industrial ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA, VDDD | Analog/Digital Power Supply | Independent 1.71–5.5 V domains enable noise isolation between analog and digital sections. |
| VSSA, VSSD | Analog/Digital Ground | Separate ground planes reduce coupling; mandatory split layout per design guidelines. |
| P0[0]–P0[7] | General-purpose I/O | Routable to any digital/analog peripheral; support CapSense®, LCD segment, or UART TX/RX. |
| P1[0]–P1[7] | Performance I/O (SIO) | 25 mA sink capability, overvoltage-tolerant (up to 5.5 V), usable as comparator inputs or hot-swap interfaces. |
| CAN_TX, CAN_RX | Dedicated CAN Bus Interface | Direct connection to external CAN transceiver; require 120 Ω termination and common-mode filtering. |
| XTAL_IN, XTAL_OUT | External Crystal Oscillator | Supports 4–25 MHz crystals for precise timing; required for USB or high-accuracy CAN bit timing. |
| TCK, TMS, TDI, TDO | JTAG Debug Interface | 4-wire boundary scan and programming; compatible with MiniProg3 and industry-standard debug probes. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks | Four SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold - enabling single-chip front-end for current/voltage/temperature sensors. |
| CapSense® Integration | Hardware-accelerated capacitive touch sensing on up to 62 GPIOs with built-in IDAC and CSD block - no external components needed for touch buttons/sliders. |
| Digital Filter Processor (DFB) | 24-bit, 64-tap fixed-point engine for real-time FIR/IIR filtering - offloads CPU for vibration/noise suppression in motor or audio applications. |
| Flexible Clocking Architecture | Multiple independent clock sources (internal oscillator, PLL, crystal, low-power LFO) with 12 programmable dividers - allows dynamic power/performance scaling per peripheral. |
| USB 2.0 Full-Speed Peripheral | 12 Mbps interface certified per TID#40770053; uses internal oscillator - eliminates external crystal for USB-CDC/HID designs. |
Applications
| Industrial Motor Control | Medical Wearable Sensor Hub |
|---|---|
Use Scenario: Closed-loop BLDC motor control with current sensing, thermal monitoring, and CAN bus telemetry in factory automation drives. IC Role / Device Role / Timing Role: Central controller executing commutation logic, ADC sampling at 100 kSPS, real-time CAN frame generation, and PWM modulation at 20 kHz. Use Value: Integrated opamps and comparators condition shunt current signals; UDBs implement custom encoder decoding; CAN buffers handle burst telemetry without CPU overhead. | Use Scenario: Multi-parameter physiological monitor (ECG, SpO₂, temperature) with Bluetooth LE gateway interface and rechargeable battery management. IC Role / Device Role / Timing Role: Analog front-end aggregator, low-power state manager, and USB/UART bridge to host MCU; hibernate mode activated between sensor reads. Use Value: Delta-sigma ADC achieves 16-bit ENOB for ECG; CapSense® enables electrode contact detection; 200 nA hibernate extends battery life beyond 7 days. |
| Smart Building HVAC Node | Automotive Body Control Module (BCM) Prototype |
Use Scenario: Wireless thermostat node with ambient temperature/humidity sensing, fan speed control, and Zigbee/Thread radio coexistence. IC Role / Device Role / Timing Role: Sensor fusion hub, PWM-driven fan actuator, and radio interface coordinator; manages timing-critical RF transmit windows. Use Value: Programmable analog blocks calibrate NTC/HTS sensors; DFB filters HVAC airflow noise; GPIO routing isolates RF-sensitive analog paths from digital switching noise. | Use Scenario: Low-cost BCM evaluation platform supporting door lock actuation, window lift control, and LIN communication to mirror modules. IC Role / Device Role / Timing Role: LIN master node with configurable baud rate, PWM-controlled H-bridge drivers, and wake-on-LIN event handling. Use Value: UDBs implement LIN 2.0 physical layer and checksum logic; SIO pins drive 12 V loads directly; internal voltage reference ensures consistent ADC readings across vehicle battery range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866LTI-045 | Same die, 100-pin TQFP package; higher I/O count (72 GPIOs), no WLCSP option. | Better suited for complex PCB layouts requiring more routing flexibility and thermal mass. | Select when board space permits larger package and >62 GPIOs are needed for multi-interface designs. |
| STM32F072CBT6 | ARM Cortex-M0 core, no integrated analog configurability; requires external opamps/ADC for sensor front-end. | Lacks CapSense® and programmable analog blocks; relies on software-based filtering and external components. | Prefer when ARM toolchain familiarity outweighs need for analog integration and ultra-low-power hibernate. |
Compared with CY8C3866LTI-045, the CY8C3866AXI-035T trades I/O count for compact QFN footprint and thermal efficiency; versus STM32F072CBT6, it delivers true mixed-signal programmability without external analog components - reducing BOM cost and layout risk in sensor-rich embedded systems.
Availability
CY8C3866AXI-035T is available at Aetrix Electronics and suitable for industrial motor control, medical wearable sensor hubs, and smart building HVAC nodes requiring stable component supply, long-term lifecycle support, and validated CAN/USB interoperability.
Supply support for CY8C3866AXI-035T 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 ICs, and embedded security solutions.
The CY8C38 family belongs to Infineon's PSoC® 3 programmable SoC product line, designed specifically for ultra-low-power, mixed-signal embedded control applications where analog integration, fieldbus connectivity, and rapid firmware iteration are essential.
FAQ
Does CY8C3866AXI-035T support USB device enumeration without an external crystal?
Yes. The device integrates a factory-trimmed internal oscillator qualified for USB Full-Speed (12 Mbps) operation, certified under TID#40770053. This eliminates the need for an external 12 MHz crystal in USB-CDC or HID applications, reducing BOM count and PCB area while maintaining USB compliance.
What is the maximum achievable resolution and sampling rate of the delta-sigma ADC?
The delta-sigma ADC supports configurable resolution from 8 to 20 bits. At 20-bit mode, typical sampling rate is 125 SPS with internal reference; at 12-bit mode, it achieves up to 100 kSPS. Oversampling and digital filtering are handled in hardware by the DFB, preserving CPU bandwidth for real-time tasks.
Can CapSense® operate reliably in noisy industrial environments?
Yes. CapSense® uses spread-spectrum frequency hopping, shielded electrode routing, and hardware-based noise rejection algorithms. Tested per IEC 61000-4-3 (radiated immunity) and IEC 61000-4-6 (conducted immunity), it maintains stable button detection under 10 V/m RF fields and 10 Vpp conducted noise on supply lines.
Is the CAN controller compatible with ISO 11898-1:2015 physical layer requirements?
No - the CY8C3866AXI-035T implements the CAN protocol stack (ISO 11898-1 logical layer) but requires an external CAN transceiver (e.g., TJA1042, SN65HVD230) to meet physical layer specifications. Its CAN_TX/CAN_RX pins are CMOS-level digital outputs/inputs compliant with ISO 11898-3 signaling levels only when paired with a compliant transceiver.
CY8C3866AXI-035T 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
- 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-035T FAQ
1.How can I place an order for CY8C3866AXI-035T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXI-035T 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-035T reliable?
The price and inventory of CY8C3866AXI-035T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXI-035T is usually 5 days.
3.What payment methods are accepted for CY8C3866AXI-035T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXI-035T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXI-035T?
CY8C3866AXI-035T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXI-035T 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-035T?
For technical support, including CY8C3866AXI-035T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXI-035T requirements.
6.How does Aetrix verify that CY8C3866AXI-035T is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXI-035T 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-035T meets industry standards.
7.What is the process for return or replacement of CY8C3866AXI-035T?
All CY8C3866AXI-035T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXI-035T, 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-035T part is unused and in its original packaging.
Return procedure for CY8C3866AXI-035T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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