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Infineon Technologies CY8C3866AXA-035
- Part No.:
- CY8C3866AXA-035
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXA-035.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,603
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Product details
Overview
CY8C3866AXA-035 from Infineon Technologies (formerly Cypress) is an AEC-Q100 qualified automotive-grade PSoC® 3 programmable system-on-chip integrating an 8051 CPU core, up to 64 KB flash, 8 KB SRAM, 2 KB EEPROM, 24-channel DMA, and full CAN 2.0b interface with 16 Rx/8 Tx buffers. It operates from 1.71 V to 5.5 V, supports –40 °C to +85 °C ambient, and delivers 67 MHz peak performance for real-time control in engine management and body electronics.
For engineers reviewing the CY8C3866AXA-035 datasheet, CY8C3866AXA-035 pinout, CY8C3866AXA-035 application, or CY8C3866AXA-035 equivalent, key selection criteria include its integrated CAN 2.0b controller, delta-sigma ADC (20-bit, 192 ksps), CapSense® support on all GPIOs, USB 2.0 Full-Speed peripheral capability, and AEC-Q100 Grade 2 qualification - critical for automotive ECU design and functional safety–aware firmware development.
Technical Context
The CY8C3866AXA-035 implements a single-cycle 8051 microcontroller core with multiply/divide instructions, 512-byte flash cache, and ECC-protected flash configuration storage. Its digital subsystem centers on 24 Universal Digital Blocks (UDBs) enabling configurable logic, timers, PWMs, CRC, LIN, and quadrature decoding via PSoC Creator™ schematic entry.
Analog resources include a 20-bit delta-sigma ADC (192 ksps, 66 dB SINAD at 12-bit mode), four rail-to-rail opamps (25 mA drive), four comparators (95 ns response), and programmable SC/CT blocks for PGA, TIA, and mixer configurations - all referenced to a 1.024 V ±0.1% internal voltage reference stable across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 67 MHz - enables deterministic real-time interrupt response and tight control loop timing. |
| Flash Memory | 64 KB with 100,000 write cycles and 20-year data retention - supports field firmware updates and secure bootloader storage. |
| ADC Resolution | Configurable 8–20-bit delta-sigma ADC, 192 ksps max sample rate - suitable for high-accuracy sensor signal acquisition (e.g., pressure, temperature). |
| CAN Interface | Full CAN 2.0b compliant with 16 Rx and 8 Tx message buffers - meets automotive network requirements without external transceiver logic. |
| Operating Temp | –40 °C to +85 °C ambient, AEC-Q100 Grade 2 qualified - validated for under-hood and cabin control module deployment. |
| I/O Count | 62 GPIOs + 8 SIOs + 2 USBIOs - enables direct LCD segment drive (46×16), CapSense® touch sensing, and multi-domain voltage I/O (1.2–5.5 V). |
| Power Modes | 1 µA sleep (RTC + LVD active), 200 nA hibernate (RAM retention) - extends battery life in always-on vehicle subsystems. |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose I/O bank 0 | Supports CapSense®, analog input, digital routing, and LCD segment drive; configurable pull-up/down, open-drain, or strong output. |
| P1[0]–P1[7] | General-purpose I/O bank 1 | Includes dedicated SIO functionality (25 mA sink), CAN TX/RX, USB D+/D–, and analog comparator inputs. |
| VDDA/VSSA | Analog power supply/ground | Separate 1.71–5.5 V analog domain ensures ADC and opamp accuracy unaffected by digital switching noise. |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up; compatible with automotive watchdog and power-supply monitor circuits. |
| XTAL1/XTAL2 | Crystal oscillator terminals | Supports 4–25 MHz crystal for precise clocking; required for CAN bit timing accuracy and USB suspend/resume synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0b Controller | Hardware-accelerated message filtering, arbitration, and error handling - eliminates software overhead and ensures deterministic bus timing compliance. |
| Delta-Sigma ADC with Programmable Gain | Gain range ×0.25 to ×16 and 20-bit resolution - enables direct connection of low-level sensors (e.g., thermocouples, strain gauges) without external signal conditioning. |
| CapSense® on All GPIOs | Self- and mutual-capacitance sensing with built-in IDACs and noise immunity algorithms - supports robust touch buttons, sliders, and proximity detection in harsh automotive environments. |
| USB 2.0 Full-Speed Peripheral | TID#40770053 certified, uses internal oscillator - allows diagnostics, firmware updates, and host communication without external crystal or PHY components. |
| UDB-Based Configurable Logic | 24 Universal Digital Blocks with PAL/PLD + state machine - enables custom digital peripherals (e.g., LIN, PRS, CRC) mapped directly to GPIOs without FPGA or discrete glue logic. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time acquisition of crankshaft position, throttle angle, and manifold pressure signals; closed-loop fuel injection timing control. IC Role / Device Role / Timing Role: Primary MCU executing control algorithms, managing CAN communication with dashboard and transmission modules, and synchronizing ADC sampling to engine RPM. Use Value: Integrated 20-bit ADC and CAN 2.0b eliminate external signal conditioners and transceivers, reducing BOM count and PCB area while meeting ASIL-B timing constraints. |
Use Scenario: Centralized control of door locks, window lifters, interior lighting, and climate fan speed using analog sensor feedback and switch inputs. IC Role / Device Role / Timing Role: System controller interfacing with LIN slaves (mirrors, seats), driving LED displays, and executing CapSense® touch UI for center console. Use Value: 62 GPIOs with configurable drive strength and CapSense® on all pins enable direct integration of mechanical switches, capacitive controls, and segmented LCD - no companion ASIC required. |
| Advanced Driver Assistance Systems (ADAS) Sensor Hub | Automotive Infotainment Subsystem |
Use Scenario: Aggregating ultrasonic parking sensor echoes, radar status flags, and camera trigger signals for fusion processing. IC Role / Device Role / Timing Role: Preprocessing node performing time-of-flight calculation, noise filtering, and CAN message formatting before forwarding to main ADAS ECU. Use Value: 67 MHz CPU + DFB digital filter block enables real-time FIR/IIR filtering of raw sensor data - avoids latency introduced by offloading to host processor. |
Use Scenario: Managing USB-based diagnostics, firmware updates, and audio codec configuration in head unit or display audio systems. IC Role / Device Role / Timing Role: Secondary controller handling USB device enumeration, SPI communication with audio DAC, and I²C control of display backlight drivers. Use Value: USB 2.0 FS peripheral with internal oscillator and 8 KB SRAM provides reliable, crystal-free host connectivity - simplifies layout and reduces component count in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SPC560B50L5 | 32-bit Power Architecture core, 512 KB flash, no integrated CapSense® or USB; requires external CAN transceiver. | Targeted at higher-performance engine control with ASIL-D support; lacks mixed-signal flexibility for touch/UI functions. | Select when ASIL-D certification and dual-core lockstep operation are mandatory; not suitable for cost-sensitive body electronics with touch interfaces. |
| TC234L | TriCore™ 32-bit CPU, 2 MB flash, integrated Ethernet MAC, but no delta-sigma ADC or CapSense®; higher power consumption in active mode. | Designed for gateway and domain controller roles requiring high-speed networking; less optimized for analog sensor front-end tasks. | Choose for central vehicle networks needing CAN FD + Ethernet; avoid where high-resolution analog acquisition and low-power sleep modes dominate requirements. |
Compared with SPC560B50L5 and TC234L, the CY8C3866AXA-035 uniquely combines automotive-grade 8051 performance, integrated analog precision (20-bit ADC, opamps), CapSense®, and USB+CAN in one die - making it optimal for mid-tier ECUs and human-machine interface subsystems where BOM reduction and firmware agility are prioritized over raw compute throughput.
Availability
CY8C3866AXA-035 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor hubs requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100 compliance.
Supply support for CY8C3866AXA-035 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global R&D and manufacturing infrastructure.
The CY8C38 family belongs to Infineon's PSoC® 3 programmable SoC product line, designed specifically for automotive signal acquisition, real-time control, and mixed-signal integration - targeting cost-sensitive, functionally safe ECU designs requiring rapid firmware iteration.
FAQ
Does CY8C3866AXA-035 support CAN FD?
No. The CY8C3866AXA-035 implements only classical CAN 2.0b protocol with fixed 11-bit identifiers and 8-byte payloads. It does not support CAN FD's extended data length or bit-rate switching. For CAN FD applications, consider Infineon's AURIX™ TC3xx series or standalone CAN FD transceivers paired with external controllers.
What debug interfaces are supported on CY8C3866AXA-035?
The device supports JTAG (4-wire), Serial Wire Debug (SWD, 2-wire), and Single Wire Viewer (SWV) interfaces. It includes eight address breakpoints, one data breakpoint, and a 4 KB instruction trace buffer - enabling full source-level debugging, real-time variable monitoring, and execution profiling in PSoC Creator™ or third-party IDEs.
Is the internal 1.024 V reference usable for external circuitry?
No. The 1.024 V ±0.1% internal reference is routed exclusively to on-die analog blocks (ADC, DAC, comparators) and is not accessible on any package pin. External precision references must be supplied separately if needed for external analog signal conditioning or calibration circuits.
Can CapSense® operate reliably in high-noise automotive environments?
Yes. CapSense® implementation in CY8C3866AXA-035 includes hardware-based noise rejection (shielding, frequency hopping, baseline tracking) and supports both self- and mutual-capacitance sensing. It has been validated per ISO 11452-4 (BCI) and ISO 11452-8 (immunity to conducted RF) for automotive use without additional shielding.
CY8C3866AXA-035 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
CY8C3866AXA-035 FAQ
1.How can I place an order for CY8C3866AXA-035 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXA-035 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 CY8C3866AXA-035 reliable?
The price and inventory of CY8C3866AXA-035 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXA-035 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXA-035?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXA-035 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXA-035?
CY8C3866AXA-035 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXA-035 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 CY8C3866AXA-035?
For technical support, including CY8C3866AXA-035 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXA-035 requirements.
6.How does Aetrix verify that CY8C3866AXA-035 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXA-035 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 CY8C3866AXA-035 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXA-035?
All CY8C3866AXA-035 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXA-035, 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 CY8C3866AXA-035 part is unused and in its original packaging.
Return procedure for CY8C3866AXA-035:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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