My Inquiry
My Account
Infineon Technologies CY8C3866AXA-039
- Part No.:
- CY8C3866AXA-039
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXA-039.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,029
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C3866AXA-039 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 configurable analog/digital peripherals including CAN 2.0b, USB 2.0 Full-Speed, delta-sigma ADC (20-bit, 192 ksps), four opamps, and CapSense®. It operates from 1.71 V to 5.5 V across –40 °C to +85 °C and targets engine control, body electronics, and ADAS sensor interface applications.
For engineers reviewing the CY8C3866AXA-039 datasheet, CY8C3866AXA-039 pinout, CY8C3866AXA-039 application, or CY8C3866AXA-039 equivalent, key selection criteria include AEC-Q100 compliance, integrated CAN/USB connectivity, programmable analog blocks (PGA/TIA), 20-bit delta-sigma ADC performance at ≥2.7 V VDDA, and 100-pin TQFP packaging with 62 GPIOs and eight SIOs.
Technical Context
The CY8C3866AXA-039 implements a single-cycle 8051 microcontroller core running at up to 67 MHz via internal PLL, with 512-byte flash cache and ECC-protected configuration storage. Its digital subsystem centers on 24 Universal Digital Blocks (UDBs) supporting user-defined logic, timers, PWMs, I2C, LIN, and quadrature decoding - all routed flexibly to any GPIO via the Digital System Interconnect (DSI).
Analog functionality includes a 1.024 V ±0.1% reference, delta-sigma ADC with programmable gain (×0.25–×16) and resolution modes (8–20 bit), four comparators (95 ns response), four uncommitted opamps (25 mA drive), and four SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold - all operating within 1.71–5.5 V analog supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051, up to 67 MHz operation - enables deterministic real-time control with minimal instruction latency. |
| Memory | 64 KB flash (100k write cycles, 20 yr retention), 8 KB SRAM, 2 KB EEPROM (1M cycles) - supports robust firmware updates and data logging in automotive environments. |
| ADC | Delta-sigma, 20-bit max resolution, 192 ksps at 12-bit mode (66 dB SINAD) - delivers high-accuracy thermocouple, pressure, or current sensing without external signal conditioning. |
| CAN Interface | Full CAN 2.0b compliant with 16 Rx / 8 Tx buffers - provides native vehicle network integration without external transceiver logic. |
| Operating Temp | –40 °C to +85 °C, AEC-Q100 Grade 2 qualified - certified for under-hood and cabin-mounted automotive ECUs. |
| I/O Count | 62 GPIO + 8 SIO + 2 USBIO pins in 100-pin TQFP - enables direct connection to sensors, actuators, displays, and USB host devices. |
| Power Modes | 1 µA sleep (RTC + LVD active), 200 nA hibernate (RAM retention) - extends battery life in always-on vehicle modules like door controllers. |
Pinout & Package
Package: 100-pin Thin Quad Flat Package (TQFP), RoHS-compliant, 0.5 mm pitch, body size 14 × 14 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose I/O bank 0 | Configurable as digital input/output, analog input, CapSense electrode, or LCD segment driver - supports mixed-signal routing to UDBs or ADC. |
| P1[0]–P1[7] | General-purpose I/O bank 1 | Supports Schmitt-trigger inputs, open-drain outputs, and programmable pull-up/down - suitable for switch debouncing or bus termination. |
| SIO0–SIO7 | Special I/O with enhanced drive | 25 mA sink capability per pin - drives LEDs, relays, or solenoids directly without external drivers. |
| USB_D+ / USB_D− | USB 2.0 Full-Speed differential pair | Integrated PHY with internal oscillator support - eliminates need for external crystal or USB transceiver IC. |
| CAN_TX / CAN_RX | CAN 2.0b physical layer interface | Direct connection to external CAN transceiver (e.g., TJA1042) - no internal level-shifting; requires external bus protection. |
| VDDA / VSSA | Analog power supply domain | 1.71–5.5 V analog rail with independent filtering - critical for maintaining ADC accuracy and opamp PSRR across noise-prone automotive environments. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Analog Blocks | Four SC/CT blocks support PGA (gain ×1–×48), TIA (for photodiode current-to-voltage conversion), mixer, and sample-and-hold - enabling sensor front-end customization without discrete components. |
| CapSense® Integration | Capacitive touch sensing on any GPIO with built-in IDACs and CSD block - allows button/slider/knob implementation with <100 µA active current and immunity to ESD up to ±15 kV air discharge. |
| Digital Filter Block (DFB) | 24-bit fixed-point FIR/IIR filter engine running at 67 MHz - performs real-time motor control loop filtering or audio preprocessing without CPU intervention. |
| Secure Bootloader | Supports field firmware updates over I2C, SPI, UART, or USB with flash checksum verification and optional encryption - meets ISO 21434 cybersecurity requirements for OTA updates. |
| Low-Power Clocking | Three independent oscillators: IMO (3–62 MHz), ILO (1/33/100 kHz), and 32.768 kHz RTC crystal input - enables precise wake-from-sleep timing while minimizing quiescent current. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time monitoring of throttle position, coolant temperature, and oxygen sensor signals in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Central signal acquisition and closed-loop actuator control unit with CAN-based communication to transmission and ABS modules. Use Value: Integrated 20-bit delta-sigma ADC and PGA eliminate external signal conditioners; CAN 2.0b buffers ensure deterministic message scheduling during transient load events. |
Use Scenario: Managing door locks, window lifts, mirror adjustment, and interior lighting via capacitive touch and relay drivers. IC Role / Device Role / Timing Role: Mixed-signal controller handling analog sensor inputs (e.g., ambient light), digital switches, and PWM-driven LED dimming. Use Value: CapSense® on GPIOs reduces BOM count vs. dedicated touch ICs; SIO pins drive relays directly, cutting external transistor count by ≥4. |
| Advanced Driver Assistance Systems (ADAS) Sensor Hub | Automotive Infotainment Interface |
|
Use Scenario: Aggregating radar, ultrasonic parking, and camera focus voltage signals before forwarding to central ADAS processor. IC Role / Device Role / Timing Role: Preprocessing node performing analog signal conditioning, oversampling, and time-stamped CAN message formatting. Use Value: DFB executes real-time FIR filtering on ultrasonic echo data; 1.024 V reference ensures consistent gain calibration across temperature for radar bias circuits. |
Use Scenario: Supporting touchscreen overlay, rotary encoder, and audio codec control in head unit or display cluster. IC Role / Device Role / Timing Role: Human-machine interface (HMI) controller managing CapSense buttons, SPI-connected display driver, and I2C audio codec registers. Use Value: Single-chip solution replaces separate MCU + touch controller + audio interface ICs; USB FS enables firmware updates via service port. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP S32K144 | ARM Cortex-M4F core, 160 MHz, CAN FD support, no integrated high-resolution ADC or CapSense | Better suited for safety-critical ASIL-B functions but requires external ADC and touch controller for sensor hub use cases | Select when CAN FD bandwidth or functional safety certification (ISO 26262) is mandatory; avoid if analog integration or capacitive HMI is primary requirement |
| Renesas RL78/F14 | 16-bit RL78 core, 32 MHz, 12-bit SAR ADC (1 Msps), no USB or CapSense, lower power in deep sleep (300 nA) | Targeted at cost-sensitive body electronics where USB/CapSense are unnecessary and ultra-low standby current is critical | Select for simple BCM applications with minimal analog channels and no USB connectivity needs; not viable for ADAS sensor preprocessing |
Compared with NXP S32K144 and Renesas RL78/F14, CY8C3866AXA-039 uniquely combines automotive-grade programmable analog (20-bit delta-sigma ADC, PGA, TIA), CapSense®, and USB FS in one die - reducing system-level component count and PCB area where mixed-signal flexibility outweighs ARM performance or ASIL-B certification needs.
Availability
CY8C3866AXA-039 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS sensor hubs, and infotainment interfaces requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100 qualification.
Supply support for CY8C3866AXA-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 is a global semiconductor leader headquartered in Munich, Germany, specializing in power systems, automotive MCUs, and security solutions with broad industrial and automotive market reach.
CY8C3866AXA-039 belongs to the PSoC® 3 automotive family - designed specifically for cost-sensitive, high-integration automotive ECUs needing configurable analog/digital peripherals, CAN/USB connectivity, and AEC-Q100 reliability without migrating to 32-bit architectures.
FAQ
Is CY8C3866AXA-039 pin-compatible with other CY8C38 family members?
Yes, CY8C3866AXA-039 uses the 100-pin TQFP package shared with CY8C3866LTI-039 and CY8C3866AXI-039. Pin assignments for power, reset, clock, and core peripherals (CAN, USB, JTAG) are identical across these variants. Differences exist only in temperature grade (A = –40°C to +85°C) and internal flash configuration - no PCB redesign is needed when substituting within the same package option.
Does CY8C3866AXA-039 require an external CAN transceiver?
Yes, CY8C3866AXA-039 provides only the CAN protocol controller and physical layer signaling pins (CAN_TX/CAN_RX); it does not integrate a bus driver. An external high-speed CAN transceiver such as the TJA1042T/3 or SN65HVD230 must be used to interface with the CAN bus, with proper termination and ESD protection implemented per ISO 11898-2.
What development tools support CY8C3866AXA-039 firmware creation?
CY8C3866AXA-039 is fully supported by PSoC Creator™ IDE v4.4 (last official version), which provides schematic-based design entry, component catalog integration (ADC, CapSense, CAN, USB), and debug via MiniProg3 or KitProg2 programmers. Code generation targets Keil C51 compiler, and hardware debugging uses SWD/JTAG with real-time trace buffer visibility.
Can the delta-sigma ADC operate at full 20-bit resolution across the entire automotive temperature range?
No - 20-bit resolution is achievable only at room temperature and VDDA ≥ 2.7 V. At –40°C to +85°C and VDDA = 1.71 V, the ADC's effective resolution degrades to 16-bit (±2 LSB INL) with 48 ksps sampling rate and 83 dB SINAD, as specified in Table 11-17 of the datasheet. For guaranteed 20-bit performance, maintain VDDA ≥ 3.3 V and limit operating temperature to 0°C–70°C.
CY8C3866AXA-039 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:
- 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:
CY8C3866AXA-039 FAQ
1.How can I place an order for CY8C3866AXA-039 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXA-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 CY8C3866AXA-039 reliable?
The price and inventory of CY8C3866AXA-039 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXA-039 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXA-039?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXA-039 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXA-039?
CY8C3866AXA-039 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXA-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 CY8C3866AXA-039?
For technical support, including CY8C3866AXA-039 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXA-039 requirements.
6.How does Aetrix verify that CY8C3866AXA-039 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXA-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 CY8C3866AXA-039 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXA-039?
All CY8C3866AXA-039 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXA-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 CY8C3866AXA-039 part is unused and in its original packaging.
Return procedure for CY8C3866AXA-039:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C3866AXA-039 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
