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Infineon Technologies CY8C3866AXA-040
- Part No.:
- CY8C3866AXA-040
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXA-040.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,045
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Product details
Overview
CY8C3866AXA-040 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, and configurable analog/digital peripherals including CAN 2.0b, USB 2.0 Full-Speed, delta-sigma ADC (20-bit, 192 ksps), and four opamps - deployed in engine control units, body electronics, and ADAS sensor interfaces.
For engineers reviewing the CY8C3866AXA-040 datasheet, CY8C3866AXA-040 pinout, CY8C3866AXA-040 application, or CY8C3866AXA-040 equivalent, key selection criteria include AEC-Q100 Grade 2 (–40 °C to +105 °C), 67 MHz CPU clock, CAN/USB dual-interface capability, 20-bit ADC performance at VDDA ≥ 2.7 V, and SSOP-48 package compatibility with automotive PCB layout constraints.
Technical Context
The CY8C3866AXA-040 implements a single-cycle 8051 microcontroller core with hardware multiply/divide, supported by a multilayer AHB bus enabling concurrent DMA transfers across 24 channels. Its analog subsystem centers on a 1.024 V ±0.1% internal reference and a configurable delta-sigma ADC delivering 20-bit resolution at 48 ksps or 12-bit at 192 ksps with programmable gain (×0.25 to ×16).
Digital flexibility derives from 24 Universal Digital Blocks (UDBs) implementing logic, state machines, and standard peripherals (UART, SPI, I²C, LIN, CRC, PRS), plus dedicated blocks for CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (TID#40770053 certified), and a 67 MHz 24-bit DFB for FIR/IIR filtering - all routed via Digital System Interconnect (DSI) to any GPIO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 67 MHz; enables deterministic real-time control loops with hardware multiply/divide. |
| Memory | 64 KB flash (100K write cycles, 20-yr retention), 8 KB SRAM, 2 KB EEPROM (1M cycles); supports firmware updates and data logging in automotive environments. |
| ADC | Configurable delta-sigma ADC: 20-bit @ 48 ksps (83 dB SINAD) or 12-bit @ 192 ksps (66 dB SINAD); usable for high-accuracy thermocouple, pressure, or current sensing. |
| CAN Interface | Full CAN 2.0b compliant with 16 Rx and 8 Tx message buffers; meets ISO 11898-1 for robust in-vehicle networking. |
| USB Interface | USB 2.0 Full-Speed (12 Mbps) peripheral interface, TID#40770053 certified, using internal oscillator - eliminates external crystal for cost-sensitive diagnostics ports. |
| Operating Temp | AEC-Q100 Grade 2: –40 °C to +105 °C; validated for under-hood and cabin-mounted automotive ECUs. |
| Supply Voltage | 1.71 V to 5.5 V wide input range; supports direct connection to 3.3 V or 5 V automotive rails without level-shifting. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Package), 0.635 mm pitch, JEDEC MS-012AC compliant, suitable for automated SMT assembly and automotive thermal cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDD | Power supply inputs | VDD (digital core), VDDA (analog), VDDD (USB PHY) support independent voltage domains; enable noise isolation between analog/digital sections. |
| P0[0]–P0[7], P1[0]–P1[7], P2[0]–P2[7], P3[0]–P3[7] | General-purpose I/O | All 32 GPIO pins support CapSense®, analog routing, digital peripherals, and configurable drive modes (open-drain, strong, Hi-Z, pull-up/down). |
| CAN_TX, CAN_RX | CAN physical layer interface | Dedicated differential pair for CAN transceiver connection; internally terminated and ESD-protected per AEC-Q100 requirements. |
| USBDP, USBDM | USB 2.0 Full-Speed differential pair | On-die USB PHY with integrated termination; requires no external resistors or crystal - reduces BOM count for diagnostic interfaces. |
| XIN, XOUT | Crystal oscillator terminals | Supports 4–25 MHz crystal for precise timing; optional when using internal IMO or PLL for CAN/USB clock derivation. |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; compatible with automotive watchdog ICs and power-supply supervisors. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array | 24 Universal Digital Blocks enable custom logic, state machines, or reconfigurable peripherals - eliminating need for external CPLDs in sensor fusion or protocol bridging. |
| Delta-sigma ADC Flexibility | Software-selectable resolution (8–20 bit), sample rate (up to 192 ksps), and gain (×0.25–×16); allows one device to serve multiple sensor types without hardware change. |
| Automotive Clocking | Multiple clock sources: IMO (3–62 MHz), crystal oscillator (4–25 MHz), PLL (up to 67 MHz), and 32.768 kHz RTC oscillator - ensures timing compliance across battery voltage and temperature extremes. |
| CapSense® Integration | Capacitive touch sensing on any GPIO with built-in IDACs and scanning engine; enables seamless integration of human-machine interfaces in infotainment and climate control panels. |
| Low-Power Modes | 200 nA hibernate mode with RAM retention and 1 µA sleep mode with RTC/LVD interrupt - extends battery life in always-on vehicle modules like keyless entry receivers. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time acquisition of crankshaft position, throttle angle, and oxygen sensor signals in gasoline/diesel powertrain systems. IC Role / Device Role / Timing Role: Central signal processing unit performing ADC sampling, CAN message formatting, and closed-loop fuel injection timing control. Use Value: 20-bit ADC resolution and 67 MHz CPU enable sub-degree crankshaft angle accuracy; CAN 2.0b ensures deterministic communication with transmission and ABS modules. |
Use Scenario: Managing door locks, window lifts, mirror adjustment, and interior lighting via centralized microcontroller. IC Role / Device Role / Timing Role: Integrated mixed-signal controller handling analog sensor inputs (potentiometers, ambient light), PWM motor drives, and LIN/CAN gateway functions. Use Value: Four opamps and IDACs directly condition potentiometer signals; configurable UDBs implement custom LIN slave protocols without external transceivers. |
| Advanced Driver Assistance Systems (ADAS) Sensor Hub | In-Vehicle Infotainment (IVI) Touch Interface |
|
Use Scenario: Aggregating and preprocessing raw data from ultrasonic parking sensors, radar front-end bias controls, and temperature compensation circuits. IC Role / Device Role / Timing Role: Analog front-end processor with synchronized multi-channel delta-sigma ADC sampling and digital filtering before CAN transmission to central ADAS ECU. Use Value: 67 MHz DFB block executes real-time FIR filters on ultrasonic echo data; 1.024 V reference ensures <±1 LSB INL over –40 °C to +105 °C for consistent echo timing. |
Use Scenario: Capacitive touch controller for center console buttons, rotary encoders, and slider controls in automotive dashboards. IC Role / Device Role / Timing Role: Dedicated CapSense® subsystem managing self- and mutual-capacitance measurements across 32+ electrodes with noise immunity in noisy 12 V vehicle environments. Use Value: On-chip IDACs and shield drivers eliminate external components; GPIO-routed CapSense® supports mechanical button replacement with zero added BOM cost. |
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, 112 MHz, 1 MB flash, CAN FD support, no integrated high-resolution ADC or CapSense® | Better suited for high-speed CAN FD gateways and motor control; lacks analog configurability for sensor front-ends | Select when CAN FD bandwidth > 1 Mbps is required and external ADCs are acceptable. |
| Renesas RL78/F14 | 16-bit RL78 core, 32 MHz, 512 KB flash, 12-bit SAR ADC (1 Msps), no USB or CapSense® | Optimized for ultra-low-power body electronics; limited digital flexibility and no USB diagnostics interface | Select for cost-sensitive, low-complexity BCMs where USB programming and capacitive HMI are unnecessary. |
Compared with NXP S32K144 and Renesas RL78/F14, CY8C3866AXA-040 uniquely combines automotive-grade analog precision (20-bit ADC, 1.024 V ref), USB 2.0 FS, and CapSense® in a single chip - reducing component count in sensor hubs and HMI nodes where mixed-signal integration is critical.
Availability
CY8C3866AXA-040 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor interfaces requiring stable component supply across extended automotive lifecycles.
Supply support for CY8C3866AXA-040 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 ICs, and security solutions with broad manufacturing scale and AEC-Q100 validation infrastructure.
CY8C3866AXA-040 belongs to the PSoC® 3 automotive family - designed specifically for mixed-signal, real-time control applications in harsh automotive environments where analog precision, digital flexibility, and qualification rigor are non-negotiable.
FAQ
Is CY8C3866AXA-040 pin-compatible with other CY8C38 devices in SSOP-48 package?
Yes - CY8C3866AXA-040 shares identical pinout with all CY8C38xx-AXA variants in 48-pin SSOP, including CY8C3866LTXA-040 and CY8C3866AZI-040. Pin functions (e.g., CAN_TX, USBDP, VDDA) and electrical characteristics are consistent across the AXA suffix family per datasheet Section 2 and Table 12-1.
Does CY8C3866AXA-040 support USB device enumeration without an external crystal?
Yes - its USB 2.0 Full-Speed peripheral uses an internal oscillator calibrated to ±0.25% over temperature and voltage, meeting USB specification requirements for device enumeration. External crystal is optional and only needed if higher clock accuracy is required for non-USB functions.
What is the maximum operating temperature grade for CY8C3866AXA-040?
CY8C3866AXA-040 is rated for AEC-Q100 Grade 2: –40 °C to +105 °C ambient operating temperature. This is confirmed in Section 1.2 ("Temperature and packaging") of datasheet 001-54683 Rev. *L and ordering information table on page 135.
Can the delta-sigma ADC operate at full 20-bit resolution below 2.7 V VDDA?
No - 20-bit resolution with 83 dB SINAD is specified only at VDDA ≥ 2.7 V per Note 1 in the datasheet. At lower VDDA (1.71–2.69 V), maximum resolution drops to 16-bit with reduced SINAD; detailed specs are provided in Table 11-17 for sub-2.7 V operation.
CY8C3866AXA-040 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, 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-040 FAQ
1.How can I place an order for CY8C3866AXA-040 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXA-040 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-040 reliable?
The price and inventory of CY8C3866AXA-040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXA-040 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXA-040?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXA-040 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXA-040?
CY8C3866AXA-040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXA-040 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-040?
For technical support, including CY8C3866AXA-040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXA-040 requirements.
6.How does Aetrix verify that CY8C3866AXA-040 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXA-040 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-040 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXA-040?
All CY8C3866AXA-040 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXA-040, 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-040 part is unused and in its original packaging.
Return procedure for CY8C3866AXA-040:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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