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Infineon Technologies CY8C3866AXA-055
- Part No.:
- CY8C3866AXA-055
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXA-055.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,136
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Product details
Overview
CY8C3866AXA-055 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® support - deployed in engine control units and body electronics requiring mixed-signal reconfigurability.
For engineers reviewing the CY8C3866AXA-055 datasheet, CY8C3866AXA-055 pinout, CY8C3866AXA-055 application, or CY8C3866AXA-055 equivalent, key selection criteria include AEC-Q100 Grade 2 (–40 °C to +105 °C), 48-pin SSOP package, CAN/USB dual-interface capability, 67 MHz max CPU clock, and on-chip analog subsystem with programmable gain amplifiers and 95 ns comparators.
Technical Context
The CY8C3866AXA-055 implements a hardened 8051 microcontroller core with single-cycle execution, 512-byte flash cache, and ECC-protected flash configuration storage. Its digital subsystem uses 24 Universal Digital Blocks (UDBs) for custom logic synthesis and includes dedicated hardware for CAN 2.0b (16 Rx/8 Tx buffers) and USB 2.0 FS (TID#40770053 certified).
Analog functionality centers on a 20-bit delta-sigma ADC with programmable gain (×0.25 to ×16), 1.024 V ±0.1% internal reference, four rail-to-rail opamps (25 mA drive), and four comparators (95 ns propagation). All analog blocks operate across 1.71–5.5 V VDDA and support CapSense® capacitive sensing directly from GPIO pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 67 MHz - enables deterministic real-time control loops without instruction pipelining overhead. |
| Flash Memory | 64 KB with 100,000 write cycles and 20-year data retention - supports field firmware updates and secure boot partitioning. |
| ADC Resolution | 20-bit delta-sigma with 192 ksps sample rate at 12-bit mode - delivers 66 dB SINAD for high-fidelity sensor signal acquisition. |
| CAN Interface | Full CAN 2.0b compliant with 16 receive and 8 transmit buffers - meets automotive network timing and arbitration requirements. |
| Operating Temp | –40 °C to +105 °C (Grade 2 per AEC-Q100) - validated for under-hood automotive environments with thermal derating. |
| I/O Count | 62 GPIO + 8 SIO + 2 USBIO - provides flexible routing to analog/digital peripherals and supports LCD direct drive (46×16 segments). |
| Power Modes | 200 nA hibernate with RAM retention and 1 µA sleep with RTC/LVD - enables ultra-low-power wake-on-event operation in battery-backed systems. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Package), 0.635 mm pitch, JEDEC MS-012AC, body size 15.4 mm × 7.6 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | 1.71–5.5 V input powering CPU, digital logic, and I/O banks - supports multi-voltage domain operation. |
| VDDA | Analog power supply | 1.71–5.5 V dedicated analog rail - isolates noise-sensitive ADC/DAC/opamp circuits from digital switching transients. |
| XRES | Active-low reset input | Asynchronous external reset with Schmitt-trigger input - ensures reliable deassertion during noisy automotive transients. |
| P0[0]–P0[7] | General-purpose I/O bank | Configurable as GPIO, analog input, CapSense electrode, or USB D+ - routed to UDB array and analog subsystem via DSI. |
| CAN_TX / CAN_RX | CAN physical layer interface | Dedicated differential pair pins supporting ISO 11898-2 compliant signaling - internally terminated and slew-rate controlled. |
| USBDP / USBDM | USB 2.0 Full-Speed differential pair | On-die USB PHY with integrated termination - eliminates need for external resistors and meets USB-IF electrical compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Analog Subsystem | Four opamps (25 mA output), four comparators (95 ns), programmable SC/CT blocks for PGA/TIA/mixer - enables sensor front-end customization without external components. |
| CapSense® Integration | Capacitive touch sensing supported on all GPIO pins with built-in IDACs and noise immunity algorithms - eliminates dedicated touch controller ICs in HMI designs. |
| Automotive Clocking | 32.768 kHz watch crystal oscillator + 4–25 MHz crystal oscillator + PLL up to 67 MHz - satisfies ASAM MCD-2 MC clock accuracy and jitter requirements. |
| Secure Firmware Update | Flash security features including read protection, write protection, and bootloader support over UART/I2C/SPI/USB - prevents unauthorized firmware modification in production ECUs. |
| Low-Power Flexibility | Hibernate mode (200 nA) with RAM retention + sleep mode (1 µA) with RTC/LVD interrupt - enables always-on monitoring with minimal battery drain in telematics modules. |
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 direct injection systems. IC Role / Device Role / Timing Role: Mixed-signal system-on-chip performing sensor signal conditioning, closed-loop fuel injection timing, and CAN-based actuator command dispatch. Use Value: Delta-sigma ADC with 20-bit resolution and programmable gain enables precise lambda sensor voltage measurement; CAN 2.0b interface ensures deterministic communication with transmission ECU. |
Use Scenario: Centralized management of door locks, window lifts, mirror adjustment, and interior lighting via LIN and CAN networks. IC Role / Device Role / Timing Role: Configurable MCU coordinating multiple motor drivers, capacitive touch buttons, and status LEDs while maintaining low quiescent current. Use Value: CapSense® support on GPIO eliminates mechanical switches; 200 nA hibernate mode extends battery life during vehicle standby periods. |
| Advanced Driver Assistance Systems (ADAS) Sensor Hub | Automotive Infotainment Front Panel |
Use Scenario: Aggregation and preprocessing of ultrasonic parking sensor echoes and radar proximity alerts before forwarding to ADAS domain controller. IC Role / Device Role / Timing Role: Signal acquisition node with high-bandwidth analog front-end (opamps + comparators) and time-critical digital filtering (DFB block). Use Value: 67 MHz DFB block implements real-time FIR filters for echo cancellation; 95 ns comparators enable fast edge detection on ultrasonic return pulses. |
Use Scenario: Touch-responsive dashboard interface with backlight dimming, audio volume control, and HVAC setting adjustment. IC Role / Device Role / Timing Role: Human-machine interface controller managing CapSense® buttons, PWM-driven LED backlight, and I2C-connected display driver. Use Value: Integrated 8-bit VDACs generate smooth analog backlight control; GPIO routability allows any pin to serve as CapSense electrode or PWM output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon CY8C3866LTI-061 | 100-pin TQFP package, extended temperature range (–40 °C to +125 °C), same core/peripherals but higher I/O count (72 total) | Suitable for under-hood applications requiring wider thermal margin and more analog inputs (e.g., battery management systems) | Select when board layout accommodates larger footprint and thermal environment exceeds +105 °C. |
| NXP S32K144HAT0MLHT | ARM Cortex-M4F core, 1 MB flash, CAN FD, no integrated analog subsystem - requires external ADC/opamps for sensor conditioning | Better suited for high-speed CAN FD networking and safety-critical ASIL-B functions, but lacks on-chip CapSense® or programmable analog blocks | Choose when functional safety certification (ISO 26262) and CAN FD bandwidth are prioritized over analog integration. |
Compared with CY8C3866LTI-061, the CY8C3866AXA-055 trades I/O count and thermal range for compact SSOP packaging ideal for space-constrained BCMs; versus S32K144HAT0MLHT, it offers superior analog integration and CapSense® at the expense of ARM ecosystem tooling and ASIL-B support.
Availability
CY8C3866AXA-055 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS sensor hubs, and infotainment front panels requiring stable component supply across automotive production lifecycles.
Supply support for CY8C3866AXA-055 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 security solutions with vertical integration from silicon to system-level software.
CY8C3866AXA-055 belongs to the PSoC® 3 automotive family - designed specifically for reconfigurable mixed-signal control in AEC-Q100-compliant environments where analog flexibility, CAN/USB connectivity, and ultra-low-power operation are critical.
FAQ
Is CY8C3866AXA-055 pin-compatible with other CY8C38 devices?
Yes - CY8C3866AXA-055 shares identical 48-pin SSOP pinout with all CY8C38xxAXA-x variants (e.g., CY8C3866AXI-041, CY8C3866AXI-042). Pin functions are consistent across speed grades and temperature grades within the AXA suffix family, enabling drop-in replacement for design revisions.
Does CY8C3866AXA-055 support USB device enumeration without external crystal?
Yes - the part integrates a factory-trimmed internal oscillator qualified for USB 2.0 Full-Speed (12 Mbps) operation, certified under TID#40770053. No external crystal is required for USB device mode, reducing BOM cost and PCB area in cost-sensitive automotive accessories.
What is the maximum operating junction temperature for CY8C3866AXA-055?
The device is rated for AEC-Q100 Grade 2 operation with ambient temperature range –40 °C to +105 °C. Under typical automotive airflow conditions and 67 MHz operation, maximum junction temperature remains ≤125 °C per thermal characterization in the datasheet's Section 11.2.
Can CapSense® be implemented on all GPIO pins simultaneously?
No - while CapSense® electrodes can be assigned to any GPIO, simultaneous use of all 62 GPIOs as active sense channels is limited by analog routing resources and IDAC current budget. Practical implementation supports up to 32 independent buttons/sliders using shared IDACs and sequential scanning.
CY8C3866AXA-055 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, 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-055 FAQ
1.How can I place an order for CY8C3866AXA-055 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXA-055 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-055 reliable?
The price and inventory of CY8C3866AXA-055 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXA-055 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXA-055?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXA-055 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXA-055?
CY8C3866AXA-055 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXA-055 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-055?
For technical support, including CY8C3866AXA-055 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXA-055 requirements.
6.How does Aetrix verify that CY8C3866AXA-055 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXA-055 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-055 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXA-055?
All CY8C3866AXA-055 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXA-055, 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-055 part is unused and in its original packaging.
Return procedure for CY8C3866AXA-055:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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