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Infineon Technologies CY8C3866AXA-038
- Part No.:
- CY8C3866AXA-038
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXA-038.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,368
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Product details
Overview
CY8C3866AXA-038 from Infineon Technologies (formerly Cypress) is an AEC-Q100 qualified automotive-grade PSoC® 3 programmable system-on-chip integrating an 8051 CPU core, configurable analog/digital peripherals, USB 2.0 Full-Speed interface, CAN 2.0b controller, and delta-sigma ADC with up to 20-bit resolution. It operates from 1.71 V to 5.5 V, supports –40 °C to +85 °C ambient, and delivers 67 MHz CPU performance with 64 KB flash, 8 KB SRAM, and 2 KB EEPROM - deployed in engine control modules, body electronics gateways, and battery management systems.
For engineers reviewing the CY8C3866AXA-038 datasheet, CY8C3866AXA-038 pinout, CY8C3866AXA-038 application, or CY8C3866AXA-038 equivalent, key selection criteria include its integrated CAN+USB dual-interface capability, automotive temperature compliance, configurable UDB array for custom logic, and on-chip CapSense® support for touch HMI in harsh environments.
Technical Context
The CY8C3866AXA-038 implements a single-cycle 8051 microcontroller core with up to 67 MHz operation, supported by a multilayer AHB bus, 24-channel DMA, and programmable clock tree including internal PLL, IMO (3–62 MHz), and 32.768 kHz RTC oscillator. Its digital subsystem centers on 24 Universal Digital Blocks (UDBs), each combining PLD logic and state machines to implement custom peripherals or standard functions like UART, SPI, LIN, or quadrature decoders.
Analog functionality includes a 1.024 V ±0.1% reference, delta-sigma ADC (8–20-bit, up to 192 ksps), four opamps (25 mA drive), four comparators (95 ns), four DACs (8-bit IDAC/VDAC), and programmable SC/CT blocks configured as PGA, TIA, or mixer - all routable to any GPIO via flexible analog interconnect.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051, up to 67 MHz - enables deterministic real-time control loops without instruction pipelining overhead. |
| Flash Memory | 64 KB, 100,000 write cycles, 20-year retention - supports field firmware updates and secure bootloader storage. |
| ADC Resolution | Delta-sigma ADC: 8–20-bit programmable, 192 ksps at 12-bit - meets high-accuracy sensor acquisition in ECU front-ends. |
| CAN Interface | Full CAN 2.0b compliant, 16 Rx + 8 Tx buffers - enables robust vehicle network node implementation without external transceiver logic. |
| Operating Temp | –40 °C to +85 °C, AEC-Q100 Grade 2 - certified for under-hood and cabin-mounted automotive applications. |
| I/O Count | 62 GPIO + 8 SIO + 2 USBIO - provides scalable routing for mixed-signal I/O, LCD direct drive (46×16), and CapSense® electrodes. |
| Power Modes | 1 µA sleep (RTC + LVD active), 200 nA hibernate (RAM retention) - extends battery life in always-on vehicle modules. |
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 | Routable to all digital/analog peripherals; supports CapSense®, LCD segment, or opamp output (non-CapSense). |
| P1[0]–P1[7] | General-purpose I/O bank 1 | Configurable as Schmitt-trigger input, open-drain, pull-up/down; supports maskable IRQ per pin. |
| USB_DP / USB_DM | USB 2.0 Full-Speed differential pair | Integrated PHY with internal oscillator - eliminates external crystal requirement for USB connectivity. |
| CAN_TX / CAN_RX | CAN 2.0b physical layer interface | Direct connection to external CAN transceiver; supports bit rates up to 1 Mbps with programmable timing. |
| VDDA / VSSA | Analog power supply/ground | Separate 1.71–5.5 V domain for ADC/DAC/PGA - isolates analog noise from digital switching. |
| XRES | External reset input | Active-low, Schmitt-triggered reset pin - enables hardware reset coordination with other ECUs. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array (24 blocks) | Enables hardware-level customization of digital logic (e.g., custom protocol engines or PWM sequencers) without FPGA cost or complexity. |
| CapSense® on Any GPIO | Supports self- and mutual-capacitance sensing across all GPIOs - simplifies touch HMI integration in instrument clusters and center consoles. |
| Digital Filter Block (DFB) | 24-bit fixed-point FIR/IIR filter engine - offloads signal processing (e.g., motor current filtering or audio preprocessing) from CPU. |
| Programmable Clock Tree | Multiple independent oscillators (IMO, ILO, WCO, PLL) with dynamic switching - ensures precise timing for USB, CAN, and ADC sampling simultaneously. |
| Secure Flash Protection | Read/write protection, row locking, and secure boot - prevents unauthorized firmware extraction or tampering in safety-critical systems. |
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 powertrains. IC Role / Device Role / Timing Role: Central signal conditioning and closed-loop control processor with synchronized ADC sampling and PWM-driven ignition timing. Use Value: Delta-sigma ADC (16-bit @ 48 ksps, 83 dB SINAD) and 67 MHz CPU enable sub-degree crank angle resolution and <1 µs jitter in spark timing generation. |
Use Scenario: Consolidation of door lock actuation, window lift control, mirror adjustment, and interior lighting into a single module. IC Role / Device Role / Timing Role: Mixed-signal hub managing analog sensor inputs (potentiometers, Hall sensors), relay/LED drivers, and LIN/CAN communication. Use Value: 62 GPIOs with configurable drive strength (25 mA sink on SIO) and integrated LIN 2.0 peripheral reduce external component count by >30% vs discrete MCU + transceivers. |
| Automotive Touch Display Controller | Battery Management System (BMS) Sensor Node |
|
Use Scenario: Capacitive touch overlay for infotainment displays exposed to glove use, moisture, and ESD in passenger cabins. IC Role / Device Role / Timing Role: Dedicated CapSense® acquisition engine with shield driver and noise immunity algorithms, coupled with USB HID interface. Use Value: On-die CapSense® with automatic baseline tracking and smart sense tuning achieves >99.5% touch detection reliability at 15 kV ESD (IEC 61000-4-2). |
Use Scenario: Voltage/current/temperature monitoring of 12S Li-ion battery packs in EV charging stations and hybrid power systems. IC Role / Device Role / Timing Role: Precision analog front-end with multiplexed delta-sigma ADC, PGA gain stages, and isolated CAN reporting. Use Value: Programmable PGA (×0.25–×16) and 1.024 V ±0.1% reference enable ±1 mV cell voltage measurement accuracy over full automotive temperature range. |
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, no integrated CapSense® or DFB; requires external ADC for >16-bit precision. | Targets ASIL-B functional safety; lacks native capacitive sensing but offers higher compute throughput for motor control. | Select when ISO 26262 ASIL-B certification and floating-point math acceleration are required over analog configurability. |
| Renesas RL78/F14 | 16-bit RL78 core, 32 MHz, integrated 10-bit SAR ADC, no CAN FD or USB; lower power in deep stop mode (300 nA). | Focused on cost-sensitive body electronics; limited analog flexibility and no USB interface. | Select for low-cost, low-complexity gateway nodes where USB/CapSense® are unnecessary and ultra-low hibernate current is critical. |
Compared with NXP S32K144 and Renesas RL78/F14, CY8C3866AXA-038 uniquely combines automotive-grade programmable analog (PGA, TIA, delta-sigma ADC), USB+CAN dual connectivity, and CapSense® in one die - reducing BOM count and enabling rapid HMI + sensor fusion prototyping without external ICs.
Availability
CY8C3866AXA-038 is available at Aetrix Electronics and suitable for engine control units, body control modules, automotive touch interfaces, and battery sensor nodes requiring stable component supply across extended automotive lifecycles.
Supply support for CY8C3866AXA-038 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 MCUs, and security solutions with broad industrial and automotive certifications.
CY8C3866AXA-038 belongs to the PSoC® 3 automotive family - designed specifically to replace discrete analog/digital components in vehicle ECUs and body electronics by integrating configurable peripherals, AEC-Q100 compliance, and development-friendly tooling (PSoC Creator™).
FAQ
Is CY8C3866AXA-038 pin-compatible with other CY8C38 family members?
Yes - CY8C3866AXA-038 uses the 100-pin TQFP package shared across CY8C3866xxx variants. Pin functions are consistent within the same package option, though peripheral enablement (e.g., USBIO, CAN) depends on specific part number configuration per the ordering table in datasheet Rev. *L, page 135.
Does CY8C3866AXA-038 require an external crystal for USB operation?
No - it integrates an internal oscillator (IMO) calibrated for USB Full-Speed (12 Mbps) compliance without external crystal. The IMO supports USB operation across –40 °C to +85 °C, eliminating BOM cost and board space for crystal and load capacitors.
What debug interfaces does CY8C3866AXA-038 support?
CY8C3866AXA-038 supports JTAG (4-wire), Serial Wire Debug (SWD, 2-wire), and Single Wire Viewer (SWV) for real-time trace. It includes eight address breakpoints, one data breakpoint, and a 4 KB instruction trace buffer - enabling full visibility into runtime behavior during automotive software validation.
Can the delta-sigma ADC operate at full 20-bit resolution across the entire voltage range?
20-bit resolution is achievable only at reduced sample rates (≤12 ksps) and requires VDDA ≥ 2.7 V. At VDDA = 1.71 V, maximum resolution drops to 16-bit per Table 11-17 in datasheet Rev. *L. Designers must validate ADC performance against actual VDDA and sampling rate requirements.
CY8C3866AXA-038 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
- 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-038 FAQ
1.How can I place an order for CY8C3866AXA-038 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXA-038 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-038 reliable?
The price and inventory of CY8C3866AXA-038 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXA-038 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXA-038?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXA-038 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXA-038?
CY8C3866AXA-038 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXA-038 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-038?
For technical support, including CY8C3866AXA-038 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXA-038 requirements.
6.How does Aetrix verify that CY8C3866AXA-038 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXA-038 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-038 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXA-038?
All CY8C3866AXA-038 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXA-038, 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-038 part is unused and in its original packaging.
Return procedure for CY8C3866AXA-038:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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