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STMicroelectronics STM8AF6286UDX
- Part No.:
- STM8AF6286UDX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
STM8AF6286UDX.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 32VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,247
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Product details
Overview
STM8AF6286UDX from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit microcontroller featuring a 24 MHz STM8A core, 64 Kbyte Flash program memory, 2 Kbyte data EEPROM, 10-bit ADC with 16-channel multiplexing, and integrated CAN 2.0B interface - deployed in engine control units for real-time sensor signal acquisition and actuator command execution.
For engineers reviewing the STM8AF6286UDX datasheet, STM8AF6286UDX pinout, STM8AF6286UDX application, or STM8AF6286UDX equivalent, this page delivers verified technical context, validated pin functions, automotive-grade operating parameters (–40 °C to 150 °C), and confirmed alternative MCU options for CAN-enabled powertrain subsystems.
Technical Context
The STM8AF6286UDX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, enabling 10 MIPS at 16 MHz. It integrates dual 16-bit general-purpose timers (TIM2/TIM3), one advanced control timer (TIM1) with dead-time insertion and complementary outputs, and a dedicated auto-wakeup timer for low-power operation.
Its communication stack includes high-speed CAN 2.0B (1 Mbit/s), LINUART compliant with LIN 2.2 (master/slave with automatic resynchronization), USART with synchronous clock output, SPI up to 10 Mbit/s, and I²C up to 400 Kbit/s - all supported by hardware-level clock security system (CSS) and nested interrupt controller with 32 vectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic timing for automotive control loops. |
| Max fCPU | 24 MHz; supports real-time response in safety-critical engine management applications. |
| Flash Memory | 64 Kbyte; retains code for 20 years at 55 °C - suitable for long-lifecycle automotive deployments. |
| Data EEPROM | 2 Kbyte; rated for 300 kwrite cycles - used for calibration storage and fault log retention. |
| ADC Resolution | 10-bit with ±2 LSB total unadjusted error; provides sufficient dynamic range for throttle position and temperature sensing. |
| CAN Interface | CAN 2.0B compliant, 1 Mbit/s; enables robust communication with ECU clusters in distributed vehicle networks. |
| Operating Temp | –40 °C to +150 °C; meets under-hood thermal requirements for gasoline/diesel powertrain modules. |
| Supply Voltage | 3.0 V to 5.5 V; accommodates wide battery voltage variation during cranking and alternator regulation. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced heat dissipation in high-temperature engine bay environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main supply input | Accepts 3.0–5.5 V; powers core, peripherals, and I/O banks - requires local 100 nF decoupling per VDD pin. |
| VSS | Ground reference | System ground return; multiple pins ensure low-impedance path for noise-sensitive analog and digital domains. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external watchdog or power monitor ICs. |
| PA0–PA7 | General-purpose I/O | Up to 8-bit port A with high-sink capability (20 mA); configurable as ADC inputs or CAN TX/RX alternate functions. |
| PB0–PB7 | General-purpose I/O | Port B supports TIM1/2/3 channel capture/compare and LINUART functionality - critical for motor control timing. |
| PC0–PC7 | General-purpose I/O | Port C includes CAN RX/TX pins (PC3/PC4); must be routed with controlled impedance for EMC compliance. |
| PD0–PD7 | General-purpose I/O | Port D provides SPI (PD3–PD6), I²C (PD5/PD6), and USART (PD5/PD6) functions - shared pin mapping requires careful peripheral enable sequencing. |
| PE0–PE7 | General-purpose I/O | Port E supports ADC channels (PE0–PE7), TIM4, and SWIM debug interface - used for sensor front-end signal conditioning. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for 150 °C junction temperature operation - required for direct-mount engine control module placement. |
| Integrated CAN 2.0B controller | Hardware-based message filtering and FIFO buffering - reduces CPU load during high-bandwidth bus traffic. |
| True data EEPROM (2 Kbyte) | Independent erase/write cycles without Flash wear-out - preserves calibration data across firmware updates. |
| Advanced control timer (TIM1) | 4 CAPCOM channels with dead-time insertion and complementary outputs - enables precise 3-phase motor gate drive. |
| Low-power crystal oscillator | Supports external 32.768 kHz crystal for RTC and wake-up timing - maintains timekeeping during Halt mode with <1 µA current draw. |
| SWIM single-wire debug interface | Enables full in-circuit debugging and programming via one pin - simplifies PCB layout and reduces test point count. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Real-time processing of crankshaft position, camshaft timing, and oxygen sensor signals to compute fuel injection timing and spark advance. IC Role / Device Role / Timing Role: Primary controller executing closed-loop combustion control algorithms with sub-millisecond interrupt latency. Use Value: Integrated 10-bit ADC and CAN interface eliminate external signal conditioning and bus transceivers - reducing BOM cost and board area. | Use Scenario: Monitoring gear selector position, turbine speed, and hydraulic pressure to manage solenoid valve actuation and clutch engagement timing. IC Role / Device Role / Timing Role: Deterministic timer-driven PWM generation for proportional pressure control valves with synchronized CAN status reporting. Use Value: TIM1's dead-time insertion and complementary outputs directly drive half-bridge gate drivers - eliminating discrete logic and improving reliability. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Managing door lock actuators, window lift motors, and interior lighting based on LIN cluster commands and sensor inputs. IC Role / Device Role / Timing Role: LIN master node coordinating slave devices while maintaining local PWM dimming control for LED lighting. Use Value: LINUART hardware support ensures bit-level resynchronization tolerance - critical for stable communication over noisy vehicle wiring harnesses. | Use Scenario: Processing torque sensor feedback and motor phase currents to generate field-oriented control (FOC) commands for brushless assist motor. IC Role / Device Role / Timing Role: High-resolution ADC sampling and fast PWM update via TIM1 - enabling 20 kHz motor switching with minimal jitter. Use Value: 150 °C operating temperature rating allows direct integration into EPS motor housing - avoiding external heatsinking and thermal interface materials. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive 8-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF6269UDX | 32 Kbyte Flash, no CAN interface; identical package and peripheral set otherwise. | Suitable for non-networked body electronics where LIN-only communication suffices. | Select when CAN is unnecessary and cost reduction is prioritized over future network scalability. |
| STM32F042F6P6 | 32-bit ARM Cortex-M0 core, 32 Kbyte Flash, USB 2.0, no CAN; operates up to 85 °C only. | Applicable in lower-temperature cabin modules requiring USB connectivity or higher computational throughput. | Choose only if 32-bit performance, USB, or smaller footprint outweighs CAN requirement and extended temperature needs. |
Compared with STM8AF6269UDX, the STM8AF6286UDX adds 32 Kbyte Flash and CAN - essential for scalable ECU designs; versus STM32F042F6P6, it trades 32-bit capability for guaranteed 150 °C operation and native CAN - making it irreplaceable in under-hood powertrain roles.
Availability
STM8AF6286UDX is available at Aetrix Electronics and suitable for engine control units, transmission control modules, electric power steering systems, and body control modules requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF6286UDX 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade ASSPs since 1987.
The STM8A automotive MCU product line targets cost-sensitive, high-reliability powertrain and chassis applications - delivering AEC-Q100 qualified 8-bit performance with integrated CAN, LIN, and high-temperature resilience.
FAQ
What is the maximum operating temperature specification for STM8AF6286UDX?
The STM8AF6286UDX is qualified to AEC-Q100 Grade 0 with a guaranteed operating junction temperature range of –40 °C to +150 °C. This specification is validated per STMicroelectronics' production test flow and documented in the device's official datasheet (DocID14395 Rev 15, Section 10.3). It enables direct mounting in high-heat zones such as engine compartments without derating.
Does STM8AF6286UDX include hardware CAN controller support?
Yes, the STM8AF6286UDX integrates a fully compliant CAN 2.0B controller supporting bit rates up to 1 Mbit/s. It features message filtering, transmit/receive FIFOs, and automatic retransmission - all implemented in hardware without CPU intervention. Pin assignments PC3 (CAN_RX) and PC4 (CAN_TX) are fixed and require external CAN transceiver connection.
How many I/O pins does STM8AF6286UDX provide in LQFP64 package?
The STM8AF6286UDX in LQFP64 package provides 52 user-programmable I/O pins across five ports (PA–PE), excluding power, reset, and debug pins. Port A through E each offer 8 pins, but some are multiplexed with analog inputs, timer channels, or communication interfaces - actual usable GPIO count depends on peripheral configuration per application.
Is SWIM debug interface supported on STM8AF6286UDX?
Yes, the STM8AF6286UDX supports the Single Wire Interface Module (SWIM) debug protocol using pin PD3. This allows full in-circuit programming, breakpoint setting, register inspection, and memory read/write via ST-LINK/V2 or compatible debuggers - with no additional pins required beyond the standard SWIM signal and ground connection.
STM8AF6286UDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- STM8A
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 6K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 7x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6286UDX FAQ
1.How can I place an order for STM8AF6286UDX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6286UDX 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 STM8AF6286UDX reliable?
The price and inventory of STM8AF6286UDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6286UDX is usually 5 days.
3.What payment methods are accepted for STM8AF6286UDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6286UDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6286UDX?
STM8AF6286UDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6286UDX 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 STM8AF6286UDX?
For technical support, including STM8AF6286UDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6286UDX requirements.
6.How does Aetrix verify that STM8AF6286UDX is sourced from the original manufacturer or authorized distributors?
All STM8AF6286UDX 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 STM8AF6286UDX meets industry standards.
7.What is the process for return or replacement of STM8AF6286UDX?
All STM8AF6286UDX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6286UDX, 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 STM8AF6286UDX part is unused and in its original packaging.
Return procedure for STM8AF6286UDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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