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STMicroelectronics STM8AF6286TAX
- Part No.:
- STM8AF6286TAX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6286TAX.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,032
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Product details
Overview
STM8AF6286TAX 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 channels, CAN 2.0B interface, LINUART, and operation up to 150 °C - deployed in engine control units and body electronics modules.
For engineers reviewing the STM8AF6286TAX datasheet, STM8AF6286TAX pinout, STM8AF6286TAX application, or STM8AF6286TAX equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and communication specifications, and real-world substitution guidance for ECU design and qualification.
Technical Context
The STM8AF6286TAX 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 clock domains: a user-trimmable 16 MHz HSI RC oscillator and a 128 kHz LSI RC oscillator, both monitored by a dedicated clock security system (CSS) for fail-safe operation.
Its peripheral set includes a high-speed CAN 2.0B controller (1 Mbit/s), LINUART compliant with LIN 2.2 (master/slave with auto-resynchronization), and three independent timers - two 16-bit general-purpose timers plus one advanced control timer with dead-time insertion and complementary outputs - all supporting automotive motor control and sensor interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic interrupt latency and efficient code density for safety-critical firmware. |
| Max fCPU | 24 MHz at VDD = 3–5.5 V; supports real-time response in engine management and transmission control loops. |
| Flash Memory | 64 Kbyte Flash with 20-year data retention at 55 °C; sufficient for complex automotive firmware with OTA update partitioning. |
| Data EEPROM | 2 Kbyte true data EEPROM with 300 kcycle endurance; retains calibration data, fault logs, and configuration across vehicle lifetime. |
| CAN Interface | CAN 2.0B compliant at up to 1 Mbit/s; meets ISO 11898-1 for robust in-vehicle networking in powertrain and chassis systems. |
| ADC Resolution | 10-bit SAR ADC with ±2 LSB total unadjusted error (TUE); provides accurate sensor signal acquisition for temperature, pressure, and throttle position. |
| Operating Temp | −40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood deployment without derating. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced for automotive under-hood thermal cycling; 64-pin layout supports full CAN/LIN/USART/SPI/I²C peripheral routing with dedicated VCAP and NRST pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation; VCAP pin requires external 1 µF ceramic capacitor for internal regulator stability. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external watchdog or power-on reset assertion with programmable sensitivity. |
| PX0–PX7 (X=A–E) | General-purpose I/Os | Up to 68 user pins including 11 high-sink I/Os (20 mA); immune to current injection per ISO 10605 for EMC robustness. |
| PD0/PD1 | CAN TX/RX | Dedicated differential CAN bus interface pins; support direct connection to ISO 11898-compliant transceivers without level-shifting. |
| PA2/PA3 | LINUART TX/RX | Hardware LIN physical layer interface; supports automatic resynchronization and LIN 2.2 master/slave frame generation. |
| PC0–PC3 | ADC IN0–IN3 | Analog input channels with internal sampling capacitor; routed to 10-bit ADC with selectable prescaler and trigger sources. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 0 certified - validated for −40 °C to +150 °C operation and automotive reliability stress testing. |
| Low-Power Modes | Wait, Auto-wakeup, Halt, and Active-halt modes with configurable clock gating; reduces current to <1 µA in Halt mode for battery-sensitive modules. |
| Advanced Timer | 16-bit TIM1 with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - enables 3-phase motor control without external logic. |
| Communication Flexibility | Single USART with synchronous clock output + LINUART + SPI (10 Mbit/s) + I²C (400 kbit/s) - supports mixed-protocol diagnostics and sensor fusion. |
| Memory Protection | Read-out protection (ROP), write protection (WP), and user boot code (UBC) lock bits - enforce firmware IP security and bootloader integrity. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time fuel injection timing, spark advance calculation, and OBD-II diagnostics in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop control algorithms with sub-10 µs interrupt latency and synchronized PWM outputs. Use Value: 24 MHz fCPU and advanced timer with dead-time insertion enable precise ignition timing and injector pulse-width modulation at full engine RPM. |
Use Scenario: Centralized lighting, door lock, window lift, and HVAC control in passenger compartments. IC Role / Device Role / Timing Role: System coordinator managing LIN slave nodes (e.g., mirror controls, seat modules) and CAN gateway functions. Use Value: Integrated LINUART and CAN reduce BOM count; 150 °C rating allows placement near fuse boxes or junction boxes without heatsinking. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
|
Use Scenario: Gear selection logic, clutch engagement control, and torque converter lock-up management in automatic transmissions. IC Role / Device Role / Timing Role: Safety-relevant controller with ASIL-B capability via hardware CRC, memory parity, and clock monitoring. Use Value: Clock security system (CSS) and nested interrupt controller with 32 vectors ensure deterministic response to critical CAN messages during gear shifts. |
Use Scenario: Torque assist computation, motor phase commutation, and fault detection in brushless DC steering motors. IC Role / Device Role / Timing Role: Motor control MCU generating 3-phase PWM with synchronized ADC sampling of current sensors. Use Value: TIM1's complementary outputs with dead-time prevent shoot-through; 10-bit ADC with 16-channel mux supports dual shunt current sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF6269TAY | 32 Kbyte Flash, same 64-pin LQFP package and peripheral set; lacks 32 Kbyte additional Flash and associated memory-mapped registers. | Suitable for simpler BCM or sensor nodes where firmware size ≤32 KB; not recommended for full ECU implementations requiring dual-bank updates. | Select when cost sensitivity outweighs future firmware scalability needs and no LIN/CAN coexistence is required beyond basic messaging. |
| STM32F042F6P6 | 32-bit ARM Cortex-M0 core, 32 Kbyte Flash, no native CAN but supports CAN via external transceiver; higher DMIPS but no AEC-Q100 Grade 0 rating. | Applicable in non-safety-critical cabin modules (e.g., infotainment interfaces); requires external CAN PHY and lacks 150 °C qualification. | Choose only for designs targeting migration path to 32-bit, where Grade 0 qualification is waived and CAN is implemented externally. |
Compared with STM8AF6269TAY, the STM8AF6286TAX provides double Flash capacity and extended EEPROM for complex calibration storage; versus STM32F042F6P6, it delivers guaranteed automotive Grade 0 operation and integrated CAN/LIN without external components - critical for production ECU validation.
Availability
STM8AF6286TAX is available at Aetrix Electronics and suitable for engine control units, body control modules, transmission control units, and electric power steering systems requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF6286TAX 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 devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
The STM8A automotive MCU product line targets cost-sensitive, high-reliability embedded control applications - specifically engineered for under-hood environments with extreme temperature, voltage, and EMC requirements.
FAQ
What is the maximum operating temperature and qualification standard for STM8AF6286TAX?
The STM8AF6286TAX is rated for −40 °C to +150 °C ambient operation and fully qualified to AEC-Q100 Grade 0 standards, including stress tests for temperature cycling, humidity, and ESD. This certification covers the entire die, package, and bond wire assembly - confirmed in ST's official qualification report DocID14395 Rev 15.
Does STM8AF6286TAX support hardware-based LIN communication without external transceivers?
No - the STM8AF6286TAX integrates a LINUART peripheral that handles protocol framing, checksum, and auto-resynchronization, but requires an external LIN transceiver (e.g., TLE7259-3GE) for physical layer compliance with ISO 17987-4. The PA2/PA3 pins provide UART-level signals only.
How many CAN message objects does the on-chip beCAN controller support?
The beCAN controller supports 16 message objects with full mailbox arbitration, configurable acceptance filtering, and transmit/receive FIFOs. Each object includes ID masking, data length control, and status flags - documented in Section 5.9.5 of the datasheet (DocID14395 Rev 15, p.26).
Is the 2 Kbyte data EEPROM accessible during program execution?
Yes - the 2 Kbyte data EEPROM supports concurrent read-while-write (RWW) operation: code execution from Flash continues uninterrupted during EEPROM write/erase cycles. This is enabled by separate memory buses and verified in electrical characteristics Table 37 (DocID14395 Rev 15, p.73).
STM8AF6286TAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6286TAX FAQ
1.How can I place an order for STM8AF6286TAX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6286TAX 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 STM8AF6286TAX reliable?
The price and inventory of STM8AF6286TAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6286TAX is usually 5 days.
3.What payment methods are accepted for STM8AF6286TAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6286TAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6286TAX?
STM8AF6286TAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6286TAX 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 STM8AF6286TAX?
For technical support, including STM8AF6286TAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6286TAX requirements.
6.How does Aetrix verify that STM8AF6286TAX is sourced from the original manufacturer or authorized distributors?
All STM8AF6286TAX 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 STM8AF6286TAX meets industry standards.
7.What is the process for return or replacement of STM8AF6286TAX?
All STM8AF6286TAX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6286TAX, 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 STM8AF6286TAX part is unused and in its original packaging.
Return procedure for STM8AF6286TAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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