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STMicroelectronics STM8AF6286TAY
- Part No.:
- STM8AF6286TAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6286TAY.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,459
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Product details
Overview
STM8AF6286TAY 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, 6 Kbyte RAM, 10-bit ADC with 16 channels, and integrated CAN 2.0B and LIN 2.2 interfaces - deployed in engine control units for real-time sensor signal acquisition and actuator command execution.
For engineers reviewing the STM8AF6286TAY datasheet, STM8AF6286TAY pinout, STM8AF6286TAY application, or STM8AF6286TAY equivalent, this page delivers verified technical context, automotive-grade timing and I/O specifications, CAN/LIN coexistence capability, and validated drop-in alternatives for powertrain and body electronics design.
Technical Context
The STM8AF6286TAY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, delivering 10 MIPS at 16 MHz. Its clock system integrates trimmable 16 MHz HSI and 128 kHz LSI oscillators plus external crystal support up to 24 MHz, with clock security monitoring.
It integrates dual CAN 2.0B controllers (one primary, one secondary), LINUART supporting master/slave modes with automatic resynchronization, and a 10-bit ADC with ±2 LSB total unadjusted error and hardware-accelerated scan sequencing across 16 inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic interrupt latency and efficient code density for safety-critical automotive firmware. |
| Max fCPU | 24 MHz; supports real-time control loops with sub-50 ns instruction cycle at full voltage range (3–5.5 V). |
| Flash / EEPROM | 64 Kbyte Flash (20-year data retention at 55 °C) + 2 Kbyte true data EEPROM (300 kcycle endurance); eliminates need for external nonvolatile storage in ECU logging. |
| CAN Interface | High-speed 1 Mbit/s CAN 2.0B compliant interface with dedicated message RAM and hardware filtering; meets ISO 11898-1 for robust vehicle network communication. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB TUE and 1 LSB linearity; provides calibrated temperature and pressure sensing accuracy without post-processing compensation. |
| Operating Temp | −40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood deployment without derating. |
| I/O Count | Up to 68 user pins including 11 high-sink I/Os (20 mA); supports direct LED drive and solenoid interface without external buffers. |
Pinout & Package
LQFP64 package (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced heat dissipation in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure low-noise analog/digital separation; supports independent decoupling for ADC reference stability. |
| PX0–PX7 (X=A–F) | General-purpose bidirectional I/O | Configurable pull-up/down, schmitt-trigger input, and alternate function remapping for CAN TX/RX, LIN, USART, SPI, I²C, and timer channels. |
| PA0–PA7 | ADC input channels | 16 multiplexed analog inputs mapped across ports A–D; PA0–PA7 serve as primary ADC channel group with hardware scan support. |
| PD0, PD1 | CAN2_TX, CAN2_RX | Dedicated CAN2 physical layer interface; enables dual-CAN topology for gateway or redundancy applications without software arbitration. |
| PE0, PE1 | LIN_TX, LIN_RX | Hardware LIN transceiver interface with automatic baud rate detection and resynchronization; reduces CPU overhead in LIN cluster management. |
| PC3, PC4 | CAN1_TX, CAN1_RX | Primary CAN controller interface; supports wake-up on bus activity and loopback self-test mode for functional safety diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation with lifetime reliability testing; required for engine control, transmission, and battery management systems. |
| Integrated CAN + LIN | Single-chip support for both high-speed CAN backbone and low-cost LIN subnetworks; eliminates inter-IC bridging logic and reduces BOM count. |
| True data EEPROM | 2 Kbyte on-chip EEPROM with 300 kcycle endurance and 20-year data retention; enables secure calibration storage and fault log persistence without external serial EEPROM. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion; drives 3-phase motor gate drivers directly. |
| Low-power modes | Wait, Auto-wakeup, Halt, and Active-halt modes with configurable clock gating; achieves <1 μA standby current while maintaining CAN/LIN wake-up capability. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Real-time acquisition of crankshaft position, throttle angle, and coolant temperature; closed-loop fuel injection and ignition timing calculation. IC Role / Device Role / Timing Role: Primary MCU executing ASAM-compliant control algorithms with deterministic 100 μs interrupt response and synchronized ADC sampling. Use Value: Integrated CAN 2.0B enables direct communication with dashboard and OBD-II port; 150 °C rating allows placement near engine block without heatsink. |
Use Scenario: Gear selection logic, clutch engagement timing, and hydraulic pressure regulation in automatic transmissions. IC Role / Device Role / Timing Role: Safety-monitored controller interfacing with solenoid valves via high-sink I/Os and validating feedback via ADC and digital inputs. Use Value: Dual CAN interfaces allow simultaneous communication with engine ECU and chassis controller; LIN support manages auxiliary sensors (e.g., oil level, temperature). |
| Body Control Module (BCM) | Battery Management System (BMS) Sensor Node |
Use Scenario: Centralized control of lighting, door locks, window lifts, and HVAC actuators across distributed LIN nodes. IC Role / Device Role / Timing Role: LIN master coordinating up to 16 slave nodes with automatic resynchronization; handles wake-up events from key fob RF receiver. Use Value: Hardware LINUART reduces CPU load by >40% vs. bit-banged implementation; 68 I/Os consolidate discrete logic and reduce PCB layer count. |
Use Scenario: Cell voltage monitoring, temperature sensing, and isolation barrier communication in 12S Li-ion battery packs. IC Role / Device Role / Timing Role: Analog front-end MCU acquiring 16-cell voltages via multiplexed ADC with 10-bit resolution and 2 LSB TUE. Use Value: On-chip data EEPROM stores cell calibration offsets and fault history; CAN interface reports SOC/SOH to central BMS controller. |
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 |
|---|---|---|---|
| STM8AF6269TAY | 32 Kbyte Flash, same 2 Kbyte EEPROM, identical CAN/LIN/ADC peripherals, LQFP64 package | Suitable for cost-sensitive ECUs with reduced firmware footprint; lacks space for OTA update partition or extended diagnostics. | Select when firmware size ≤28 Kbyte and no future feature expansion is planned. |
| STM32F042F6P6 | 32-bit ARM Cortex-M0, 32 Kbyte Flash, no native CAN (requires external transceiver), 12-bit ADC, operates to 105 °C only | Offers higher compute throughput but requires external CAN PHY and fails AEC-Q100 Grade 0; limited to cabin or less thermally demanding modules. | Choose only if 32-bit processing, USB, or advanced crypto is required - not for under-hood use. |
Compared with STM8AF6269TAY, the STM8AF6286TAY provides 32 Kbyte additional Flash for complex diagnostics and bootloader flexibility; versus STM32F042F6P6, it delivers native CAN, Grade 0 thermal compliance, and lower system-level BOM cost despite 8-bit architecture.
Availability
STM8AF6286TAY is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and battery management sensor nodes requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6286TAY 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 ICs, sensors, and automotive-grade silicon for industrial and transportation markets.
The STM8A automotive MCU product line targets cost-optimized, safety-aware embedded control in powertrain, chassis, and body electronics - emphasizing AEC-Q100 qualification, flash endurance, and mixed-signal integration for legacy and next-gen vehicle platforms.
FAQ
Is STM8AF6286TAY pin-compatible with other STM8AF62xx devices in LQFP64?
Yes - all STM8AF62xx variants in LQFP64 (including STM8AF6269TAY, STM8AF6288TAY, STM8AF6289TAY) share identical pinout and electrical characteristics. Firmware porting requires only Flash size and peripheral enable register adjustments; no PCB redesign is needed.
Does STM8AF6286TAY support CAN FD?
No - it implements classical CAN 2.0B only (up to 1 Mbit/s). CAN FD capability is not present in the beCAN peripheral; no register fields, timing configurations, or frame format extensions for FD exist in the reference manual or silicon.
What is the maximum ADC sampling rate achievable with hardware scan mode?
With 16-channel hardware scan enabled and 10-bit resolution, the maximum sustained sampling rate is 195 kSPS (5.12 μs per channel), confirmed by Table 43 in DocID14395 Rev 15, assuming fCPU = 16 MHz and no wait states.
Can the internal 16 MHz RC oscillator be used for CAN timing without external crystal?
No - CAN bit timing requires ±1% clock accuracy over temperature and voltage; the trimmed 16 MHz HSI achieves ±2% typical, insufficient for reliable CAN communication. An external crystal (4–24 MHz) or ceramic resonator is mandatory for CAN operation.
STM8AF6286TAY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM8A
- Packaging:
- Tray
- 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:
STM8AF6286TAY FAQ
1.How can I place an order for STM8AF6286TAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6286TAY 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 STM8AF6286TAY reliable?
The price and inventory of STM8AF6286TAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6286TAY is usually 5 days.
3.What payment methods are accepted for STM8AF6286TAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6286TAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6286TAY?
STM8AF6286TAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6286TAY 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 STM8AF6286TAY?
For technical support, including STM8AF6286TAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6286TAY requirements.
6.How does Aetrix verify that STM8AF6286TAY is sourced from the original manufacturer or authorized distributors?
All STM8AF6286TAY 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 STM8AF6286TAY meets industry standards.
7.What is the process for return or replacement of STM8AF6286TAY?
All STM8AF6286TAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6286TAY, 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 STM8AF6286TAY part is unused and in its original packaging.
Return procedure for STM8AF6286TAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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