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STMicroelectronics STM8AF5286UDY
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- Part No.:
- STM8AF5286UDY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
STM8AF5286UDY.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 32VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,920
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Product details
Overview
STM8AF5286UDY from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit MCU 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 (1 Mbit/s), LIN 2.2, USART, SPI, and I²C interfaces. It operates across -40 °C to 150 °C and supports high-reliability engine control unit (ECU) applications.
For engineers reviewing the STM8AF5286UDY datasheet, STM8AF5286UDY pinout, STM8AF5286UDY application, or STM8AF5286UDY equivalent, this page delivers verified technical context, package-specific pin functions, automotive-grade timing and interface specifications, and validated alternative options for ECU, body control module, and powertrain subsystem design.
Technical Context
The STM8AF5286UDY implements a Harvard-architecture STM8A core 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 16-bit general-purpose timers (each with up to 3 CAPCOM channels), an advanced control timer with dead-time insertion and complementary outputs, and a dedicated auto-wakeup timer. The CAN 2.0B peripheral supports full mailbox management and error handling compliant with ISO 11898-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time execution in safety-critical automotive firmware. |
| Max fCPU | 24 MHz at VDD = 3–5.5 V; supports high-speed sensor sampling and actuator response in engine management systems. |
| Flash Memory | 64 Kbyte Flash with 20-year data retention at 55 °C; sufficient for complex ECU bootloaders and calibration tables. |
| Data EEPROM | 2 Kbyte true data EEPROM with 300 kcycle endurance; enables robust storage of odometer, fault logs, and adaptive learning parameters. |
| CAN Interface | CAN 2.0B compliant, 1 Mbit/s operation; meets automotive network requirements for powertrain communication with built-in message filtering and FIFO buffering. |
| ADC Resolution | 10-bit SAR ADC with ±2 LSB total unadjusted error and 16 multiplexed inputs; suitable for precision analog sensing of throttle position, coolant temperature, and oxygen sensors. |
| Operating Temp | -40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood deployment without derating. |
Pinout & Package
LQFP64 10×10 mm package with exposed thermal pad; RoHS-compliant, automotive-grade molding compound rated for 150 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD pins (Pins 1, 64) and multiple VSS (Pins 2, 3, 63) ensure low-impedance power delivery and noise immunity in noisy automotive environments. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/O ports | 64-pin variant provides up to 56 user I/Os; 11 pins support high-sink capability (20 mA) for direct LED/relay drive without external buffers. |
| PD0/PD1 | CAN TX/RX | Dedicated differential CAN transceiver interface pins; internally routed to beCAN peripheral with programmable slew rate control. |
| PA3/PA4 | LIN UART TX/RX | Hardware LIN 2.2-compliant transceiver pins supporting master/slave mode and automatic resynchronization for body electronics networks. |
| PC3/PC4 | SPI SCK/MOSI | Full-duplex SPI interface capable of 10 Mbit/s or fMASTER/2; used for flash programming, sensor daisy-chaining, and EEPROM communication. |
| PC5/PC6 | I²C SCL/SDA | Standard-mode (100 kbit/s) and fast-mode (400 kbit/s) I²C interface with internal pull-ups; connects to EEPROM, temperature sensors, and PMICs. |
| NRST | Active-low reset input | Asynchronous reset pin with Schmitt trigger; supports external watchdog reset and power-on reset sequencing per ISO 16750-2. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Control Timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and hardware dead-time insertion - enables precise 3-phase motor gate driving in EPS or HVAC blower modules. |
| Embedded CAN 2.0B Controller | Full CAN protocol stack offload including message filtering, transmit/receive FIFOs, and bus-off recovery - reduces CPU load in multi-node powertrain networks. |
| True Data EEPROM | 2 Kbyte on-chip EEPROM with 300 kcycle endurance and independent erase/write operations - eliminates need for external serial EEPROM in cost-sensitive ECUs. |
| Low-Power Modes | Wait, Auto-Wakeup, and Halt modes with configurable clock gating; achieves <1 µA halt current at 25 °C - extends battery life in always-on vehicle modules. |
| Robust I/O Design | I/Os immune to current injection up to 100 mA; meets ISO 11452-4 for conducted transient immunity - ensures reliability in 12 V/24 V automotive electrical systems. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time processing of crankshaft/camshaft position, air/fuel ratio, and knock sensor signals in gasoline/diesel engines. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop fuel injection and ignition timing algorithms with sub-microsecond interrupt latency. Use Value: Integrated 10-bit ADC with hardware oversampling and CAN 2.0B enable deterministic sensor fusion and actuator command distribution across the powertrain network. |
Use Scenario: Centralized management of door locks, window lifts, lighting, and interior climate controls in passenger vehicles. IC Role / Device Role / Timing Role: System controller coordinating LIN slave nodes (e.g., mirror motors, seat position sensors) via hardware LINUART. Use Value: On-chip LIN 2.2 compliance with automatic resynchronization eliminates external LIN transceivers and reduces BOM count by one IC per node. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
Use Scenario: Monitoring gear position sensors, turbine speed, and hydraulic pressure to manage shift logic and torque converter lock-up. IC Role / Device Role / Timing Role: Safety-oriented MCU interfacing with dual-redundant sensors and communicating via CAN to ECU and instrument cluster. Use Value: AEC-Q100 Grade 0 qualification and 150 °C operating range ensure uninterrupted operation in transmission oil-cooled enclosures. |
Use Scenario: Closed-loop control of brushless DC motor torque and position in column-assist or rack-assist EPS systems. IC Role / Device Role / Timing Role: Motor controller managing PWM generation, current sensing, and fault detection using TIM1's complementary outputs and dead-time insertion. Use Value: Hardware-accelerated advanced timer eliminates software-based dead-time compensation, improving motor efficiency and reducing thermal stress on MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF5288UDY | 128 Kbyte Flash, same peripherals and package; higher memory density for larger firmware images and OTA update partitions. | Preferred for next-gen ECUs requiring dual-bank flash for safe firmware updates without runtime interruption. | Select when >64 Kbyte code space is required and pin compatibility with LQFP64 must be preserved. |
| STM32F042F6P6 | 32-bit ARM Cortex-M0 core, 32 Kbyte Flash, no native CAN; requires external CAN transceiver and lacks AEC-Q100 Grade 0 rating. | Suitable for non-safety-critical body electronics where cost optimization outweighs automotive qualification requirements. | Choose only for cost-sensitive, non-under-hood applications where CAN is optional and 150 °C operation is not needed. |
Compared with STM8AF5288UDY, the STM8AF5286UDY trades Flash capacity for lower cost and smaller footprint while retaining identical peripheral set and qualification. Against STM32F042F6P6, it offers native CAN, higher temperature grade, and proven 8-bit deterministic timing - critical for ASIL-B–aligned powertrain functions.
Availability
STM8AF5286UDY is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF5286UDY 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-optimized, high-reliability embedded control in engine management, transmission, chassis, and body electronics - emphasizing AEC-Q100 qualification, extended temperature operation, and functional safety readiness.
FAQ
What is the maximum operating frequency of the STM8AF5286UDY at 5.5 V?
The STM8AF5286UDY achieves a maximum CPU frequency of 24 MHz across its full supply voltage range (3.0–5.5 V). At 5.5 V, this frequency is fully supported without derating, enabling optimal performance for time-critical automotive tasks such as spark advance calculation and injector pulse-width modulation.
Does the STM8AF5286UDY include hardware support for LIN communication?
Yes, the STM8AF5286UDY integrates a dedicated LINUART peripheral compliant with LIN 2.2 specification. It supports both master and slave modes with automatic resynchronization, break detection, and checksum handling - eliminating the need for external LIN transceivers in body electronics applications.
How many CAN message objects does the beCAN peripheral support?
The beCAN controller in the STM8AF5286UDY supports 16 message objects with configurable identifiers and masks, organized into three mailboxes (two transmit, one receive) and a 16-entry FIFO buffer. This architecture enables efficient handling of mixed priority messages in multi-node automotive networks.
Is the STM8AF5286UDY pin-compatible with other members of the STM8AF52xx family?
Yes, the STM8AF5286UDY in LQFP64 is pin-compatible with STM8AF5268UDY, STM8AF5269UDY, STM8AF5288UDY, and STM8AF5289UDY within the same package variant. Pin functions, power domains, and peripheral mappings remain consistent - enabling scalable memory upgrades without PCB redesign.
STM8AF5286UDY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- CANbus, I2C, LINbus, 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 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF5286UDY FAQ
1.How can I place an order for STM8AF5286UDY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF5286UDY 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 STM8AF5286UDY reliable?
The price and inventory of STM8AF5286UDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF5286UDY is usually 5 days.
3.What payment methods are accepted for STM8AF5286UDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF5286UDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF5286UDY?
STM8AF5286UDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF5286UDY 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 STM8AF5286UDY?
For technical support, including STM8AF5286UDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF5286UDY requirements.
6.How does Aetrix verify that STM8AF5286UDY is sourced from the original manufacturer or authorized distributors?
All STM8AF5286UDY 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 STM8AF5286UDY meets industry standards.
7.What is the process for return or replacement of STM8AF5286UDY?
All STM8AF5286UDY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF5286UDY, 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 STM8AF5286UDY part is unused and in its original packaging.
Return procedure for STM8AF5286UDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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