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STMicroelectronics STM8AF6286TCY
- Part No.:
- STM8AF6286TCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6286TCY.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,481
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Product details
Overview
STM8AF6286TCY 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. It operates from 3 to 5.5 V across –40 °C to 150 °C and supports LIN 2.2-compliant communication via dedicated LINUART peripheral - deployed in engine control units and body electronics modules requiring high-temperature reliability.
For engineers reviewing the STM8AF6286TCY datasheet, STM8AF6286TCY pinout, STM8AF6286TCY application, or STM8AF6286TCY equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and power specifications, and real-world use-case mappings for ECU design, LIN/CAN gateway implementation, and safety-critical sensor interface development.
Technical Context
The STM8AF6286TCY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average execution efficiency, enabling 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, all monitored by a dedicated clock security system (CSS).
It features a dual-timer architecture: two general-purpose 16-bit timers (TIM2/TIM3) each with three CAPCOM channels, and an advanced control timer (TIM1) supporting dead-time insertion, complementary outputs, and synchronization - essential for motor control and power stage sequencing in automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic real-time response in safety-critical automotive firmware. |
| Max fCPU | 24 MHz at VDD ≥ 4.5 V; supports high-speed control loops in engine management and transmission systems. |
| Flash Memory | 64 Kbyte program Flash with 20-year data retention at 55 °C; sufficient for complex bootloader + application partitioning. |
| Data EEPROM | 2 Kbyte true data EEPROM with 300 kcycle endurance; stores calibration data, odometer values, and fault logs without external NV memory. |
| ADC Resolution | 10-bit SAR ADC with ±2 LSB total unadjusted error and 1 LSB linearity; meets precision requirements for temperature, pressure, and throttle position sensing. |
| CAN Interface | High-speed 1 Mbit/s CAN 2.0B controller with dedicated message RAM and automatic retransmission; enables robust vehicle network node operation. |
| Operating Temp | –40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood applications including ignition control and exhaust gas recirculation. |
| I/O Count | Up to 68 user pins in LQFP80 package; STM8AF6286TCY uses LQFP64 with 51 I/Os including 11 high-sink capable pins for direct LED/relay drive. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, automotive-qualified lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3–5.5 V supply rail; requires local 100 nF decoupling and VCAP capacitor per datasheet Section 10.3.1. |
| VSS | Ground reference | Digital ground return; separate analog ground (VSSA) required for ADC accuracy below 1 LSB linearity error. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external reset IC or microcontroller supervisory signal with 2.5 µs minimum pulse width. |
| PA0–PA7 | Port A general-purpose I/O | Configurable as digital input/output, interrupt source, or alternate function (e.g., TIM1_CH1, ADC1_IN0); supports high-sink capability (20 mA) on PA1–PA7. |
| PB0–PB7 | Port B general-purpose I/O | Includes CAN_RX (PB0), CAN_TX (PB1), LINUART_TX (PB2), LINUART_RX (PB3); supports remappable alternate functions per Section 6.2. |
| PC0–PC7 | Port C general-purpose I/O | Hosts SPI_SCK (PC1), SPI_MOSI (PC2), SPI_MISO (PC3), I2C_SCL (PC4), I2C_SDA (PC5); supports fast-mode I2C (400 kbit/s) and full-duplex SPI (10 Mbit/s). |
| PD0–PD7 | Port D general-purpose I/O | Includes USART1_TX (PD5), USART1_RX (PD6), TIM2_CH1 (PD2), TIM2_CH2 (PD3); supports synchronous USART clock output for master-slave sensor interfaces. |
| PE0–PE7 | Port E general-purpose I/O | Hosts ADC1_IN8–ADC1_IN15, TIM3_CH1–TIM3_CH3, TIM4_CH1–TIM4_CH3; enables simultaneous sampling of 8 analog channels with hardware-triggered conversion sequences. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for continuous operation at 150 °C ambient; eliminates derating calculations for under-hood ECU designs. |
| Integrated LIN 2.2-compliant UART | Hardware auto-resynchronization and master/slave mode support; reduces firmware overhead for LIN cluster node implementation. |
| Dual watchdog architecture | Independent window and standalone watchdog timers with separate clock sources; satisfies ISO 26262 ASIL-B functional safety monitoring requirements. |
| Low-power operating modes | Wait, Auto-wakeup, Halt, and Active-halt modes with configurable peripheral clock gating; achieves <1 µA standby current with RTC active. |
| Robust I/O immunity | Immune to current injection per ISO 10605; withstands >200 mA transient injection without latch-up or functional interruption. |
| SWIM single-wire debug interface | Full in-circuit debugging and programming over one pin; enables production-line flash programming without JTAG header footprint. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time fuel injection timing, spark advance calculation, and knock detection using crank/cam sensor inputs. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop combustion control algorithms with sub-microsecond timer resolution and CAN-based actuator feedback. Use Value: 24 MHz fCPU and TIM1's dead-time insertion enable precise PWM generation for coil drivers; 150 °C rating allows direct mounting near cylinder head. |
Use Scenario: Centralized control of door locks, lighting, wipers, and HVAC actuators via LIN subnetworks. IC Role / Device Role / Timing Role: LIN master node coordinating up to 16 slave nodes while managing local I/O and CAN gateway functions. Use Value: Integrated LINUART with automatic resynchronization tolerates bus voltage fluctuations in 12 V vehicle systems; 2 Kbyte EEPROM stores user preference settings across power cycles. |
| Exhaust Gas Recirculation (EGR) Valve Controller | Transmission Control Unit (TCU) Sensor Interface |
Use Scenario: Closed-loop position control of EGR valve using PWM-driven solenoid and feedback from potentiometric position sensor. IC Role / Device Role / Timing Role: Dedicated motor control MCU interfacing analog sensor, driving H-bridge gate driver, and reporting status over CAN. Use Value: 10-bit ADC with 16-channel mux and hardware trigger supports simultaneous sampling of position, temperature, and supply voltage; TIM2/TIM3 provide complementary PWM outputs with programmable dead time. |
Use Scenario: Signal conditioning and digitization of turbine speed, output shaft speed, and oil temperature sensors in automatic transmission systems. IC Role / Device Role / Timing Role: High-accuracy analog front-end MCU feeding processed data to main TCU processor via SPI or CAN. Use Value: ±2 LSB TUE ADC ensures <±0.5% speed measurement error at 8000 RPM; 6 Kbyte RAM buffers burst-mode sensor reads during gear shift transients. |
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 |
|---|---|---|---|
| STM8AF6269TCY | 32 Kbyte Flash, no CAN interface, same LQFP64 package and peripheral set otherwise. | Suitable for LIN-only or SPI/I2C sensor hubs where CAN is not required. | Select when CAN bus connectivity is unnecessary and cost-sensitive LIN gateway functionality is primary. |
| MC9S08DZ60CLC | Freescale S08 core, 60 Kbyte Flash, 4 Kbyte RAM, no integrated LIN but supports LIN via software UART; operates to 125 °C only. | Requires external LIN transceiver and additional firmware layer; limited to lower-temperature under-dash applications. | Choose only if legacy S08 toolchain compatibility is mandatory and 150 °C operation is not required. |
Compared with STM8AF6269TCY, the STM8AF6286TCY adds 32 Kbyte Flash and CAN 2.0B - critical for dual-bus ECU architectures; versus MC9S08DZ60CLC, it delivers higher temperature rating, hardware LIN, and lower system-level BOM cost through integration.
Availability
STM8AF6286TCY is available at Aetrix Electronics and suitable for engine control units, body control modules, exhaust gas recirculation controllers, and transmission sensor interfaces requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF6286TCY 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 silicon since 1987.
The STM8A product line targets cost-sensitive, high-reliability automotive applications - delivering AEC-Q100 qualified 8-bit MCUs with integrated CAN/LIN, extended temperature range, and production-proven flash memory for ECU and body electronics.
FAQ
What is the maximum operating frequency of the STM8AF6286TCY at 5.0 V?
The STM8AF6286TCY achieves a maximum CPU frequency of 24 MHz at VDD = 5.0 V, as specified in Section 10.3.1 of the datasheet. This is enabled by the high-speed internal RC oscillator (HSI) or external crystal up to 24 MHz. Frequency scaling is voltage-dependent: at 3.3 V, max fCPU drops to 16 MHz to maintain timing margin and stability.
Does the STM8AF6286TCY support hardware LIN communication without external transceivers?
No - the STM8AF6286TCY integrates a LINUART peripheral compliant with LIN 2.2 specification, but requires an external LIN transceiver (e.g., TLE7259-3GE or UJA1075) to drive the physical bus. The LINUART handles protocol framing, checksum, and auto-resynchronization; the transceiver provides level-shifting, bus protection, and slew-rate control per ISO 17987-2.
How many CAN message objects does the on-chip CAN controller support?
The STM8AF6286TCY's beCAN module supports 16 message objects in dedicated RAM, configurable as transmit or receive buffers with individual ID masking and filtering. Each object includes control/status registers, identifier, DLC, and 8-byte data field - sufficient for handling up to 16 concurrent CAN frames in automotive diagnostic and control messaging.
Is the 2 Kbyte data EEPROM truly wear-leveled and accessible during program execution?
Yes - the 2 Kbyte data EEPROM is implemented as true EEPROM (not emulated in Flash) with independent erase/write circuitry. It supports byte-wise read/write and page-wise erase (64-byte pages), with guaranteed 300 kcycle endurance and concurrent access: CPU can execute from Flash while EEPROM is being programmed or erased, with interruptible operations managed via dedicated status flags (EEPROM_CR2).
STM8AF6286TCY 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6286TCY FAQ
1.How can I place an order for STM8AF6286TCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6286TCY 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 STM8AF6286TCY reliable?
The price and inventory of STM8AF6286TCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6286TCY is usually 5 days.
3.What payment methods are accepted for STM8AF6286TCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6286TCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6286TCY?
STM8AF6286TCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6286TCY 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 STM8AF6286TCY?
For technical support, including STM8AF6286TCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6286TCY requirements.
6.How does Aetrix verify that STM8AF6286TCY is sourced from the original manufacturer or authorized distributors?
All STM8AF6286TCY 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 STM8AF6286TCY meets industry standards.
7.What is the process for return or replacement of STM8AF6286TCY?
All STM8AF6286TCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6286TCY, 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 STM8AF6286TCY part is unused and in its original packaging.
Return procedure for STM8AF6286TCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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