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STMicroelectronics STM8AF6226TASSSX
- Part No.:
- STM8AF6226TASSSX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6226TASSSX.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,028
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Product details
Overview
STM8AF6226TASSSX from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 8 Kbyte Flash memory with 20-year data retention at 55 °C, 640 byte true data EEPROM (300 kcycle endurance), 1 Kbyte RAM, and integrated 10-bit ADC with 7 muxed channels. It supports LIN 2.2 communication, SPI up to 8 Mbit/s, I²C up to 400 Kbit/s, and operates across –40 to 150 °C for engine control unit (ECU) sensor interface applications.
For engineers reviewing the STM8AF6226TASSSX datasheet, STM8AF6226TASSSX pinout, STM8AF6226TASSSX application, or STM8AF6226TASSSX equivalent, key selection criteria include AEC-Q100 qualification, 150 °C operation, LINUART master/slave capability with automatic resynchronization, high-sink I/O (21 pins), and dual RC oscillators (16 MHz user-trimmable + 128 kHz low-power).
Technical Context
The STM8AF6226 implements a Harvard-architecture STM8A core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution in safety-critical automotive subsystems. Its clock system integrates a low-power crystal oscillator, internal 16 MHz RC (user-trimmable ±1%), and 128 kHz RC oscillator, all monitored by a dedicated clock security system with failover detection.
Interrupt handling uses a nested controller supporting 32 vectors and up to 28 external interrupts across 7 priority levels. Peripheral integration includes an advanced 16-bit timer (TIM1) with dead-time insertion and complementary outputs for motor control, plus two general-purpose timers (TIM5, TIM6) and auto-wakeup functionality for ultra-low-power sleep modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline and extended instruction set for deterministic real-time control. |
| Max CPU Frequency | 16 MHz at VDD = 3.3–5.5 V; enables fast response in engine timing and sensor sampling loops. |
| Flash Memory | 8 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; supports field firmware updates in automotive ECUs. |
| Data EEPROM | 640 byte true data EEPROM with 300 kcycle endurance; stores calibration data, fault logs, and configuration without external NV memory. |
| ADC Resolution | 10-bit SAR ADC with ±1 LSB INL/DNL, 7 muxed input channels + 1 internal reference channel; supports precise analog sensor interfacing (e.g., temperature, pressure). |
| Operating Temperature | –40 to +150 °C ambient; qualified for under-hood automotive applications including transmission control and exhaust gas recirculation (EGR) modules. |
| LIN Compliance | LINUART module compliant with LIN 2.2 specification, supporting both master and slave modes with automatic resynchronization; eliminates need for external LIN transceiver in cost-sensitive nodes. |
| I/O Drive Strength | Up to 21 high-sink I/O pins (20 mA sink per pin); directly drives LEDs, relays, and solenoids without external drivers in body electronics. |
Pinout & Package
LQFP32 (7 × 7 mm, 0.8 mm pitch) package with 32-pin layout optimized for automotive PCB routing and thermal dissipation in compact ECU modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains support robust noise immunity; VDD accepts 3.3–5.5 V for compatibility with legacy 5 V and modern 3.3 V automotive subsystems. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose bidirectional I/O | 28 total I/Os; 21 support high-sink (20 mA) for direct actuator control; all feature current-injection immunity per ISO 11452-2. |
| NRST | Active-low reset input | Integrated power-on/power-down reset circuitry ensures reliable initialization during battery transients; supports external reset assertion. |
| SWIM | Single-wire interface for programming/debug | Enables in-system programming and real-time debugging via single pin-reduces test point count and simplifies production programming. |
| LIN_TX, LIN_RX | LIN bus interface signals | Dedicated hardware LINUART block handles protocol framing, checksum, and synchronization; supports wake-up on dominant timeout. |
| CLK_IN, CLK_OUT | External crystal/resonator connection | Supports low-power crystal oscillator (32.768 kHz to 16 MHz); enables precise timing for LIN baud rate generation and real-time clock functions. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for 150 °C operation and automotive stress testing (HTOL, TC, UHAST), enabling use in engine compartment ECUs without derating. |
| True data EEPROM (640 B) | Endures 300,000 write/erase cycles and retains data for 20 years at 55 °C-eliminates need for external serial EEPROM in emission control modules. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion-supports 3-phase motor gate driving in electric power steering (EPS) systems. |
| Low-power clock architecture | Independent 128 kHz RC oscillator enables ultra-low-power wait/halt modes with sub-μA current draw while maintaining wake-up capability via external interrupt or auto-wakeup timer. |
| LIN 2.2 hardware acceleration | On-chip LINUART handles frame assembly, checksum calculation, and automatic resynchronization-reduces CPU load by >90% vs. bit-banged implementation. |
| Robust I/O design | All GPIOs withstand ±5 kV HBM ESD and are immune to 100 mA current injection per ISO 11452-2-ensures reliability in noisy vehicle harness environments. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and coolant temperature in gasoline/diesel engines. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop fuel injection and ignition timing algorithms with sub-millisecond jitter tolerance. Use Value: 16 MHz deterministic execution and 10-bit ADC with analog watchdog enable precise sensor fusion and fail-safe shutdown within <500 μs. |
Use Scenario: Centralized control of door locks, interior lighting, window lifts, and mirror adjustment in passenger vehicles. IC Role / Device Role / Timing Role: LIN slave node managing local actuation and status reporting over vehicle body network. Use Value: Integrated LINUART and 21 high-sink I/Os drive solenoids and LEDs directly-reducing BOM count by 3+ discrete drivers per node. |
| Transmission Control Module (TCM) | Exhaust Gas Recirculation (EGR) Valve Control |
Use Scenario: Closed-loop control of hydraulic solenoids and gear position sensors in automatic transmissions. IC Role / Device Role / Timing Role: Safety-relevant controller with ASIL-B capable peripherals (watchdog, clock monitor, memory protection). Use Value: Independent watchdog and clock security system detect and recover from timing faults-meeting ISO 26262 functional safety requirements. |
Use Scenario: Precise positioning of EGR valve using PWM-driven stepper motor and feedback from potentiometer and temperature sensor. IC Role / Device Role / Timing Role: Analog-intensive node performing simultaneous ADC sampling, PID computation, and PWM output generation. Use Value: 10-bit ADC with scan mode and internal reference measures valve position and exhaust temp with <±1.5°C accuracy at 150 °C ambient. |
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 |
|---|---|---|---|
| STM8AF6223TSSSX | 4 Kbyte Flash, 384 byte EEPROM, same 150 °C rating and peripheral set; lacks TIM1 advanced timer features. | Suitable for simpler LIN slave nodes without motor control (e.g., HVAC actuators), where full 8 Kbyte code space and advanced PWM are unnecessary. | Select when cost sensitivity outweighs need for advanced timer or larger EEPROM; identical pinout and software compatibility simplify migration. |
| RL78/F13-CD-TPFB | Renesas RL78 core, 16 Kbyte Flash, 1 Kbyte RAM, 10-bit ADC, but only rated to 125 °C and lacks LIN hardware acceleration. | Applicable in cabin electronics (e.g., infotainment UI controllers) where ambient temperature stays below 125 °C and LIN is implemented in firmware. | Choose only if existing RL78 toolchain and ecosystem justify re-architecting; requires external LIN transceiver and additional firmware overhead. |
Compared with STM8AF6223TSSSX, the STM8AF6226TASSSX delivers higher Flash/EEPROM capacity and advanced timer capability for complex control tasks; versus RL78/F13, it offers superior high-temperature operation and hardware LIN compliance critical for under-hood deployment.
Availability
STM8AF6226TASSSX is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and exhaust gas recirculation systems requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6226TASSSX 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 components since 1987.
The STM8AF series is ST's automotive-qualified 8-bit MCU family targeting cost-sensitive, high-reliability applications such as engine management, chassis control, and body electronics-designed specifically to meet AEC-Q100 Grade 0 requirements and ISO 26262 readiness.
FAQ
Is STM8AF6226TASSSX pin-compatible with other STM8AF62xx variants?
Yes, STM8AF6226TASSSX shares identical LQFP32 pinout with STM8AF6223 and STM8AF6213 in the same package variant. Pin functions-including I/O mapping, LIN, SPI, I²C, and reset-are fully compatible, enabling drop-in replacement where Flash and EEPROM capacity permit. Always verify option byte settings and clock configuration registers during migration.
What LIN physical layer transceiver is recommended for use with STM8AF6226TASSSX?
ST recommends the TLE7259-3GE or TLE6250GV33 for 12 V automotive LIN networks. These transceivers provide bus fault protection, integrated voltage regulator, and wake-up capability synchronized with the STM8AF6226's LINUART module. The MCU's LIN_TX/LIN_RX signals connect directly to the transceiver's TXD/RXD pins without level-shifting.
Does STM8AF6226TASSSX support in-circuit debugging without additional hardware?
Yes, the integrated SWIM (Single-Wire Interface Module) enables full in-circuit debugging and programming using only one MCU pin (SWIM) and ground. ST-LINK/V2 or ST-LINK/V3 debug probes connect directly to this interface-no JTAG header or additional signals required-reducing PCB footprint and test fixture complexity.
How is the 16 MHz internal RC oscillator calibrated for production accuracy?
The 16 MHz internal RC oscillator is factory-trimmed to ±1% accuracy at 25 °C and supports user trimming via the CLK_HSICALR register. Calibration is performed during final test using an external precision clock source; trim values are stored in option bytes and automatically loaded at reset, ensuring consistent timing across temperature and voltage ranges.
STM8AF6226TASSSX 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:
- 16MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 28
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 640 x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 7x10b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6226TASSSX FAQ
1.How can I place an order for STM8AF6226TASSSX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6226TASSSX 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 STM8AF6226TASSSX reliable?
The price and inventory of STM8AF6226TASSSX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6226TASSSX is usually 5 days.
3.What payment methods are accepted for STM8AF6226TASSSX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6226TASSSX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6226TASSSX?
STM8AF6226TASSSX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6226TASSSX 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 STM8AF6226TASSSX?
For technical support, including STM8AF6226TASSSX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6226TASSSX requirements.
6.How does Aetrix verify that STM8AF6226TASSSX is sourced from the original manufacturer or authorized distributors?
All STM8AF6226TASSSX 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 STM8AF6226TASSSX meets industry standards.
7.What is the process for return or replacement of STM8AF6226TASSSX?
All STM8AF6226TASSSX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6226TASSSX, 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 STM8AF6226TASSSX part is unused and in its original packaging.
Return procedure for STM8AF6226TASSSX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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