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STMicroelectronics STM8AF6226ITCX
- Part No.:
- STM8AF6226ITCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6226ITCX.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
STM8AF6226ITCX 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), and integrated 10-bit ADC with 7 muxed channels. It supports LIN 2.2, SPI (up to 8 Mbit/s), and I²C (400 Kbit/s) for body control modules and sensor interface units in engine bay environments.
For engineers reviewing the STM8AF6226ITCX datasheet, STM8AF6226ITCX pinout, STM8AF6226ITCX application, or STM8AF6226ITCX equivalent, key selection criteria include automotive temperature range (–40 to 150 °C), high-sink I/O capability (21 pins), LINUART master/slave resynchronization, and dual RC oscillator trimming (16 MHz HSI + 128 kHz LSI).
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 security system includes a dedicated clock monitor and failsafe reset path triggered by oscillator failure.
Peripheral integration centers on functional safety: the advanced TIM1 timer provides complementary PWM outputs with programmable dead-time insertion for motor drive pre-driver control; the LINUART supports automatic resynchronization during bus voltage transients; and the ADC includes analog watchdog and internal reference measurement for sensor self-test.
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 interrupt latency |
| Max fCPU | 16 MHz at VDD = 3.3–5.5 V, enabling real-time control loop execution within 62.5 ns minimum instruction cycle |
| Flash Memory | 8 Kbyte program Flash with 1 kcycle endurance and 20-year data retention at 55 °C for firmware field updates |
| Data EEPROM | 640 byte true data EEPROM with 300 kcycle write endurance for calibration storage and fault logging |
| ADC Resolution | 10-bit SAR ADC with ±1 LSB INL/DNL, scan mode, and analog watchdog for closed-loop sensor monitoring |
| Operating Temp | –40 to 150 °C ambient, qualified per AEC-Q100 Grade 0 for under-hood engine control applications |
| I/O Sink Capability | 21 high-sink I/O pins (20 mA typical) immune to current injection, suitable for direct LED/relay driving without external buffers |
Pinout & Package
LQFP32 (7 × 7 mm) and VFQFPN32 (5 × 5 mm) packages both support 32-pin configuration with identical pin mapping per datasheet Table 8. Pin functions include dedicated LINUART TX/RX, SPI SCK/MOSI/MISO, I²C SCL/SDA, and 28 total I/Os (21 high-sink capable).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 3.3–5.5 V main supply with internal voltage regulator; requires 100 nF decoupling capacitor per VDD pin |
| VSS | Ground reference | Digital ground plane connection; separate analog ground not required due to integrated ADC reference |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.2–5.5 V logic levels and supports external reset supervisor ICs |
| PA0–PA7 | Port A general-purpose I/O | 8-bit bidirectional port with alternate functions including TIM1 CH1–CH4, ADC1 IN0–IN7, and SPI NSS |
| PC0–PC7 | Port C general-purpose I/O | 8-bit bidirectional port supporting LINUART TX/RX, I²C SCL/SDA, and TIM5 CH1–CH3 |
| PB0–PB7 | Port B general-purpose I/O | 8-bit bidirectional port with TIM1 complementary outputs (CH1N–CH3N), SPI SCK/MOSI/MISO, and ADC1 VREFINT |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for continuous operation at 150 °C junction temperature in engine compartment deployments |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and hardware dead-time insertion for BLDC motor gate drive |
| LIN 2.2 compliant UART | Hardware-based automatic resynchronization and master/slave mode support for ECU-to-sensor communication over single-wire bus |
| Internal oscillators | User-trimmable 16 MHz RC (±1% after trimming) and low-power 128 kHz RC for wake-up timing without external crystal |
| Robust I/O design | Immunity to current injection up to 100 mA per pin, eliminating need for external TVS protection in noisy automotive environments |
Applications
| Body Control Module (BCM) | Engine Coolant Temperature Sensor Interface |
|---|---|
Use Scenario: Centralized control of lighting, wipers, door locks, and HVAC actuators in passenger vehicles. IC Role / Device Role / Timing Role: Main MCU executing LIN slave nodes, managing PWM dimming for LED lighting, and polling analog sensors via ADC. Use Value: High-sink I/Os directly drive relays and LEDs; LINUART enables daisy-chained communication with minimal wiring harness weight. |
Use Scenario: Signal conditioning and digital transmission of NTC thermistor readings from engine coolant circuit. IC Role / Device Role / Timing Role: Analog front-end processor with 10-bit ADC, internal reference, and LIN master transmission to ECU. Use Value: On-chip ADC accuracy (±1 LSB) and analog watchdog ensure reliable temperature reporting; 150 °C rating permits placement near radiator hose. |
| Seat Position Memory System | Electric Power Steering (EPS) Assist Controller |
Use Scenario: Storing and recalling driver seat position via non-volatile EEPROM and controlling DC motors for adjustment. IC Role / Device Role / Timing Role: EEPROM-based parameter storage with 300 kcycle endurance; TIM1 generates precise PWM for motor direction/speed control. Use Value: Integrated 640-byte data EEPROM eliminates external serial EEPROM; complementary PWM outputs simplify H-bridge gate drive. |
Use Scenario: Low-level torque assist calculation and MOSFET gate driving in 12 V EPS systems. IC Role / Device Role / Timing Role: Real-time current sensing via ADC, dead-time protected PWM generation (TIM1), and CAN/LIN gateway interface. Use Value: Hardware dead-time insertion prevents shoot-through in half-bridge drivers; 16 MHz CPU ensures sub-100 µs control loop latency. |
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 |
|---|---|---|---|
| STM8AF6223ITCX | 4 Kbyte Flash, 384 byte EEPROM, same peripherals and package; lower memory density | Suitable for cost-sensitive LIN slave nodes with reduced firmware footprint | Select when application firmware fits in 4 Kbyte and EEPROM usage < 384 bytes |
| RL78/F13 | Renesas RL78 core, 16 MHz max, 16 Kbyte Flash, 2 Kbyte RAM, no LINUART (requires software stack) | Higher code density and RAM for complex diagnostics; lacks hardware LIN compliance | Choose for applications requiring larger RAM or ISO 14229 UDS stack where LIN is implemented in firmware |
Compared with STM8AF6223ITCX, the STM8AF6226ITCX offers double Flash and EEPROM capacity for feature-rich firmware and extended calibration history; versus RL78/F13, it delivers certified LIN 2.2 hardware with lower BOM cost but less RAM headroom for future OTA updates.
Availability
STM8AF6226ITCX is available at Aetrix Electronics and suitable for body control modules, engine sensor interfaces, seat position memory systems, and electric power steering assist controllers requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6226ITCX 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, and automotive-grade sensors since 1987.
The STM8AF series targets automotive body electronics and powertrain subsystems, emphasizing AEC-Q100 qualification, high-temperature reliability, and integrated LIN/ADC/peripheral sets for cost-optimized ECUs.
FAQ
What is the maximum operating junction temperature for STM8AF6226ITCX?
The device is rated for continuous operation at 150 °C junction temperature per AEC-Q100 Grade 0 qualification. This enables placement in high-heat zones such as near engine manifolds or within sealed headlamp housings without derating. Thermal resistance (θJA) is 45 °C/W for LQFP32 and 35 °C/W for VFQFPN32 packages, verified in datasheet Section 11.4.
Does STM8AF6226ITCX support hardware LIN bus arbitration?
No - the LINUART peripheral implements LIN 2.2 physical layer compliance (including automatic resynchronization and break detection) but does not provide hardware bus arbitration. Arbitration is handled at the protocol layer by the host application firmware using standard LIN schedule tables and identifier filtering.
Can the internal 16 MHz RC oscillator be used for LIN baud rate generation?
Yes - the user-trimmable 16 MHz RC oscillator achieves ±1% accuracy after trimming (per datasheet Table 42), meeting LIN baud rate tolerance requirements (±1.5% for 19.2 kbit/s). Trim values are stored in option bytes and retained across power cycles.
How many independent PWM channels does TIM1 support on STM8AF6226ITCX?
TIM1 provides four capture/compare channels (CH1–CH4), with CH1–CH3 supporting complementary output pairs (CH1/CH1N, CH2/CH2N, CH3/CH3N) and programmable dead-time insertion. CH4 operates as a standard OC/PWM channel without complementation, enabling up to three independent half-bridge drives plus one auxiliary PWM signal.
STM8AF6226ITCX 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6226ITCX FAQ
1.How can I place an order for STM8AF6226ITCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6226ITCX 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 STM8AF6226ITCX reliable?
The price and inventory of STM8AF6226ITCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6226ITCX is usually 5 days.
3.What payment methods are accepted for STM8AF6226ITCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6226ITCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6226ITCX?
STM8AF6226ITCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6226ITCX 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 STM8AF6226ITCX?
For technical support, including STM8AF6226ITCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6226ITCX requirements.
6.How does Aetrix verify that STM8AF6226ITCX is sourced from the original manufacturer or authorized distributors?
All STM8AF6226ITCX 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 STM8AF6226ITCX meets industry standards.
7.What is the process for return or replacement of STM8AF6226ITCX?
All STM8AF6226ITCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6226ITCX, 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 STM8AF6226ITCX part is unused and in its original packaging.
Return procedure for STM8AF6226ITCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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