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STMicroelectronics STM8AF6226TCY
- Part No.:
- STM8AF6226TCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6226TCY.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,081
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Product details
Overview
STM8AF6226TCY from STMicroelectronics is an AEC-Q100 qualified automotive-grade 8-bit MCU 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, 10-bit ADC with 7 muxed channels, LIN 2.2-compliant UART, SPI up to 8 Mbit/s, and I²C up to 400 Kbit/s - deployed in engine control modules and body electronics requiring extended temperature operation up to 150 °C.
For engineers reviewing the STM8AF6226TCY datasheet, STM8AF6226TCY pinout, STM8AF6226TCY application, or STM8AF6226TCY equivalent, this page delivers verified technical context, package-specific pin roles, automotive-grade timing and power specifications, and validated alternative options for functional migration in safety-critical embedded systems.
Technical Context
The STM8AF6226TCY implements a Harvard-architecture STM8A core with 3-stage pipeline and extended instruction set, supporting nested interrupts across 32 vectors with up to 28 external interrupt sources on 7 vectors. Its clock system integrates user-trimmable 16 MHz RC and low-power 128 kHz RC oscillators plus crystal/resonator support with clock security monitoring.
Peripheral integration includes an advanced 16-bit TIM1 timer with dead-time insertion and complementary outputs, two 16-bit general-purpose timers (TIM5, TIM2), an 8-bit basic timer (TIM6), auto-wakeup timer, window and independent watchdogs, and LINUART with automatic resynchronization - all operating under 3–5.5 V supply across −40 to +150 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time execution and efficient code density for resource-constrained automotive nodes. |
| Max CPU Frequency | 16 MHz at 5 V; supports high-speed control loops in motor drivers and sensor fusion without external PLL. |
| Flash Memory | 8 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; meets long-life requirements for automotive ECUs with infrequent firmware updates. |
| Data EEPROM | 640 byte true data EEPROM rated for 300 kwrite cycles; provides robust nonvolatile storage for calibration data and fault logs without external serial EEPROM. |
| ADC Resolution | 10-bit SAR ADC with ±1 LSB INL/DNL, 7 muxed input channels + 1 internal reference channel; enables precise analog sensing of throttle position, coolant temperature, and battery voltage. |
| LIN Interface | LIN 2.2-compliant UART with master/slave modes and automatic resynchronization; eliminates need for external LIN transceiver in simple sub-node applications. |
| Operating Temperature | −40 to +150 °C ambient; certified for under-hood deployment in engine management, transmission control, and HVAC actuators. |
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 housings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3–5.5 V supply rail; requires local 100 nF ceramic decoupling per VDD pin for EMC compliance in noisy automotive environments. |
| VSS | Ground reference | Dedicated digital ground return; must be connected to low-impedance chassis ground plane to minimize noise coupling into ADC and LIN circuits. |
| 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 for fail-safe startup sequencing. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with high sink capability (up to 20 mA per pin); supports alternate functions including TIM1/2 channels, ADC inputs, and SPI/I²C signals. |
| PB0–PB7 | General-purpose I/O port B | 8-bit bidirectional port with 21 high-sink outputs across full package; configurable as LINUART TX/RX, SPI SCK/MOSI/MISO, or I²C SCL/SDA. |
| PC0–PC7 | General-purpose I/O port C | 8-bit port supporting TIM1 complementary outputs, ADC trigger inputs, and wake-up event detection; includes dedicated beeper output function. |
| PD0–PD7 | General-purpose I/O port D | 8-bit port with remappable alternate functions; used for TIM5, ADC scan control, and additional LIN or SPI interfaces in multi-node configurations. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for operation from −40 to +150 °C ambient with full electrical characterization - required for engine control, transmission, and brake system MCUs. |
| Integrated LIN 2.2 UART | Eliminates external LIN transceiver in cost-sensitive nodes; supports automatic baud rate resynchronization to tolerate oscillator drift in slave devices. |
| True data EEPROM | 640 bytes with guaranteed 300 kcycle endurance and 20-year data retention at 55 °C - enables field-updatable calibration without external memory. |
| Advanced TIM1 timer | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - suitable for 3-phase motor gate drive control. |
| Low-power modes | Wait, auto-wakeup, and Halt modes with user-definable clock gating; achieves <1.5 µA active halt current at 3.3 V for battery-powered telematics modules. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and oxygen sensor feedback in gasoline direct injection systems. IC Role / Device Role / Timing Role: Primary controller executing closed-loop fuel injection and spark timing algorithms with sub-microsecond interrupt latency. Use Value: 16 MHz deterministic execution and 10-bit ADC with analog watchdog ensure accurate air-fuel ratio control under transient load conditions. |
Use Scenario: Centralized management of door locks, interior lighting, window lifters, and mirror adjustment in premium vehicle platforms. IC Role / Device Role / Timing Role: LIN master coordinating communication with distributed slave nodes (e.g., seat controllers, mirror modules) over single-wire bus. Use Value: Integrated LIN 2.2 UART with automatic resync maintains reliable communication despite voltage fluctuations and EMI in cabin wiring harnesses. |
| Transmission Control Module (TCM) | Heating/Ventilation/Air Conditioning (HVAC) |
Use Scenario: Gear selection logic, solenoid driver control, and torque converter clutch management in 6-speed automatic transmissions. IC Role / Device Role / Timing Role: High-reliability timing source for PWM-driven solenoid valves using TIM1's complementary outputs with dead-time protection. Use Value: 150 °C-rated LQFP32 package and robust I/O design withstand under-dash thermal cycling while maintaining signal integrity on high-current drivers. |
Use Scenario: Blower motor speed regulation, blend door actuation, and cabin temperature feedback processing in climate control systems. IC Role / Device Role / Timing Role: Sensor hub aggregating NTC thermistor readings, Hall-effect fan RPM signals, and potentiometer inputs via ADC and GPIO. Use Value: 640-byte data EEPROM stores user preference profiles and seasonal calibration offsets without requiring external nonvolatile memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF6223TCY | 4 Kbyte Flash, same peripherals and package; lacks TIM1 advanced control timer and one CAPCOM channel. | Suitable for simpler BCM or HVAC nodes without 3-phase motor control or complex PWM generation. | Select when cost sensitivity outweighs need for advanced timer features and higher Flash capacity. |
| RL78/F13-BS | Renesas RL78 core, 16 MHz max, 16 Kbyte Flash, 1.25 Kbyte RAM, LIN support, but no integrated data EEPROM. | Requires external EEPROM for calibration storage; broader peripheral set but higher BOM count in legacy replacement designs. | Choose for new designs needing larger memory headroom and toolchain continuity within Renesas ecosystem. |
Compared with STM8AF6223TCY, the STM8AF6226TCY adds 4 Kbyte Flash and TIM1 advanced timer - critical for engine/transmission control. Versus RL78/F13-BS, it offers integrated EEPROM and lower system-level component count, though with smaller RAM and less flexible interrupt vectoring.
Availability
STM8AF6226TCY is available at Aetrix Electronics and suitable for engine control units, body control modules, and HVAC systems requiring stable component supply across extended automotive lifecycles and high-temperature operating environments.
Supply support for STM8AF6226TCY 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 analog products.
The STM8AF series targets automotive body, chassis, and powertrain applications with AEC-Q100 qualification, extended temperature range, and integrated LIN/ADC/timer subsystems to reduce system complexity and bill-of-materials cost.
FAQ
What is the maximum operating junction temperature for STM8AF6226TCY?
The device is qualified for operation up to +150 °C ambient temperature, with a maximum junction temperature of +165 °C under specified thermal conditions. This rating is validated per AEC-Q100 Grade 0 test requirements and confirmed in Section 10.3 of the DS9884 datasheet, enabling use in under-hood locations near engines and exhaust manifolds.
Does STM8AF6226TCY support in-circuit debugging via SWIM interface?
Yes, the STM8AF6226TCY includes a Single Wire Interface Module (SWIM) compliant with ST's standard debug protocol. It supports full read/write access to memory and registers, breakpoint setting, and real-time variable monitoring using ST-LINK/V2 or compatible debug probes - documented in Section 4.2 of DS9884.
Can the internal 16 MHz RC oscillator be calibrated for improved accuracy?
Yes, the internal high-speed RC oscillator (HSI) is user-trimmable via the CLK_HSITRIMR register, allowing fine-tuning in steps of ±0.5% across a ±8% total range. Calibration is performed during production and can be adjusted in-field using factory-provided trim values or custom routines - detailed in Section 4.5.1 of the datasheet.
Is there hardware support for LIN bus wakeup from low-power mode?
Yes, the LINUART peripheral supports automatic wakeup from Wait and Halt modes upon valid LIN header detection on the RX line. This feature is enabled via the LINCR1 register's WUIE bit and requires no CPU intervention - enabling ultra-low-power sleep states while maintaining bus responsiveness, as specified in Section 4.14.1.
STM8AF6226TCY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- 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:
STM8AF6226TCY FAQ
1.How can I place an order for STM8AF6226TCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6226TCY 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 STM8AF6226TCY reliable?
The price and inventory of STM8AF6226TCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6226TCY is usually 5 days.
3.What payment methods are accepted for STM8AF6226TCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6226TCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6226TCY?
STM8AF6226TCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6226TCY 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 STM8AF6226TCY?
For technical support, including STM8AF6226TCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6226TCY requirements.
6.How does Aetrix verify that STM8AF6226TCY is sourced from the original manufacturer or authorized distributors?
All STM8AF6226TCY 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 STM8AF6226TCY meets industry standards.
7.What is the process for return or replacement of STM8AF6226TCY?
All STM8AF6226TCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6226TCY, 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 STM8AF6226TCY part is unused and in its original packaging.
Return procedure for STM8AF6226TCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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