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STMicroelectronics STM8AF6266TAY
- Part No.:
- STM8AF6266TAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6266TAY.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,501
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Product details
Overview
STM8AF6266TAY from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 32 Kbyte Flash program memory, 1 Kbyte true data EEPROM, and integrated 10-bit ADC with up to 10 channels. It supports LIN 2.2, SPI (up to 8 Mbit/s), and I²C (up to 400 Kbit/s), and operates across -40 °C to 150 °C for engine control unit (ECU) and body electronics applications.
For engineers reviewing the STM8AF6266TAY datasheet, STM8AF6266TAY pinout, STM8AF6266TAY application, or STM8AF6266TAY equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade operating parameters, and real-world use cases in high-temperature vehicle subsystems.
Technical Context
The STM8AF6266TAY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, delivering 10 MIPS at 16 MHz. Its clock system includes trimmable 16 MHz HSI and 128 kHz LSI oscillators, plus external crystal support and clock security monitoring.
It integrates an advanced control timer with 4 CAPCOM channels, dead-time insertion, and 3 complementary outputs for motor drive timing; two general-purpose 16-bit PWM timers; and a 10-bit ADC with 2 LSB TUE accuracy, scan mode, and analog watchdog - all qualified for automotive operation up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time response in safety-critical automotive firmware. |
| Max fCPU | 16 MHz at VDD = 3.3–5.5 V; supports time-critical LIN frame generation and PWM modulation without jitter. |
| Flash Memory | 32 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; suitable for field-updatable ECU firmware. |
| Data EEPROM | 1 Kbyte true data EEPROM with 300 kcycle endurance; stores calibration data, odometer values, and fault logs non-volatilely. |
| ADC Resolution & Accuracy | 10-bit ADC with 2 LSB total unadjusted error (TUE); meets precision requirements for sensor signal acquisition in throttle position or coolant temperature sensing. |
| Operating Temperature | -40 °C to +150 °C ambient; certified for under-hood deployment in engine management and transmission control modules. |
| LIN Compliance | LIN 2.2 compliant UART with automatic resynchronization; enables robust communication with sensors and actuators in distributed automotive networks. |
Pinout & Package
STM8AF6266TAY is packaged in VFQFPN32 (5 × 5 mm, 0.5 mm pitch), a thermally enhanced, space-constrained automotive package with exposed thermal pad for improved heat dissipation in high-temperature environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3.3–5.5 V supply rail; decoupled via external 100 nF capacitor per VDD pin to suppress switching noise in noisy automotive environments. |
| VSS | Ground reference | Digital ground return path; separate VSS pins minimize ground bounce during high-speed I/O transitions. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external RC network for power-on reset timing compliance per ISO 16750-2. |
| PA0–PA7 | General-purpose I/O port A | Up to 8 configurable pins with HS capability; support alternate functions including TIM1/2 channels, ADC inputs, and LINUART TX/RX. |
| PB0–PB7 | General-purpose I/O port B | Includes SWIM debug interface (PB4/PB5), I²C SCL/SDA (PB6/PB7), and additional ADC channels; supports current-injection immunity per AEC-Q100. |
| PC0–PC7 | General-purpose I/O port C | Supports SPI MOSI/MISO/SCK (PC4–PC6), TIM3 channels, and high-sink capability (up to 20 mA per pin) for direct LED or solenoid drive. |
| PD0–PD7 | General-purpose I/O port D | Includes LINUART RX/TX (PD0/PD1), TIM4 channels, and wake-up interrupt capability; configured for low-power entry via external event detection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for continuous operation at 150 °C ambient; eliminates derating concerns in engine bay placements. |
| Single-wire interface module (SWIM) | On-chip debug interface using only PB4/PB5; enables in-system programming and real-time trace without dedicated JTAG pins. |
| Advanced control timer (TIM1) | 16-bit timer with 3 complementary outputs and programmable dead-time; supports 3-phase motor commutation without external gate drivers. |
| Low-power modes with clock gating | Wait, auto-wakeup, and Halt modes with user-selectable peripheral clock disable; reduces active current to <1.5 µA in Halt with RTC running. |
| Analog watchdog & scan mode | Hardware-monitored ADC thresholds with interrupt on violation; enables autonomous battery voltage or sensor fault detection without CPU intervention. |
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 powertrains. IC Role / Device Role / Timing Role: Central controller executing fuel injection timing, spark advance, and OBD-II diagnostics with sub-millisecond latency. Use Value: 150 °C rating and LIN 2.2 support enable direct integration near engine block; 32 Kbyte Flash accommodates dual-bank firmware for safe OTA updates. |
Use Scenario: Managing door locks, window lifters, interior lighting, and HVAC fan speed in passenger compartments. IC Role / Device Role / Timing Role: Local node processor handling LIN slave communication, PWM dimming, and GPIO-based switch debouncing. Use Value: Integrated 10-bit ADC reads potentiometer feedback for smooth fan control; 1 Kbyte EEPROM retains user preferences across ignition cycles. |
| Transmission Control Module (TCM) | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Closed-loop control of solenoid valves and pressure sensors in automatic gearbox hydraulic systems. IC Role / Device Role / Timing Role: High-reliability actuator driver coordinating PWM valve timing, CAN/LIN gateway, and fault-safe shutdown logic. Use Value: Advanced control timer provides synchronized 3-channel PWM with dead-time insertion to prevent shoot-through in H-bridge drivers. |
Use Scenario: Signal conditioning and digital conversion of torque and steering angle sensor outputs before CAN transmission. IC Role / Device Role / Timing Role: Analog front-end processor performing ADC oversampling, filtering, and LIN master polling of Hall-effect sensors. Use Value: 2 LSB TUE ADC accuracy ensures <±0.5° angular measurement error; robust I/O design withstands ESD events per ISO 10605. |
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 |
|---|---|---|---|
| STM8AF6246TAY | 16 Kbyte Flash, 0.5 Kbyte EEPROM, same core/peripherals but reduced memory; VFQFPN32 package identical. | Suitable for cost-sensitive BCMs with smaller firmware footprints and fewer calibration parameters. | Select when memory headroom is not required and BOM cost reduction is prioritized over future firmware scalability. |
| RL78/F13-GB | Renesas RL78 core, 32 Kbyte Flash, 4 Kbyte RAM, LIN support, but no integrated EEPROM; operates to 125 °C only. | Requires external EEPROM for persistent storage; limited to under-dash applications due to lower max temperature. | Choose only if existing RL78 toolchain and ecosystem alignment outweigh the need for 150 °C operation and embedded EEPROM. |
Compared with STM8AF6266TAY, STM8AF6246TAY offers identical automotive qualification and package but less memory for simpler nodes, while RL78/F13-GB trades EEPROM integration and 150 °C rating for Renesas-specific development advantages in non-under-hood roles.
Availability
STM8AF6266TAY is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control systems requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF6266TAY 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-effective, high-reliability 8-bit control in harsh environments - specifically engineered for under-hood and chassis applications where AEC-Q100 Grade 0 and 150 °C operation are mandatory.
FAQ
What is the maximum junction temperature specification for STM8AF6266TAY?
The STM8AF6266TAY is rated for operation up to 150 °C ambient temperature, with a maximum junction temperature of 175 °C under specified thermal conditions (θJA = 40 °C/W, PD ≤ 500 mW). This is validated per AEC-Q100 Grade 0 test requirements and confirmed in Section 11.4 of the official datasheet.
Does STM8AF6266TAY support in-circuit debugging without dedicated JTAG pins?
Yes - it uses the Single-Wire Interface Module (SWIM) accessible via PB4 (SWIM) and PB5 (RST), enabling full in-system programming, breakpoint setting, and register inspection using ST-LINK/V2 or compatible debuggers. No external JTAG header is required.
Can the integrated 10-bit ADC operate reliably with VDDA = 3.3 V?
Yes - the ADC maintains 2 LSB total unadjusted error (TUE) and 2 LSB integral nonlinearity (INL) at VDDA = 3.3 V, as verified in Table 41 of the datasheet. It supports single-ended and differential input modes with hardware-accelerated scan sequencing.
Is the VFQFPN32 package of STM8AF6266TAY lead-free and RoHS-compliant?
Yes - the STM8AF6266TAY VFQFPN32 package is fully RoHS-compliant and lead-free, meeting EU Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements. Full compliance documentation is available in ST's official product change notices.
STM8AF6266TAY 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:
- 16MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 7x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6266TAY FAQ
1.How can I place an order for STM8AF6266TAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6266TAY 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 STM8AF6266TAY reliable?
The price and inventory of STM8AF6266TAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6266TAY is usually 5 days.
3.What payment methods are accepted for STM8AF6266TAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6266TAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6266TAY?
STM8AF6266TAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6266TAY 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 STM8AF6266TAY?
For technical support, including STM8AF6266TAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6266TAY requirements.
6.How does Aetrix verify that STM8AF6266TAY is sourced from the original manufacturer or authorized distributors?
All STM8AF6266TAY 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 STM8AF6266TAY meets industry standards.
7.What is the process for return or replacement of STM8AF6266TAY?
All STM8AF6266TAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6266TAY, 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 STM8AF6266TAY part is unused and in its original packaging.
Return procedure for STM8AF6266TAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8AF6266TAY Tags
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