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STMicroelectronics STM8AF6268TDX
- Part No.:
- STM8AF6268TDX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AF6268TDX.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,929
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Product details
Overview
STM8AF6268TDX 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, 2 Kbyte RAM, 10-bit ADC with up to 10 channels, LINUART, SPI, I²C, and advanced timers-including a 16-bit advanced control timer with dead-time insertion-targeted for engine control units and body electronics in 150 °C environments.
For engineers reviewing the STM8AF6268TDX datasheet, STM8AF6268TDX pinout, STM8AF6268TDX application, or STM8AF6268TDX equivalent, this part supports LIN 2.2 master/slave operation, high-temperature operation up to 150 °C, robust I/O immunity against current injection, and SWIM-based single-wire debug-critical for automotive ECU validation and production programming.
Technical Context
The STM8AF6268TDX implements a Harvard-architecture STM8A CPU with 3-stage pipeline, delivering 10 MIPS at 16 MHz (1.6 cycles/instruction average). Its clock system integrates user-trimmable 16 MHz HSI and 128 kHz LSI RC oscillators, plus external crystal support and clock security monitoring.
Interrupt handling uses a nested controller with 32 vectors and up to 34 external interrupts across 5 vectors. Memory subsystem includes Flash with 20-year data retention at 55 °C after 1 kcycle and EEPROM rated for 300 kwrite cycles-both protected by read-out and write-protection mechanisms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time execution in safety-critical automotive functions. |
| Max fCPU | 16 MHz; delivers 10 MIPS at full speed-sufficient for LIN protocol timing, PWM generation, and sensor sampling in ECUs. |
| Flash Memory | 32 Kbyte; supports firmware updates and bootloader storage with 20-year data retention at 55 °C after 1,000 erase/write cycles. |
| Data EEPROM | 1 Kbyte true EEPROM; provides nonvolatile parameter storage (e.g., calibration values) with 300,000 endurance cycles. |
| ADC Resolution | 10-bit with ±2 LSB total unadjusted error; ensures accurate analog sensing of throttle position, temperature, and battery voltage. |
| Operating Temp | −40 °C to +150 °C; certified for under-hood automotive applications including engine management and transmission control. |
| LIN Compliance | LIN 2.2 compliant UART with automatic resynchronization; enables robust communication with sensors and actuators in distributed vehicle networks. |
Pinout & Package
STM8AF6268TDX is housed in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32 pins, optimized for compact automotive PCB layouts and thermal performance in high-temperature environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | 3.0–5.5 V main supply rail; decoupled via external VCAP capacitor for stable core operation during transients. |
| VSS | Ground reference | Dedicated digital ground plane connection; separate from analog ground to minimize noise coupling into ADC. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external watchdog or power-monitor reset assertion. |
| SWIM | Single-wire interface module | Debug and programming interface using one bidirectional pin-enables in-system programming without dedicated JTAG pins. |
| PA0–PA7 | Programmable GPIO / alternate function | Up to 8 pins configurable as LINUART TX/RX, SPI SCK/MOSI/MISO, or ADC inputs-supports flexible peripheral mapping. |
| PB0–PB7 | Programmable GPIO / alternate function | Includes TIM1/2/3/4 channels, I²C SCL/SDA, and high-sink capability (20 mA) for direct LED or relay driver interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation-meets automotive engine compartment reliability requirements. |
| Advanced control timer (TIM1) | 16-bit with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time-enables precise 3-phase motor control. |
| Low-power modes | Wait, auto-wakeup, and Halt modes with user-definable clock gating-reduces current consumption to <1 μA in Halt mode. |
| Analog watchdog | Configurable threshold monitoring on ADC channels-triggers interrupt on out-of-range sensor readings without CPU polling. |
| I/O current injection immunity | Robust design withstands >50 mA injected current per pin-ensures functional safety in noisy automotive 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 interrupt latency. Use Value: 16 MHz deterministic execution and LIN 2.2 support enable synchronized actuator control and diagnostic reporting over vehicle network. |
Use Scenario: Centralized management of door locks, window lifts, lighting, and HVAC in passenger compartments. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slave nodes (e.g., mirror controls, seat modules) and local analog/digital sensors. Use Value: Integrated 10-bit ADC and high-sink I/O eliminate external signal conditioning, reducing BOM count and board space. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
Use Scenario: Gear selection logic, solenoid valve timing, and torque converter clutch control in automatic transmissions. IC Role / Device Role / Timing Role: Safety-relevant controller managing PWM-driven hydraulic valves with fault detection via analog watchdog and independent watchdog. Use Value: Dual watchdog architecture (window + independent) and 150 °C rating ensure fail-safe behavior during extended high-load operation. |
Use Scenario: Torque assist calculation and motor phase commutation in brushless EPS systems. IC Role / Device Role / Timing Role: Motor control MCU generating complementary PWM signals with dead-time insertion via TIM1 for inverter gate drivers. Use Value: Hardware dead-time insertion prevents shoot-through in 3-phase inverter bridges-eliminating need for external protection logic. |
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 |
|---|---|---|---|
| STM8AF6266TDX | Same package and core, but 16 Kbyte Flash and 0.5 Kbyte EEPROM; no TIM1 advanced control timer. | Suitable for simpler LIN gateway or sensor nodes where motor control or large firmware is unnecessary. | Select when cost sensitivity outweighs need for 32 Kbyte code space or advanced PWM features. |
| RL78/F13 | Renesas RL78 core; 24 MHz max, 128 Kbyte Flash, 10-bit ADC, but lacks integrated LINPHY and AEC-Q100 Grade 0 rating. | Used in mid-tier infotainment or telematics modules-not certified for under-hood deployment. | Choose only if higher Flash capacity and lower active current are prioritized over automotive-grade temperature and LIN compliance. |
Compared with STM8AF6266TDX, the STM8AF6268TDX adds critical motor control capability via TIM1 and doubles EEPROM for calibration storage; versus RL78/F13, it trades raw performance for guaranteed AEC-Q100 Grade 0 operation and native LIN 2.2 hardware support-making it uniquely suited for safety-critical powertrain roles.
Availability
STM8AF6268TDX is available at Aetrix Electronics and suitable for engine control units, transmission control units, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6268TDX 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-sensitive, high-reliability embedded control applications-including powertrain, chassis, and body electronics-with emphasis on AEC-Q100 compliance, extended temperature operation, and functional safety readiness.
FAQ
What is the maximum operating temperature of the STM8AF6268TDX?
The STM8AF6268TDX is qualified for continuous operation from −40 °C to +150 °C per AEC-Q100 Grade 0 requirements. This rating is validated across all electrical parameters-including Flash retention, ADC accuracy, and oscillator stability-and applies to the full VFQFPN32 package under specified thermal conditions.
Does the STM8AF6268TDX support in-circuit debugging?
Yes-it features a Single-Wire Interface Module (SWIM) that enables full-speed in-circuit debugging and programming using only one bidirectional pin. No JTAG header or additional debug pins are required, simplifying PCB layout and reducing test fixture complexity during development and production.
How many LIN nodes can the STM8AF6268TDX manage simultaneously?
The integrated LINUART supports both master and slave modes with automatic resynchronization, allowing the device to operate as a single LIN master controlling up to 16 slave nodes-or as a LIN slave node in a larger network. It does not support multiple concurrent LIN buses; only one LIN physical layer is implemented.
Is the 1 Kbyte data EEPROM truly EEPROM or emulated in Flash?
It is true hardware EEPROM-dedicated silicon circuitry distinct from Flash memory-providing guaranteed 300,000 write/erase cycles and data retention of 20 years at 55 °C. Unlike Flash-emulated EEPROM, it supports byte-level writes without block erasure and operates independently of Flash programming voltage.
STM8AF6268TDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM8A
- Packaging:
- Tape & Reel (TR)
- 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:
- 38
- 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 10x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6268TDX FAQ
1.How can I place an order for STM8AF6268TDX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6268TDX 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 STM8AF6268TDX reliable?
The price and inventory of STM8AF6268TDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6268TDX is usually 5 days.
3.What payment methods are accepted for STM8AF6268TDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6268TDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6268TDX?
STM8AF6268TDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6268TDX 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 STM8AF6268TDX?
For technical support, including STM8AF6268TDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6268TDX requirements.
6.How does Aetrix verify that STM8AF6268TDX is sourced from the original manufacturer or authorized distributors?
All STM8AF6268TDX 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 STM8AF6268TDX meets industry standards.
7.What is the process for return or replacement of STM8AF6268TDX?
All STM8AF6268TDX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6268TDX, 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 STM8AF6268TDX part is unused and in its original packaging.
Return procedure for STM8AF6268TDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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