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STMicroelectronics STM8AF6268TDY
- Part No.:
- STM8AF6268TDY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AF6268TDY.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,982
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Product details
Overview
STM8AF6268TDY from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 32 Kbyte Flash program memory with 20-year data retention at 55 °C, 1 Kbyte true data EEPROM (300 kcycle endurance), and integrated 10-bit ADC with 2 LSB TUE accuracy across up to 10 channels. It supports LIN 2.2-compliant communication, SPI up to 8 Mbit/s, I²C up to 400 Kbit/s, and operates from 3 to 5.5 V in ambient temperatures up to 150 °C - deployed in engine control modules and body electronics.
For engineers reviewing the STM8AF6268TDY datasheet, STM8AF6268TDY pinout, STM8AF6268TDY application, or STM8AF6268TDY equivalent, key selection criteria include AEC-Q100 Grade 0 qualification, VFQFPN32 (5×5 mm) package compatibility, LINUART master/slave resynchronization capability, 16-bit advanced control timer with dead-time insertion, and 10-bit ADC scan mode with analog watchdog.
Technical Context
The STM8AF6268TDY implements a Harvard-architecture STM8A CPU with 3-stage pipeline, delivering 10 MIPS at 16 MHz via average 1.6 cycles/instruction execution. Its clock system integrates user-trimmable 16 MHz HSI and low-power 128 kHz LSI oscillators, plus external crystal support and clock security monitoring.
Interrupt handling uses a nested controller with 32 vectors and up to 34 external interrupts mapped across 5 vectors. Memory subsystem includes separate Flash (32 KB), true data EEPROM (1 KB), and 2 KB RAM, all supporting automotive-grade reliability under extended temperature and voltage stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic real-time response in safety-critical automotive functions. |
| Max fCPU | 16 MHz at 3–5.5 V supply; supports timing-critical LIN frame generation and PWM motor control without external clocking. |
| Flash Memory | 32 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; suitable for field-updatable firmware in long-lifecycle vehicles. |
| Data EEPROM | 1 Kbyte true data EEPROM with 300 kcycle endurance; stores calibration data, fault logs, and configuration parameters across vehicle service life. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB total unadjusted error (TUE); provides sufficient precision for throttle position, coolant temperature, and battery voltage sensing. |
| LIN Compliance | LIN 2.2 compliant UART with automatic resynchronization; eliminates need for external LIN transceiver in cost-sensitive sub-systems like door modules. |
| Operating Temp | −40 °C to +150 °C ambient; validated for under-hood deployment including engine control units and transmission control modules. |
| Supply Voltage | 3.0 V to 5.5 V operation; compatible with both 3.3 V and 5 V automotive power domains without level-shifting. |
Pinout & Package
STM8AF6268TDY is housed in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with exposed thermal pad for enhanced heat dissipation in high-temperature automotive environments.
| 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 robustness. |
| VSS | Ground reference | Digital ground return; must be connected to low-impedance chassis ground plane to minimize noise coupling into ADC and timers. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.2–5.5 V logic levels and supports external watchdog reset injection. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with HS capability; configurable as LINUART TX/RX, SPI SCK/MOSI/MISO, or ADC inputs CH0–CH7. |
| PB0–PB7 | General-purpose I/O port B | 8-bit port supporting TIM1/2/3/4 CAPCOM, I²C SCL/SDA, and external interrupt sources INT0–INT3. |
| PC0–PC7 | General-purpose I/O port C | 8-bit port with alternate functions for ADC CH8/CH9, SPI NSS, and advanced timer complementary outputs (TIM1_CH1N–CH3N). |
| PD0–PD7 | General-purpose I/O port D | 8-bit port supporting auto-wakeup timer input, beeper output, and SWIM debug interface (PD0/PD1). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation with full electrical characterization; meets automotive functional safety baseline requirements. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, programmable dead-time insertion, and synchronization with other peripherals - enables precise 3-phase motor gate drive. |
| Single-wire interface module (SWIM) | On-chip debug interface using only PD0 pin; allows full flash programming, breakpoint setting, and register inspection without JTAG header footprint. |
| Low-power modes with clock gating | Wait, auto-wakeup, and Halt modes with per-peripheral clock enable/disable control; reduces active current to 230 µA in Wait mode @ 16 MHz. |
| Analog watchdog & scan mode | Configurable threshold monitoring on any ADC channel with automatic restart on violation; supports continuous background sensor health checking without CPU intervention. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time management of fuel injection timing, ignition spark advance, and knock detection using crank/cam sensor inputs. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop control algorithms with deterministic 16 MHz instruction throughput and hardware-accelerated PWM generation. Use Value: Integrated 10-bit ADC with scan mode and analog watchdog ensures reliable sensor data acquisition; LINUART enables communication with dashboard and diagnostic tools. |
Use Scenario: Centralized control of lighting, window lift, mirror adjustment, and door lock actuation in passenger compartment. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slave nodes (e.g., seat controllers, HVAC actuators) via built-in LIN 2.2 UART. Use Value: 32 Kbyte Flash accommodates multi-feature firmware; 1 Kbyte EEPROM stores user preferences and fault history across vehicle lifetime. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
|
Use Scenario: Gear shift scheduling, clutch pressure modulation, and torque converter lock-up control based on vehicle speed and throttle position. IC Role / Device Role / Timing Role: Safety-relevant controller with dual-clock monitoring (HSI + HSE), independent watchdog, and memory ECC protection for ASIL-B decomposition. Use Value: Advanced control timer (TIM1) delivers synchronized 3-phase PWM with dead-time insertion for solenoid driver ICs; 150 °C rating supports under-transmission tunnel mounting. |
Use Scenario: Torque assist calculation and motor phase current regulation using steering angle, torque, and vehicle speed inputs. IC Role / Device Role / Timing Role: Real-time motor controller with 16-bit PWM resolution, ADC sampling at ≥100 kS/s, and fast interrupt latency (<2 µs). Use Value: High-sink I/O pins directly drive gate drivers; LIN interface communicates with vehicle CAN gateway via LIN-to-CAN bridge node. |
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 |
|---|---|---|---|
| STM8AF6266TDY | 24 Kbyte Flash, 0.5 Kbyte EEPROM, same VFQFPN32 package and peripheral set. | Suitable for reduced-feature ECUs where firmware size <24 KB and calibration storage <512 bytes suffice. | Select when cost optimization is prioritized over future firmware scalability or extended data logging capacity. |
| RL78/F13 | Renesas RL78 core, 16 MHz max, 32 Kbyte Flash, but lacks LIN 2.2 hardware UART and AEC-Q100 Grade 0 validation. | Requires external LIN transceiver and additional qualification effort for under-hood use. | Consider only for non-critical cabin applications where AEC-Q100 Grade 0 is not mandated and LIN is implemented externally. |
Compared with STM8AF6266TDY, the STM8AF6268TDY offers 8 Kbyte more Flash and 512 bytes more EEPROM for enhanced feature integration and diagnostics; versus RL78/F13, it delivers native LIN 2.2 compliance and full Grade 0 qualification - reducing BOM count and validation overhead in production automotive systems.
Availability
STM8AF6268TDY is available at Aetrix Electronics and suitable for engine control units, body control modules, transmission control units, and electric power steering systems requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF6268TDY 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 specializing in automotive, industrial, and power management solutions, with over 40 years of microcontroller innovation and ISO/TS 16949-certified manufacturing.
The STM8A automotive MCU product line targets cost-sensitive, high-reliability applications in powertrain, chassis, and body electronics - designed for AEC-Q100 compliance, extended temperature operation, and seamless integration with ST's ecosystem of development tools and software libraries.
FAQ
What is the maximum operating junction temperature for STM8AF6268TDY?
The device is rated for ambient temperatures from −40 °C to +150 °C and has a maximum junction temperature of +175 °C under specified thermal conditions. Thermal resistance θJA is 42 °C/W for the VFQFPN32 package, requiring proper PCB copper pour and thermal vias to maintain safe junction limits during sustained 16 MHz operation.
Does STM8AF6268TDY support in-circuit debugging without dedicated debug headers?
Yes - it features Single-Wire Interface Module (SWIM) debug capability accessible via PD0 pin only. This allows full flash programming, real-time variable inspection, and breakpoint execution using ST-LINK/V2 or compatible debug probes, eliminating the need for 4-pin SWD/JTAG connectors and saving board space.
Can the 10-bit ADC perform simultaneous sampling across multiple channels?
No - the ADC is single-core with multiplexed inputs and supports sequential scan mode, not true simultaneous sampling. However, conversion time is ≤2.2 µs per channel at fADC = 14 MHz, enabling effective pseudo-simultaneous acquisition for up to 10 channels within <22 µs total cycle time.
Is the LINUART peripheral capable of acting as both master and slave in the same firmware build?
Yes - the LINUART supports runtime-configurable master/slave mode selection via control registers. Automatic resynchronization allows robust frame recovery during bus disturbances, and break detection/interrupt generation enables dynamic role switching in distributed architectures such as multi-node lighting control networks.
STM8AF6268TDY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM8A
- Packaging:
- Tray
- 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:
STM8AF6268TDY FAQ
1.How can I place an order for STM8AF6268TDY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6268TDY 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 STM8AF6268TDY reliable?
The price and inventory of STM8AF6268TDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6268TDY is usually 5 days.
3.What payment methods are accepted for STM8AF6268TDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6268TDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6268TDY?
STM8AF6268TDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6268TDY 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 STM8AF6268TDY?
For technical support, including STM8AF6268TDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6268TDY requirements.
6.How does Aetrix verify that STM8AF6268TDY is sourced from the original manufacturer or authorized distributors?
All STM8AF6268TDY 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 STM8AF6268TDY meets industry standards.
7.What is the process for return or replacement of STM8AF6268TDY?
All STM8AF6268TDY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6268TDY, 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 STM8AF6268TDY part is unused and in its original packaging.
Return procedure for STM8AF6268TDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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