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STMicroelectronics STM8AF6248TAY
- Part No.:
- STM8AF6248TAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AF6248TAY.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,258
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Product details
Overview
STM8AF6248TAY 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), I²C (up to 400 Kbit/s), and advanced timers including a 16-bit advanced control timer with dead-time insertion - deployed in engine control units and body electronics requiring operation up to 150 °C.
For engineers reviewing the STM8AF6248TAY datasheet, STM8AF6248TAY pinout, STM8AF6248TAY application, or STM8AF6248TAY equivalent, key selection criteria include AEC-Q100 Grade 0 qualification, 150 °C operating temperature, LINUART master/slave capability with automatic resynchronization, 38-pin I/O count with 10 high-speed pins, and dual internal RC oscillators (16 MHz HSI + 128 kHz LSI) with clock security system.
Technical Context
The STM8AF6248TAY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, delivering 10 MIPS at 16 MHz. Its clock system integrates trimmable 16 MHz HSI and low-power 128 kHz LSI oscillators, plus external crystal support and clock security monitoring to detect failure and trigger reset.
Interrupt handling uses a nested controller with 32 vectors and up to 34 external interrupts mapped across 5 vectors. Analog subsystem includes a 10-bit ADC with 2 LSB TUE accuracy, scan mode, analog watchdog, and individual data buffers per channel - enabling precise sensor acquisition in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time execution for safety-critical automotive firmware. |
| Max fCPU | 16 MHz at 3–5.5 V supply; delivers 10 MIPS performance for LIN protocol timing and PWM generation without external clock dependency. |
| Flash Memory | 32 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; supports field firmware updates in vehicle ECUs. |
| Data EEPROM | 1 Kbyte true data EEPROM with 300 kcycle endurance; stores calibration data, odometer values, and configuration parameters reliably over vehicle lifetime. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB total unadjusted error (TUE); ensures accurate temperature, pressure, and battery voltage sensing under thermal stress. |
| Operating Temperature | −40 °C to +150 °C ambient; validated for under-hood applications including transmission control modules and powertrain sensors. |
| LIN Compliance | LIN 2.2 compliant UART with automatic resynchronization; eliminates need for external LIN transceiver in cost-sensitive body control modules. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch) with 48 leads; thermally enhanced for automotive under-hood mounting and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3–5.5 V supply rail; decoupled via external 100 nF capacitor to ensure stable core and peripheral operation during load transients. |
| VSS | Ground reference | Dedicated digital ground plane connection; separate from analog ground (VSSA) to minimize noise coupling into ADC measurements. |
| NRST | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts external reset IC or microcontroller-initiated reset for fail-safe recovery. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with configurable pull-ups; supports alternate functions including TIM1/2 channels, ADC inputs, and SPI signals. |
| PC0–PC7 | General-purpose I/O port C | 8-bit port supporting LINUART TX/RX, I²C SCL/SDA, and TIM3/4 outputs; includes high-sink capability for direct LED drive. |
| PD0–PD7 | General-purpose I/O port D | 8-bit port with remappable alternate functions; used for ADC external trigger, beeper output, and auto-wakeup timer input. |
| PF0–PF7 | General-purpose I/O port F | 8-bit port supporting SWIM debug interface and clock security system monitor; critical for production programming and runtime fault detection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation with full electrical characterization - meets automotive powertrain and chassis system requirements. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - enables precise 3-phase motor gate driving. |
| Integrated LINUART | Hardware LIN 2.2 implementation with automatic resynchronization and slave ID detection - reduces BOM cost and software overhead in body networks. |
| True data EEPROM | 1 Kbyte on-chip EEPROM with 300 kcycle endurance and byte-level erase - eliminates external nonvolatile memory in seat control and lighting modules. |
| Low-power modes | Wait, Auto-wakeup, and Halt modes with user-definable clock gating - achieves sub-1 µA current draw in sleep state for always-on vehicle systems. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time management of fuel injection timing, ignition spark advance, and throttle position feedback in gasoline engines. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop control algorithms with deterministic interrupt latency and LIN communication to dashboard cluster. Use Value: 16 MHz CPU and 10-bit ADC with analog watchdog enable precise air-fuel ratio calculation and fault detection within 10 µs response window. |
Use Scenario: Centralized control of door locks, interior lighting, window lifters, and mirror adjustment in passenger vehicles. IC Role / Device Role / Timing Role: LIN master node coordinating distributed slave nodes (e.g., seat module, mirror ECU) via hardware LINUART with automatic sync recovery. Use Value: Integrated LIN 2.2 and 38 GPIOs reduce external components and PCB area while supporting multi-voltage I/O (3.3 V/5 V) for legacy sensor interfacing. |
| Transmission Control Module (TCM) | Heating/Ventilation Control Unit (HVAC) |
Use Scenario: Monitoring gear position sensors, turbine speed, and solenoid valve drivers in automatic transmissions. IC Role / Device Role / Timing Role: Safety-relevant controller managing PWM-driven solenoids with dead-time protected outputs from TIM1 advanced timer. Use Value: 150 °C rated operation and AEC-Q100 qualification ensure reliability in high-temperature transmission oil environments without derating. |
Use Scenario: Regulating blower motor speed, blend door actuation, and cabin temperature feedback using NTC thermistors and PWM fans. IC Role / Device Role / Timing Role: Sensor fusion hub acquiring analog HVAC sensor data via 10-channel ADC and driving actuators through general-purpose timers. Use Value: 1 Kbyte EEPROM stores user preference profiles and calibration offsets across vehicle lifetime, eliminating need for backup battery or external NV memory. |
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 |
|---|---|---|---|
| STM8AF6268TAY | Same package and pinout; adds 2 Kbyte RAM (vs. 2 Kbyte in STM8AF6248TAY) and second I²C interface. | Preferred for designs requiring dual I²C buses (e.g., connecting both ambient and cabin temperature sensors independently). | Select when additional RAM or redundant I²C is required; otherwise identical toolchain and qualification profile. |
| RL78/F13-BS | Renesas RL78 core; 24 MHz max fCPU, 128 Kbyte Flash, but only AEC-Q100 Grade 2 (−40 °C to +105 °C). | Suitable for non-under-hood applications like infotainment interfaces where extended temperature range is not required. | Choose only if higher Flash capacity and lower power in active mode outweigh loss of 150 °C rating and LIN hardware integration. |
Compared with STM8AF6268TAY, the STM8AF6248TAY offers identical automotive qualification and LIN functionality at lower cost and smaller Flash footprint; versus RL78/F13-BS, it provides superior thermal robustness and integrated LIN, making it optimal for under-hood control where reliability trumps raw processing headroom.
Availability
STM8AF6248TAY is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control modules requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6248TAY 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 STM8A automotive MCU product line targets cost-sensitive, high-reliability embedded control applications in powertrain, chassis, and body electronics - emphasizing AEC-Q100 compliance, extended temperature operation, and integrated LIN/UART peripherals.
FAQ
What is the maximum junction temperature specification for STM8AF6248TAY?
The STM8AF6248TAY is rated for operation up to +150 °C ambient temperature and has a maximum junction temperature of +165 °C under specified thermal conditions. This rating is validated per AEC-Q100 Grade 0 requirements and confirmed in Section 10.3 of the official datasheet (DocID14952 Rev 11, page 52).
Does STM8AF6248TAY support in-circuit debugging via SWIM interface?
Yes, the STM8AF6248TAY features a Single Wire Interface Module (SWIM) on pin PF0, enabling full-speed in-circuit debugging, flash programming, and real-time variable inspection using ST-LINK/V2 or compatible debug probes - documented in Section 5.2.1 of the datasheet.
How many LIN nodes can STM8AF6248TAY manage as a master?
The STM8AF6248TAY's LINUART supports master-mode operation with automatic resynchronization and slave ID detection, but it is designed as a single-master node per UART instance. It does not implement multi-master arbitration; one STM8AF6248TAY controls one LIN subnetwork, typically serving 2–16 slave nodes depending on bus loading and timing constraints.
Is the 1 Kbyte data EEPROM accessible during code execution?
Yes, the 1 Kbyte true data EEPROM supports concurrent read-while-write operation: code execution from Flash continues uninterrupted during EEPROM write/erase cycles. This is enabled by independent memory banks and verified in Section 5.4.1 of the datasheet (memory architecture diagram, page 15).
STM8AF6248TAY 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:
- 16MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 512 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6248TAY FAQ
1.How can I place an order for STM8AF6248TAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6248TAY 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 STM8AF6248TAY reliable?
The price and inventory of STM8AF6248TAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6248TAY is usually 5 days.
3.What payment methods are accepted for STM8AF6248TAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6248TAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6248TAY?
STM8AF6248TAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6248TAY 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 STM8AF6248TAY?
For technical support, including STM8AF6248TAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6248TAY requirements.
6.How does Aetrix verify that STM8AF6248TAY is sourced from the original manufacturer or authorized distributors?
All STM8AF6248TAY 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 STM8AF6248TAY meets industry standards.
7.What is the process for return or replacement of STM8AF6248TAY?
All STM8AF6248TAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6248TAY, 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 STM8AF6248TAY part is unused and in its original packaging.
Return procedure for STM8AF6248TAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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