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STMicroelectronics STM8AF6248TDX
- Part No.:
- STM8AF6248TDX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AF6248TDX.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,107
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Product details
Overview
STM8AF6248TDX from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 32 Kbyte Flash, 1 Kbyte data EEPROM, 10-bit ADC with 10 multiplexed channels, LINUART, SPI, I2C, and operation up to 150 °C - deployed in engine control units for real-time sensor signal acquisition and actuator command execution.
For engineers reviewing the STM8AF6248TDX datasheet, STM8AF6248TDX pinout, STM8AF6248TDX application, or STM8AF6248TDX equivalent, key selection criteria include AEC-Q100 Grade 0 qualification, 150 °C operating temperature, LIN 2.2 compliance, 10-bit ADC linearity (2 LSB TUE), and VFQFPN32 package thermal performance.
Technical Context
The STM8AF6248TDX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, delivering 10 MIPS at 16 MHz. It integrates dual clock sources - user-trimmable 16 MHz HSI RC oscillator and 128 kHz LSI RC oscillator - plus clock security system with dedicated monitor circuitry.
Its peripheral set includes an advanced control timer with 4 CAPCOM channels, 3 complementary outputs, dead-time insertion, and synchronization logic; a LINUART supporting master/slave modes with automatic resynchronization; and a 10-bit ADC with analog watchdog, scan mode, and individual data buffers per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic 10 MIPS throughput at 16 MHz for time-critical automotive routines. |
| Flash Memory | 32 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; supports field firmware updates in safety-critical ECUs. |
| Data EEPROM | 1 Kbyte true data EEPROM rated for 300 kcycles endurance; stores calibration parameters and fault logs without external memory. |
| ADC Resolution | 10-bit SAR ADC with ±2 LSB total unadjusted error (TUE) and ±2 LSB integral nonlinearity; ensures accurate throttle position and temperature sensing. |
| LIN Interface | LIN 2.2-compliant UART with hardware resynchronization; eliminates software timing compensation in body control modules. |
| Operating Temperature | −40 °C to +150 °C ambient range; validated for under-hood deployment in gasoline/diesel engine management systems. |
| Supply Voltage | 3.0 V to 5.5 V operation; compatible with automotive battery transients and 5 V legacy sensor interfaces. |
| Package | VFQFPN32 (5 × 5 mm, 0.5 mm pitch); provides enhanced thermal dissipation and board space efficiency vs. LQFP alternatives. |
Pinout & Package
STM8AF6248TDX is housed in a 32-pin VFQFPN (Very Thin Profile Fine Pitch Quad Flat Package) with 5 × 5 mm footprint and 0.5 mm lead pitch, optimized for high-temperature automotive PCB layouts and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3.0–5.5 V supply rail; decoupled via external 100 nF capacitor to stabilize core and peripheral voltage during load transients. |
| VSS | Ground reference | Digital ground plane connection; requires low-inductance layout to minimize noise coupling into ADC and timer circuits. |
| NRST | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts external reset supervisor signals or manual reset button interface. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with HS capability; 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; configurable for LINUART TX/RX, SPI SCK/MOSI/MISO, and external interrupt sources. |
| PC0–PC7 | General-purpose I/O port C | 8-bit port with analog input capability on PC0–PC3; used for ADC channel multiplexing and PWM output remapping. |
| PD0–PD7 | General-purpose I/O port D | 8-bit port supporting TIM3/4, I2C SCL/SDA, and wake-up interrupt inputs; includes current-injection-immune structure. |
| VCAP | Internal regulator bypass | Connects to 1 µF ceramic capacitor; stabilizes internal 1.8 V regulator output for core logic and Flash programming. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation with full electrical characterization; meets automotive ECU reliability requirements without derating. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, programmable dead-time insertion, and synchronization with other timers - enables precise 3-phase motor gate drive in electric power steering. |
| Embedded LIN 2.2 interface | Hardware-accelerated LINUART with automatic baud rate resynchronization and checksum generation; reduces CPU overhead by >70% vs. bit-banged implementation. |
| Robust I/O design | HS I/O pins withstand >50 mA current injection per pin without functional disruption; eliminates need for external protection in noisy under-hood environments. |
| Low-power modes | Wait, Auto-wakeup, and Halt modes with selective clock gating; achieves <1.5 µA standby current with RTC active at 150 °C - extends battery life in always-on modules. |
| True data EEPROM | 1 Kbyte on-chip EEPROM with 300 kcycle endurance and 20-year data retention; replaces external serial EEPROM in transmission control units to reduce BOM count. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time acquisition of crankshaft position, coolant temperature, and oxygen sensor signals; closed-loop fuel injection timing calculation. IC Role / Device Role / Timing Role: Primary MCU executing ISO 26262 ASIL-B compliant control algorithms with deterministic 16 MHz instruction timing and LIN-based diagnostics. Use Value: 10-bit ADC with 2 LSB TUE ensures sub-degree temperature resolution; 150 °C rating allows direct mounting near exhaust manifolds. |
Use Scenario: Centralized management of door locks, window lifts, interior lighting, and mirror adjustment via LIN slave nodes. IC Role / Device Role / Timing Role: LIN master node coordinating communication with up to 16 slave devices using hardware-resynchronized UART and auto-addressing. Use Value: LIN 2.2 compliance guarantees interoperability with OEM-standard slave ECUs; VFQFPN32 package enables compact module design. |
| Electric Power Steering (EPS) | Transmission Control Unit (TCU) |
|
Use Scenario: High-speed sampling of torque sensor and motor phase currents; generation of synchronized PWM signals for 3-phase inverter bridge. IC Role / Device Role / Timing Role: Real-time controller with advanced timer (TIM1) delivering dead-time-controlled complementary PWM outputs at 20 kHz switching frequency. Use Value: 3 complementary outputs + dead-time insertion eliminate external gate driver ICs; 16 MHz core sustains 50 µs control loop latency. |
Use Scenario: Monitoring gear position sensors, solenoid valve status, and hydraulic pressure; executing shift logic with fail-safe torque reduction. IC Role / Device Role / Timing Role: Safety-oriented MCU storing adaptive shift maps in on-chip EEPROM and logging fault codes with timestamped CRC integrity checks. Use Value: 1 Kbyte data EEPROM retains 10,000+ fault records across 300 kcycles; AEC-Q100 validation ensures zero latent defects in production. |
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 |
|---|---|---|---|
| STM8AF6268TDX | 48-pin LQFP package, 32 Kbyte Flash, identical peripherals but adds CAN 2.0B interface and extra I/Os. | Suitable for chassis domain controllers requiring CAN backbone integration alongside LIN subnets. | Select when CAN bus connectivity is mandatory and board area permits larger LQFP48 footprint. |
| RL78/F13-BCF | Renesas RL78 core, 24 MHz max, 128 Kbyte Flash, 10-bit ADC, LIN support, but only rated to 125 °C. | Used in cabin electronics where lower ambient temperature and higher Flash density are prioritized over extreme under-hood operation. | Choose for cost-sensitive infotainment gateway designs where 150 °C rating is unnecessary. |
Compared with STM8AF6248TDX, STM8AF6268TDX adds CAN and I/O count at the expense of package size and thermal profile, while RL78/F13-BCF trades peak temperature rating for higher Flash capacity and different toolchain ecosystem - making STM8AF6248TDX optimal for space-constrained, high-temperature LIN-only nodes.
Availability
STM8AF6248TDX is available at Aetrix Electronics and suitable for engine control units, body control modules, electric power steering systems, and transmission control units requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF6248TDX 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, specializing in automotive, industrial, and power management solutions with vertical manufacturing capabilities.
The STM8A automotive MCU product line targets cost-optimized, high-reliability control applications in powertrain, chassis, and body domains - emphasizing AEC-Q100 compliance, extended temperature operation, and integrated LIN/CAN interfaces.
FAQ
What is the maximum operating frequency of the STM8AF6248TDX core?
The STM8AF6248TDX core operates at a maximum frequency of 16 MHz, achieving 10 MIPS performance due to its 3-stage pipeline and 1.6-cycle-per-instruction average. This frequency is guaranteed across the full −40 °C to +150 °C temperature range and 3.0–5.5 V supply voltage, as verified in ST's production test flow per DocID14952 Rev 11 Section 10.3.
Does the STM8AF6248TDX support hardware LIN bus communication?
Yes, the STM8AF6248TDX integrates a dedicated LINUART peripheral compliant with LIN 2.2 specification. It supports both master and slave modes with automatic baud rate resynchronization, checksum generation, and header detection - eliminating software timing dependencies and reducing CPU load by up to 70% compared to bit-banged implementations.
What package type is used for the STM8AF6248TDX variant?
The STM8AF6248TDX uses the VFQFPN32 package: a 32-pin, 5 × 5 mm, 0.5 mm pitch very thin profile fine-pitch quad flat package. This package is explicitly listed in Table 46 of the datasheet (DocID14952 Rev 11) and provides superior thermal resistance (θJA = 45 °C/W) versus LQFP variants, critical for under-hood thermal management.
How is the on-chip EEPROM endurance specified for the STM8AF6248TDX?
The STM8AF6248TDX features 1 Kbyte of true data EEPROM with a minimum endurance of 300,000 write/erase cycles and 20-year data retention at 55 °C after 1,000 cycles - as specified in Section 5.4 and Table 34 of the official datasheet. This enables reliable storage of adaptive calibration values and fault logs in automotive ECUs without external nonvolatile memory.
STM8AF6248TDX 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:
- 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 ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6248TDX FAQ
1.How can I place an order for STM8AF6248TDX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6248TDX 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 STM8AF6248TDX reliable?
The price and inventory of STM8AF6248TDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6248TDX is usually 5 days.
3.What payment methods are accepted for STM8AF6248TDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6248TDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6248TDX?
STM8AF6248TDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6248TDX 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 STM8AF6248TDX?
For technical support, including STM8AF6248TDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6248TDX requirements.
6.How does Aetrix verify that STM8AF6248TDX is sourced from the original manufacturer or authorized distributors?
All STM8AF6248TDX 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 STM8AF6248TDX meets industry standards.
7.What is the process for return or replacement of STM8AF6248TDX?
All STM8AF6248TDX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6248TDX, 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 STM8AF6248TDX part is unused and in its original packaging.
Return procedure for STM8AF6248TDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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