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STMicroelectronics STM8AF6248TCX
- Part No.:
- STM8AF6248TCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AF6248TCX.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,492
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Product details
Overview
STM8AF6248TCX 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 STM8AF6248TCX datasheet, STM8AF6248TCX pinout, STM8AF6248TCX application, or STM8AF6248TCX equivalent, key selection criteria include automotive-grade temperature range (–40 to 150 °C), LINUART compliance, embedded data EEPROM endurance (300 kcycle), dual RC oscillators (16 MHz HSI + 128 kHz LSI), and 38-pin I/O capability with high-sink robustness.
Technical Context
The STM8AF6248TCX 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 user-trimmable 16 MHz internal RC (HSI), low-power 128 kHz RC (LSI), and external crystal oscillator support with clock security monitoring.
Interrupt handling uses a nested controller with 32 vectors and up to 34 external interrupts mapped across five priority levels. Analog subsystem includes a 10-bit ADC with 2 LSB total unadjusted error, individual channel data buffers, scan mode, and analog watchdog - all qualified for automotive sensor interfacing under extended temperature 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 firmware. |
| Max Clock Frequency | 16 MHz fCPU; achieves 10 MIPS benchmark performance while maintaining low power consumption in active modes. |
| 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 rated for 300 kwrite cycles; retains calibration data, fault logs, and configuration parameters across vehicle lifetime. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB TUE accuracy and linearity; meets ASIL-B signal acquisition requirements for throttle position and temperature sensing. |
| Operating Temperature | –40 °C to +150 °C ambient; validated for under-hood deployment including transmission control modules and battery management interfaces. |
| Supply Voltage Range | 3.0 V to 5.5 V; compatible with 5 V legacy automotive bus systems and tolerant of load-dump transients when coupled with external protection. |
| LIN Compliance | LIN 2.2 compliant UART with automatic resynchronization; enables direct integration into distributed body control networks without external protocol translators. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, automotive-qualified lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3.0–5.5 V supply rail; requires local 100 nF ceramic decoupling per VDD pin for EMC robustness in noisy automotive environments. |
| VSS | Ground reference | Dedicated 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 pin with internal pull-up; accepts external RC reset circuit or microcontroller-driven reset assertion during ECU boot sequence. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with configurable pull-ups, interrupt-on-change, and alternate function remapping for TIM1/ADC/SPI signals. |
| PB0–PB7 | General-purpose I/O port B | 8-bit port supporting LINUART TX/RX, I²C SCL/SDA, and high-sink capability (20 mA per pin) for direct LED or relay driver interface. |
| 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 via TIM2/TIM3 CAPCOM units. |
| PD0–PD7 | General-purpose I/O port D | 8-bit port supporting SPI NSS/MOSI/MISO/SCK and advanced timer complementary outputs with dead-time insertion for motor gate drive. |
| PE0–PE7 | General-purpose I/O port E | 8-bit port with dedicated SWIM debug interface pins (PE0/PE1); enables single-wire in-circuit programming and real-time debugging without JTAG overhead. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for operation up to +150 °C ambient; eliminates derating concerns in engine bay and transmission control applications. |
| Embedded data EEPROM | 1 Kbyte true EEPROM with 300 kcycle endurance; stores adaptive learning values and diagnostic trouble codes without external serial EEPROM. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and hardware dead-time insertion; enables precise 3-phase motor commutation control. |
| Low-power clock system | Independent 128 kHz LSI oscillator + auto-wakeup timer; allows sub-1 µA halt-mode current draw while retaining RTC-like wake-up capability. |
| Robust I/O design | Immunity to current injection up to 100 mA per pin; prevents latch-up during ESD events and load dump transients in 12 V vehicle systems. |
| Single-wire interface module (SWIM) | On-chip debug interface using only PE0/PE1 pins; reduces PCB routing complexity and enables firmware updates over existing wiring harnesses. |
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: Primary MCU executing closed-loop fuel injection timing, spark advance calculation, and OBD-II diagnostics. Use Value: 16 MHz deterministic execution and 10-bit ADC with analog watchdog ensure accurate sensor sampling under transient thermal conditions up to 150 °C. |
Use Scenario: Centralized control of door locks, window lifts, interior lighting, and mirror adjustment in passenger vehicles. IC Role / Device Role / Timing Role: LIN master node coordinating slave actuators via LIN 2.2 frames with automatic resynchronization. Use Value: Integrated LINUART eliminates external transceiver, reducing BOM cost and PCB area while maintaining interoperability with legacy LIN sensors. |
| Transmission Control Unit (TCU) | Battery Management Interface |
Use Scenario: Gear shift logic, solenoid driver control, and torque converter clutch management in automatic transmissions. IC Role / Device Role / Timing Role: High-reliability timing source for PWM-controlled hydraulic valve drivers using TIM1's complementary outputs and dead-time insertion. Use Value: Hardware dead-time prevents shoot-through in half-bridge solenoid drivers; 38 I/O pins support direct connection to 12+ solenoids and feedback sensors. |
Use Scenario: Monitoring cell voltage, pack temperature, and charge/discharge current in 12 V auxiliary battery systems. IC Role / Device Role / Timing Role: Signal conditioner and communication gateway between analog front-end sensors and CAN/LIN vehicle network. Use Value: 10-channel ADC with individual data buffers enables simultaneous sampling of 8 thermistors and 2 shunt-based current measurements without software overhead. |
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 |
|---|---|---|---|
| STM8AF6268TCX | Same core and peripherals but with 64 Kbyte Flash and 2 Kbyte RAM; identical pinout and temperature rating. | Supports larger firmware images for OTA-capable ECUs and complex state machines in ADAS domain controllers. | Select when future firmware expansion headroom or additional RAM for real-time data buffering is required. |
| RL78/F13 | Renesas RL78 core (16-bit), 32 Kbyte Flash, 2.7–5.5 V supply, –40 to 125 °C rating; lacks LINUART but adds CAN 2.0B. | Suitable for mid-tier infotainment gateways where CAN backbone integration outweighs LIN requirement. | Choose only if CAN interface is mandatory and operating temperature ≤ 125 °C suffices for target placement. |
Compared with STM8AF6268TCX, the STM8AF6248TCX trades Flash/RAM capacity for lower cost and power in space-constrained ECUs; versus RL78/F13, it delivers superior high-temperature resilience and native LIN support at the expense of 16-bit processing and CAN capability.
Availability
STM8AF6248TCX is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control applications requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6248TCX 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 discrete technologies with vertical manufacturing capabilities.
The STM8A product line targets cost-sensitive, high-reliability automotive applications including powertrain, chassis, and body electronics, emphasizing AEC-Q100 qualification, extended temperature operation, and embedded nonvolatile memory integration.
FAQ
What is the maximum operating junction temperature for STM8AF6248TCX?
The device is rated for ambient operation from –40 °C to +150 °C and has a maximum junction temperature of +165 °C under specified thermal conditions. This is validated per AEC-Q100 Grade 0 test requirements and confirmed by thermal resistance data (RθJA = 40 °C/W for LQFP48) in the official datasheet revision 11.
Does STM8AF6248TCX support in-system programming via SWIM?
Yes, the device features a Single-Wire Interface Module (SWIM) accessible through PE0 (SWIM) and PE1 (RST) pins, enabling full in-circuit programming, debugging, and memory read/write operations without requiring a dedicated debug header or JTAG interface.
How many LIN nodes can STM8AF6248TCX manage as a master?
The integrated LINUART supports master mode with automatic resynchronization and frame checksum generation, allowing control of up to 16 slave nodes on a single LIN bus - consistent with LIN 2.2 specification limits and verified in ST's AN4933 application note.
Is the 1 Kbyte data EEPROM organized as separate physical memory or emulated in Flash?
It is true, dedicated data EEPROM memory - not Flash-emulated - with independent write/erase cycles, 300 kcycle endurance, and guaranteed data retention of 20 years at 55 °C, as specified in Section 5.4.2 of the production datasheet DocID14952 Rev 11.
STM8AF6248TCX 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6248TCX FAQ
1.How can I place an order for STM8AF6248TCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6248TCX 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 STM8AF6248TCX reliable?
The price and inventory of STM8AF6248TCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6248TCX is usually 5 days.
3.What payment methods are accepted for STM8AF6248TCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6248TCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6248TCX?
STM8AF6248TCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6248TCX 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 STM8AF6248TCX?
For technical support, including STM8AF6248TCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6248TCX requirements.
6.How does Aetrix verify that STM8AF6248TCX is sourced from the original manufacturer or authorized distributors?
All STM8AF6248TCX 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 STM8AF6248TCX meets industry standards.
7.What is the process for return or replacement of STM8AF6248TCX?
All STM8AF6248TCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6248TCX, 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 STM8AF6248TCX part is unused and in its original packaging.
Return procedure for STM8AF6248TCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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