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STMicroelectronics STM8AF6248TCY
- Part No.:
- STM8AF6248TCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AF6248TCY.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,341
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Product details
Overview
STM8AF6248TCY 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 LINUART, SPI, I²C, 10-bit ADC, and advanced timers. It operates from 3 to 5.5 V and supports ambient temperatures up to 150 °C, targeting engine control units and body electronics modules.
For engineers reviewing the STM8AF6248TCY datasheet, STM8AF6248TCY pinout, STM8AF6248TCY application, or STM8AF6248TCY equivalent, key selection criteria include automotive-grade reliability (AEC-Q100 Rev G), LIN 2.2 compliance with automatic resynchronization, 10-bit ADC with 2 LSB TUE accuracy, and VFQFPN32 (5×5 mm) package compatibility with high-temperature PCB layouts.
Technical Context
The STM8AF6248TCY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, delivering 10 MIPS at 16 MHz. Its clock system integrates user-trimmable 16 MHz HSI and low-power 128 kHz LSI oscillators, plus external crystal support and clock security monitoring.
Peripheral integration includes a LINUART supporting master/slave modes with hardware resync, two 16-bit general-purpose PWM timers (up to 3 CAPCOM channels each), one advanced control timer with dead-time insertion and complementary outputs, and a 10-bit ADC with up to 10 multiplexed channels, individual data buffers, and analog watchdog capability.
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 functions. |
| Max fCPU | 16 MHz at 3–5.5 V supply; supports deterministic timing in engine management and transmission control loops. |
| 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, odometer values, and fault logs without external NV memory. |
| ADC Resolution & Accuracy | 10-bit SAR ADC with 2 LSB total unadjusted error (TUE); meets precision requirements for sensor signal conditioning in throttle position or coolant temperature sensing. |
| LIN Interface | LIN 2.2-compliant UART with automatic resynchronization; eliminates need for external LIN transceiver in cost-sensitive body control modules. |
| Operating Temperature | −40 to +150 °C ambient; validated for under-hood placement in powertrain and chassis applications per AEC-Q100 Grade 0. |
Pinout & Package
STM8AF6248TCY is housed in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) thermally enhanced, lead-free package optimized for high-temperature automotive PCBs. The package features exposed thermal pad for improved heat dissipation in compact engine bay designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3–5.5 V supply rail; requires local 100 nF ceramic decoupling adjacent to pin for stable core and peripheral operation. |
| VSS | Ground reference | Digital ground return; must be connected to low-impedance PCB plane to minimize noise coupling into ADC and LIN circuits. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external RC network for customizable power-on reset timing per ISO 16750-2. |
| 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. |
| PC0–PC7 | General-purpose I/O port C | 8-bit port with LINUART TX/RX remapping; enables flexible board layout while maintaining LIN physical layer integrity. |
| PD0–PD7 | General-purpose I/O port D | Includes TIM3/4 channels and I²C SCL/SDA; supports fast-mode (400 kbit/s) I²C communication with slew-rate control. |
| PE0–PE7 | General-purpose I/O port E | Features ADC_IN0–ADC_IN7 inputs and SPI NSS; allows full 10-channel ADC sampling without external multiplexer. |
| VCAP | Internal voltage regulator capacitor connection | Requires 2.2 µF X7R ceramic capacitor to stabilize internal 1.8 V core supply; critical for EMC robustness and clock stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 to +150 °C operation with extended lifetime testing; eliminates requalification effort for under-hood ECUs. |
| Integrated LIN 2.2 interface | Hardware resynchronization and frame checksum generation reduce CPU overhead by >40% vs software-based LIN stacks. |
| True data EEPROM | 1 Kbyte on-chip EEPROM with 300 kcycle endurance enables direct storage of wear-sensitive parameters (e.g., brake pad wear counters). |
| Advanced control timer (TIM1) | 16-bit timer with 3 complementary outputs and programmable dead-time insertion; supports 3-phase motor gate drive without external logic. |
| Low-power modes with clock gating | Wait/Halt/Auto-wakeup modes with per-peripheral clock enable/disable control; achieves <1.5 µA standby current with RTC active. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and coolant temperature in gasoline direct injection systems. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop fuel injection and spark timing algorithms with sub-10 µs interrupt latency. Use Value: 16 MHz deterministic execution and 10-bit ADC with scan mode enable precise sensor fusion at 10 kHz sampling rate. |
Use Scenario: Centralized control of door locks, window lifts, interior lighting, and LIN-connected mirror modules. IC Role / Device Role / Timing Role: LIN master coordinating up to 16 slave nodes while managing local PWM dimming and wake-on-LIN events. Use Value: Integrated LINUART with auto-resync ensures reliable communication across vehicle harnesses with ±15% clock tolerance. |
| Transmission Control Unit (TCU) | Heating/Ventilation/AC (HVAC) Controller |
Use Scenario: Gear shift logic, solenoid driver timing, and CAN/LIN gateway functionality in 6-speed automatic transmissions. IC Role / Device Role / Timing Role: Safety-relevant controller interfacing with CAN bus for gear command arbitration and LIN for valve actuator feedback. Use Value: Dual 16-bit PWM timers with complementary outputs drive high-side/low-side solenoid drivers with configurable dead time. |
Use Scenario: Blower motor speed regulation, blend door actuation, and cabin temperature feedback using NTC sensors and PWM fans. IC Role / Device Role / Timing Role: Sensor hub aggregating analog HVAC sensor data and driving 3-phase brushless blower motors via TIM1. Use Value: 1 Kbyte EEPROM stores factory calibration offsets for NTC sensors, eliminating post-assembly trimming steps. |
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 |
|---|---|---|---|
| STM8AF6268TCY | Same package and pinout; adds 2 Kbyte RAM (vs. 2 Kbyte in STM8AF6248TCY) and second I²C interface. | Required when dual I²C buses needed for separate sensor and display interfaces in instrument clusters. | Select if additional RAM or dual I²C is mandatory; otherwise STM8AF6248TCY offers optimal BOM cost for single-bus BCMs. |
| RL78/F13-GB | Renesas RL78 core; 24 MHz max, 32 Kbyte Flash, but only 512 byte data flash (no true EEPROM) and no LIN hardware support. | Suitable for non-LIN applications where CAN-only communication suffices and EEPROM emulation is acceptable. | Choose only if migrating from Renesas ecosystem; lacks LIN 2.2 hardware acceleration and AEC-Q100 Grade 0 validation at 150 °C. |
Compared with STM8AF6268TCY, the STM8AF6248TCY reduces cost and complexity for LIN-centric body electronics, while the RL78/F13-GB requires software LIN stack development and lacks guaranteed 150 °C operation-making STM8AF6248TCY the preferred choice for thermally demanding, LIN-dependent automotive modules.
Availability
STM8AF6248TCY is available at Aetrix Electronics and suitable for engine control units, body control modules, transmission control units, and HVAC controllers requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6248TCY 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 ICs, sensors, and automotive-grade silicon for industrial and transportation markets.
The STM8A automotive MCU product line targets cost-sensitive, high-reliability applications in powertrain, chassis, and body electronics, emphasizing AEC-Q100 compliance, extended temperature operation, and integrated LIN/CAN peripherals.
FAQ
What is the maximum operating junction temperature for STM8AF6248TCY?
The STM8AF6248TCY is rated for ambient temperatures from −40 to +150 °C and has a maximum junction temperature of +175 °C per AEC-Q100 stress test conditions. Thermal design must ensure θJA ≤ 45 °C/W when mounted on a 4-layer PCB with 2 oz copper and thermal vias under the exposed pad.
Does STM8AF6248TCY support in-circuit debugging via SWIM?
Yes, STM8AF6248TCY includes the Single Wire Interface Module (SWIM) for non-intrusive in-circuit debugging and programming using ST-LINK/V2 or compatible debuggers. SWIM uses the NRST pin and requires no dedicated debug pins, preserving all I/O for application use.
How is LIN bus synchronization handled in hardware?
The integrated LINUART performs automatic resynchronization on each header byte using internal baud rate measurement, compensating for ±15% oscillator tolerance between master and slave nodes. This eliminates software-based sync pulse detection and reduces CPU load during LIN frame transmission.
Can the 10-bit ADC operate in continuous scan mode with DMA?
No-STM8AF6248TCY's ADC does not support DMA. However, it provides individual data buffers per channel and scan mode with interrupt-on-conversion-complete, enabling efficient polling or interrupt-driven acquisition of up to 10 channels at rates up to 1 MSPS with minimal CPU intervention.
STM8AF6248TCY 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6248TCY FAQ
1.How can I place an order for STM8AF6248TCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6248TCY 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 STM8AF6248TCY reliable?
The price and inventory of STM8AF6248TCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6248TCY is usually 5 days.
3.What payment methods are accepted for STM8AF6248TCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6248TCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6248TCY?
STM8AF6248TCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6248TCY 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 STM8AF6248TCY?
For technical support, including STM8AF6248TCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6248TCY requirements.
6.How does Aetrix verify that STM8AF6248TCY is sourced from the original manufacturer or authorized distributors?
All STM8AF6248TCY 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 STM8AF6248TCY meets industry standards.
7.What is the process for return or replacement of STM8AF6248TCY?
All STM8AF6248TCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6248TCY, 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 STM8AF6248TCY part is unused and in its original packaging.
Return procedure for STM8AF6248TCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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