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STMicroelectronics STM8AF6246TCSSSY
- Part No.:
- STM8AF6246TCSSSY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6246TCSSSY.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:990
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Product details
Overview
STM8AF6246TCSSSY from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 16 KB Flash, 1 KB data EEPROM, 2 KB RAM, 10-bit ADC with 10 channels, LINUART, SPI, I²C, and advanced timers - deployed in engine control units, body electronics, and LIN bus nodes requiring operation up to 150 °C.
For engineers reviewing the STM8AF6246TCSSSY datasheet, STM8AF6246TCSSSY pinout, STM8AF6246TCSSSY application, or STM8AF6246TCSSSY equivalent, key selection criteria include AEC-Q100 Grade 0 qualification, VFQFPN32 (5×5 mm) package compatibility, LIN 2.2 compliance, 10-bit ADC linearity (2 LSB TUE), and 16 MHz fCPU at 3–5.5 V supply.
Technical Context
The STM8AF6246TCSSSY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction, delivering 10 MIPS at 16 MHz. It integrates dual RC oscillators (16 MHz HSI trimmable ±1%, 128 kHz LSI), clock security system (CSS), and nested interrupt controller supporting 32 vectors and up to 34 external interrupts across 5 priority levels.
Its analog subsystem includes a 10-bit ADC with scan mode, individual channel buffers, analog watchdog, and configurable sampling timing. Communication peripherals comprise LINUART (master/slave, auto-resync), SPI (up to 8 Mbit/s), and I²C (up to 400 Kbit/s), all independently clock-gated via CLK_PCKENR registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic real-time response for safety-critical automotive tasks. |
| Max Clock Frequency | 16 MHz fCPU; supports 10 MIPS performance at full speed with 3–5.5 V supply and TA = −40 to +150 °C. |
| Flash Memory | 16 KB program Flash; retains data ≥20 years at 55 °C after 1,000 write/erase cycles - suitable for firmware-in-field updates. |
| Data EEPROM | 1 KB true data EEPROM; rated for 300,000 write/erase cycles - used for calibration storage and configuration persistence. |
| ADC Resolution & Accuracy | 10-bit SAR ADC with 2 LSB total unadjusted error (TUE) and 2 LSB integral nonlinearity - meets precision sensor interface requirements. |
| LIN Compliance | LIN 2.2 compliant UART with automatic resynchronization and master/slave mode - eliminates need for external LIN transceiver in basic nodes. |
| Operating Temperature | −40 °C to +150 °C ambient; qualified per AEC-Q100 Rev G Grade 0 - validated for under-hood engine management applications. |
| Supply Voltage Range | 3.0 V to 5.5 V; supports direct connection to automotive battery rails with transient tolerance and brown-out reset. |
Pinout & Package
STM8AF6246TCSSSY is housed in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) thermally enhanced package with exposed thermal pad, optimized for high-reliability automotive PCB layouts and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure low-impedance power delivery and noise immunity in noisy automotive environments. |
| NRST | Active-low reset input | Internal pull-up; accepts Schmitt-triggered signal; supports external reset supervision and safe power-on initialization. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O ports | Up to 38 user pins including 10 high-speed (HS) I/Os; robust against current injection per ISO 10605. |
| OSC_IN / OSC_OUT | Crystal oscillator interface | Supports 1–24 MHz external crystal or ceramic resonator; integrated load capacitors reduce BOM count. |
| SWIM | Single-wire interface module | Asynchronous debug and programming interface using single pin; enables in-system programming without JTAG overhead. |
| LIN_TX / LIN_RX | LIN bus physical layer interface | Dedicated LINUART pins; support direct connection to LIN transceiver or internal LIN driver (with external pull-up). |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Control Timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, dead-time insertion - enables 3-phase motor control without external gate drivers. |
| Low-power Modes | Wait, Auto-wakeup, Halt, and Active-halt modes with selective clock gating - reduces current to <1 µA in Halt mode with RTC active. |
| Memory Protection | Read-out protection (ROP), write protection (WP), and user boot code (UBC) lock - prevents unauthorized firmware extraction or overwrite. |
| Analog Watchdog | Configurable threshold monitoring on any ADC channel - triggers interrupt or reset on out-of-range sensor readings for fail-safe response. |
| EMC Performance | Qualified per ISO 11452-2 (radiated immunity), ISO 11452-4 (BCI), and ISO 7637-2 (transient burst) - meets OEM ECU-level EMC requirements. |
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 engine management systems. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop fuel injection and ignition timing algorithms with sub-microsecond interrupt latency. Use Value: 16 MHz deterministic execution, 10-bit ADC with analog watchdog, and 150 °C operation enable reliable control under hood thermal stress. |
Use Scenario: Centralized control of door locks, window lifts, lighting, and HVAC actuators in passenger compartment electronics. IC Role / Device Role / Timing Role: LIN master node coordinating slave modules (e.g., mirror controls, seat position sensors) via LIN 2.2 bus. Use Value: Integrated LINUART with auto-resync eliminates external transceiver cost and simplifies PCB layout for distributed body networks. |
| Climate Control Panel | Seat Occupancy Detection System |
Use Scenario: Human-machine interface for HVAC control with rotary encoder input, LED backlighting, and temperature sensor feedback. IC Role / Device Role / Timing Role: Sensor fusion MCU aggregating thermistor, humidity, and IR proximity data while driving segmented LCD and PWM fans. Use Value: 1 KB data EEPROM stores user preferences and calibration offsets; HS I/Os drive multiplexed LED segments with precise current control. |
Use Scenario: Capacitive or pressure-based occupant detection in front passenger seat for airbag deployment logic. IC Role / Device Role / Timing Role: Signal conditioning and threshold evaluation unit interfacing with analog sensor arrays and communicating status over LIN to airbag ECU. Use Value: 10-channel 10-bit ADC with scan mode captures multi-point sensor data simultaneously; analog watchdog ensures continuous fault detection. |
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 |
|---|---|---|---|
| STM8AF6266TCY | 32 KB Flash, 2 KB RAM, same VFQFPN32 package and peripheral set; higher memory density. | Suitable for applications requiring larger bootloader or OTA update partition. | Select when firmware size exceeds 16 KB or future scalability is required without PCB redesign. |
| RL78/F13-BS | Renesas RL78 core, 24 MHz max, 32 KB Flash, 2.7–5.5 V, AEC-Q100 Grade 1 (−40 to +125 °C). | Limited to 125 °C ambient; lacks native LIN 2.2 UART - requires external transceiver and software stack. | Choose only if existing RL78 toolchain integration outweighs thermal and LIN implementation overhead. |
Compared with STM8AF6246TCSSSY, STM8AF6266TCY offers memory headroom within identical footprint and qualification, while RL78/F13-BS trades thermal capability and integrated LIN for ecosystem alignment - making STM8AF6246TCSSSY optimal for cost-sensitive, high-temp LIN edge nodes.
Availability
STM8AF6246TCSSSY is available at Aetrix Electronics and suitable for engine control units, body control modules, and climate control panels requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6246TCSSSY 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 analog devices for automotive, industrial, and consumer markets.
The STM8A automotive MCU product line targets cost-optimized, AEC-Q100-compliant control applications in harsh environments - emphasizing functional safety readiness, thermal resilience, and LIN/CAN-ready communication integration.
FAQ
What is the maximum operating temperature rating for STM8AF6246TCSSSY?
The STM8AF6246TCSSSY is qualified per AEC-Q100 Rev G Grade 0 with guaranteed operation from −40 °C to +150 °C ambient temperature. This rating is validated through accelerated life testing and thermal cycling per JEDEC standards, enabling use in under-hood engine management and transmission control modules where junction temperatures exceed 125 °C.
Does STM8AF6246TCSSSY support in-circuit debugging without additional hardware?
Yes - STM8AF6246TCSSSY features a Single-Wire Interface Module (SWIM) that enables full in-circuit debugging and programming using only one dedicated pin (SWIM). No JTAG adapter or external debugger is required; ST-LINK/V2 or compatible tools provide flash erase, breakpoint, and register inspection capabilities directly over SWIM at up to 2.66 Mbps.
How many LIN nodes can STM8AF6246TCSSSY manage as a master device?
STM8AF6246TCSSSY supports one LIN bus master instance via its integrated LINUART peripheral. It can communicate with up to 16 slave nodes on a single LIN network using standard LIN 2.2 frame scheduling and identifier management. Multiple buses require external transceivers and software-managed time-division multiplexing.
Is the 1 KB data EEPROM truly wear-leveled and accessible during program execution?
Yes - the 1 KB data EEPROM is implemented as a separate memory block with independent erase/write circuitry. It supports byte- and word-level writes, concurrent read-while-write operation, and is rated for 300,000 endurance cycles. Access occurs via dedicated EEPROM control registers (FLASH_IAPSR, FLASH_DUKR) without stalling the CPU.
STM8AF6246TCSSSY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-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:
- 25
- 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 7x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6246TCSSSY FAQ
1.How can I place an order for STM8AF6246TCSSSY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6246TCSSSY 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 STM8AF6246TCSSSY reliable?
The price and inventory of STM8AF6246TCSSSY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6246TCSSSY is usually 5 days.
3.What payment methods are accepted for STM8AF6246TCSSSY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6246TCSSSY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6246TCSSSY?
STM8AF6246TCSSSY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6246TCSSSY 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 STM8AF6246TCSSSY?
For technical support, including STM8AF6246TCSSSY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6246TCSSSY requirements.
6.How does Aetrix verify that STM8AF6246TCSSSY is sourced from the original manufacturer or authorized distributors?
All STM8AF6246TCSSSY 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 STM8AF6246TCSSSY meets industry standards.
7.What is the process for return or replacement of STM8AF6246TCSSSY?
All STM8AF6246TCSSSY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6246TCSSSY, 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 STM8AF6246TCSSSY part is unused and in its original packaging.
Return procedure for STM8AF6246TCSSSY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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