My Inquiry
My Account
STMicroelectronics STM8AF6246TDSSSY
- Part No.:
- STM8AF6246TDSSSY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6246TDSSSY.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,523
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM8AF6246TDSSSY from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 16 KB Flash, 1 KB data EEPROM, 10-bit ADC with 10 channels, LINUART, SPI, I²C, and operation up to 150 °C in VFQFPN32 (5×5 mm) package. It serves as main control unit in engine management subsystems requiring robust LIN communication and high-temperature reliability.
For engineers reviewing the STM8AF6246TDSSSY datasheet, STM8AF6246TDSSSY pinout, STM8AF6246TDSSSY application, or STM8AF6246TDSSSY equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and interface specifications, and real-world use-case mapping for powertrain and body electronics design.
Technical Context
The STM8AF6246TDSSSY implements a Harvard-architecture STM8A CPU with 3-stage pipeline, achieving 10 MIPS at 16 MHz via 1.6 cycles/instruction average. Its clock system integrates user-trimmable 16 MHz HSI RC, 128 kHz LSI RC, and external crystal oscillator with clock security monitoring.
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 channel buffers - all qualified for automotive ambient conditions up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time control in safety-critical engine ECU tasks. |
| Max Clock Frequency | 16 MHz fCPU; supports 10 MIPS throughput for LIN protocol stack execution and sensor sampling within tight timing budgets. |
| Flash Memory | 16 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; sufficient for dual-bank firmware updates in ASIL-B systems. |
| Data EEPROM | 1 Kbyte true data EEPROM with 300 kcycle endurance; stores calibration parameters and fault logs without external NV memory. |
| ADC Resolution & Channels | 10-bit ADC with ±2 LSB total unadjusted error and up to 10 multiplexed inputs; meets precision requirements for throttle position and coolant temperature sensing. |
| Operating Temperature | −40 °C to +150 °C ambient; certified for under-hood deployment in gasoline/diesel powertrain modules per AEC-Q100 Grade 0. |
| Communication Interfaces | LINUART (LIN 2.2 compliant), SPI (up to 8 Mbit/s), I²C (up to 400 Kbit/s); enables hierarchical vehicle network integration with sensors and actuators. |
Pinout & Package
VFQFPN32 (5×5 mm, 0.5 mm pitch) thermally enhanced package with exposed thermal pad; optimized for compact automotive PCB layouts and high-reliability solder joint integrity under thermal cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 3–5.5 V supply rails with dedicated decoupling pins; supports stable operation during load dump transients per ISO 7637-2. |
| NRST | Active-low reset input | Internally pulled up; accepts 1.2 V logic threshold and withstands −0.3 to 6.0 V; enables robust reset assertion during battery brownout. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O ports | Up to 38 user pins including 10 high-speed I/Os; immune to current injection per AEC-Q100; configurable pull-up/down and alternate functions. |
| OSC_IN / OSC_OUT | Crystal oscillator terminals | Supports 1–16 MHz external crystal; integrated load capacitors reduce BOM count; essential for LIN baud rate accuracy and clock redundancy. |
| SWIM | Single-wire interface module | On-chip debug interface using single pin; enables in-system programming and real-time debugging without halting CPU operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation; eliminates need for external thermal derating in engine control units. |
| Embedded LIN 2.2 UART | Hardware-accelerated master/slave mode with automatic resynchronization; reduces CPU load by >40% vs software-based LIN stacks. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, dead-time insertion; enables precise 3-phase motor gate drive in HVAC blowers. |
| True data EEPROM | 1 Kbyte on-chip nonvolatile memory with 300 kcycle endurance; replaces external serial EEPROM, reducing board area and failure points. |
| Low-power modes (Wait/Halt) | User-definable clock gating with auto-wakeup timer; achieves <1.5 µA halt current at 25 °C, extending battery life in always-on modules. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Real-time processing of crankshaft position, camshaft timing, and oxygen sensor signals in gasoline direct injection systems. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop fuel injection and spark timing algorithms with sub-millisecond interrupt latency. Use Value: 16 MHz deterministic execution and 10-bit ADC with analog watchdog ensure compliance with OBD-II diagnostic response time and sensor fault detection requirements. |
Use Scenario: Gear selection logic and solenoid driver coordination in 6-speed automatic transmissions. IC Role / Device Role / Timing Role: Central controller managing CAN/LIN gateway functions, PWM valve actuation, and thermal monitoring of hydraulic fluid. Use Value: Integrated advanced timer with dead-time insertion prevents shoot-through in high-side/low-side solenoid drivers, meeting ISO 26262 ASIL-B functional safety constraints. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Centralized management of door locks, window lifters, and interior lighting with LIN-connected slave nodes. IC Role / Device Role / Timing Role: LIN master node coordinating up to 16 slave devices while maintaining 19.2 kbps baud rate accuracy across temperature. Use Value: Hardware LINUART with automatic resynchronization maintains communication integrity during voltage dips and EMI events in 12 V vehicle networks. |
Use Scenario: Torque assist calculation and motor phase current regulation in brushless DC steering motors. IC Role / Device Role / Timing Role: Safety-monitoring MCU interfacing with torque sensor, motor encoder, and ASIL-D host controller via SPI. Use Value: 150 °C operating range and robust I/O design allow direct mounting on EPS motor housing, eliminating remote mounting and harness complexity. |
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 |
|---|---|---|---|
| STM8AF6266TDSSSY | 32 KB Flash, 2 KB RAM, same peripherals and package; higher memory for complex diagnostics and OTA update buffers. | Required where full OBD-II PID support and flash-based bootloader co-residency are needed. | Select when firmware size exceeds 16 KB or dual-bank update architecture is mandated. |
| RL78/F13-CD-TPFB | Renesas RL78 core, 24 MHz max, 128 KB Flash, 10 KB RAM; different instruction set and toolchain; no native LIN hardware. | Suitable for new designs prioritizing longer-term roadmap continuity over legacy LIN integration. | Choose only if migrating from Renesas ecosystem; requires LIN implemented in software with higher CPU overhead. |
Compared with STM8AF6246TDSSSY, STM8AF6266TDSSSY offers scalable memory for future feature expansion while retaining identical pinout and qualification; RL78/F13-CD-TPFB provides larger memory headroom but lacks hardware LIN acceleration and AEC-Q100 Grade 0 thermal rating.
Availability
STM8AF6246TDSSSY is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and body control modules requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF6246TDSSSY 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 ICs with vertical manufacturing capabilities.
This device belongs to the STM8A automotive microcontroller family, designed specifically for cost-sensitive, high-reliability engine and chassis control applications demanding AEC-Q100 Grade 0 operation and integrated LIN connectivity.
FAQ
What is the maximum junction temperature specification for STM8AF6246TDSSSY?
The device 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 test requirements and confirmed in Section 10.3 of the official datasheet (DocID14952 Rev 11, p.52).
Does STM8AF6246TDSSSY support hardware-based LIN bus communication?
Yes - it integrates a dedicated LINUART peripheral compliant with LIN 2.2 specification, supporting both master and slave modes with automatic resynchronization and configurable baud rates. This hardware block offloads protocol handling from the CPU, enabling reliable communication without software timing dependencies.
What is the endurance specification for the on-chip data EEPROM?
The embedded data EEPROM is rated for 300,000 write/erase cycles and guarantees 20 years of data retention at 55 °C after 1,000 cycles. These values are measured per JEDEC JESD22-A117 and documented in Table 32 (p.62) and Section 5.4 of the datasheet.
Can STM8AF6246TDSSSY operate from a 3.3 V supply rail?
No - the absolute minimum supply voltage is 3.0 V, but the device requires 3.3 V to 5.5 V for guaranteed operation across its full temperature and frequency range. At 3.3 V, maximum fCPU is limited to 8 MHz (see Figure 8, p.52); full 16 MHz operation requires ≥4.5 V per electrical characteristics tables.
STM8AF6246TDSSSY 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 ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6246TDSSSY FAQ
1.How can I place an order for STM8AF6246TDSSSY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6246TDSSSY 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 STM8AF6246TDSSSY reliable?
The price and inventory of STM8AF6246TDSSSY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6246TDSSSY is usually 5 days.
3.What payment methods are accepted for STM8AF6246TDSSSY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6246TDSSSY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6246TDSSSY?
STM8AF6246TDSSSY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6246TDSSSY 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 STM8AF6246TDSSSY?
For technical support, including STM8AF6246TDSSSY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6246TDSSSY requirements.
6.How does Aetrix verify that STM8AF6246TDSSSY is sourced from the original manufacturer or authorized distributors?
All STM8AF6246TDSSSY 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 STM8AF6246TDSSSY meets industry standards.
7.What is the process for return or replacement of STM8AF6246TDSSSY?
All STM8AF6246TDSSSY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6246TDSSSY, 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 STM8AF6246TDSSSY part is unused and in its original packaging.
Return procedure for STM8AF6246TDSSSY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8AF6246TDSSSY Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
