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STMicroelectronics STM8AF62A8TDX
- Part No.:
- STM8AF62A8TDX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AF62A8TDX.pdf
- Description:
- IC MCU 8BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,759
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Product details
Overview
STM8AF62A8TDX from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit microcontroller featuring a 24 MHz STM8A core, 128 Kbyte Flash program memory with 20-year data retention at 55 °C, 2 Kbyte true data EEPROM (300 kcycle endurance), and integrated CAN 2.0B interface operating up to 1 Mbit/s. It supports LIN 2.2-compliant communication, 10-bit ADC with 16 multiplexed channels, and operates across -40 °C to 150 °C for engine control unit (ECU) and body electronics applications.
For engineers reviewing the STM8AF62A8TDX datasheet, STM8AF62A8TDX pinout, STM8AF62A8TDX application, or STM8AF62A8TDX equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and I/O specifications, and real-world substitution guidance for ECU redesigns and functional safety-critical subsystems.
Technical Context
The STM8AF62A8TDX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, enabling 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 up to 24 MHz with clock security monitoring.
Peripheral integration includes a dedicated beCAN controller compliant with ISO 11898-1, LINUART supporting master/slave modes with automatic resynchronization, and dual 16-bit general-purpose timers with CAPCOM channels-each supporting input capture, output compare, and PWM generation for motor control feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic interrupt latency and efficient code density for real-time ECU tasks. |
| Max fCPU | 24 MHz; sustains full peripheral operation including CAN, ADC, and timers without throttling in extended temperature range. |
| Flash Memory | 128 Kbyte; supports over-the-air firmware updates and bootloader partitioning with write protection and read-out protection (ROP) options. |
| Data EEPROM | 2 Kbyte true EEPROM; retains calibration data and fault logs for 20 years at 55 °C, eliminating need for external nonvolatile storage. |
| CAN Interface | CAN 2.0B compliant, 1 Mbit/s; includes message filtering, FIFO buffering, and error confinement for robust vehicle network node implementation. |
| ADC Resolution | 10-bit with ±2 LSB total unadjusted error (TUE); supports 16-channel multiplexing for sensor monitoring in battery management and thermal sensing. |
| Operating Temperature | -40 °C to +150 °C; qualified per AEC-Q100 Grade 0, enabling direct placement in high-heat zones like transmission control modules. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced heat dissipation in under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply (digital) | 3.0–5.5 V main supply; decoupled via external 100 nF capacitor near pin for stable core voltage during CAN bus arbitration transients. |
| VSS | Digital ground | Reference return path for all digital I/O and core logic; must be connected to low-impedance ground plane to suppress EMI in high-speed CAN signaling. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.2–5.5 V logic levels and supports external watchdog reset injection. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with high-sink capability (20 mA); configurable as analog inputs, timer channels, or LIN/CAN alternate functions. |
| PB0–PB7 | General-purpose I/O port B | 8-bit port supporting SPI SCK/MOSI/MISO, USART TX/RX, and CAN RX/TX on PB4/PB5; includes Schmitt-trigger inputs for noise immunity. |
| PC0–PC7 | General-purpose I/O port C | Includes TIM1/2/3 channel pins and ADC IN0–IN7; supports remappable alternate functions for flexible PCB routing in space-constrained ECUs. |
| PD0–PD7 | General-purpose I/O port D | Supports I2C SCL/SDA, LINUART TX/RX, and auto-wakeup timer input; features glitch-free transition on wake-from-halt. |
| PE0–PE7 | General-purpose I/O port E | Provides additional ADC inputs, timer channels, and SWIM debug interface; PE0/PE1 serve as SWIM clock/data for in-circuit programming. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for continuous operation at 150 °C junction temperature, meeting automotive powertrain reliability requirements without derating. |
| Integrated CAN 2.0B controller | Hardware message filtering, 32-message object RAM, and automatic retransmission reduce CPU load by >40% versus software-based CAN stacks. |
| True data EEPROM | 2 Kbyte embedded EEPROM with 300 kcycle endurance eliminates external serial EEPROM, reducing BOM count and board area in compact ECUs. |
| Low-power modes with clock gating | Wait/Halt/Active-halt modes achieve <1.5 µA current in Halt with RTC active, extending battery life in always-on vehicle modules. |
| LIN 2.2-compliant UART | Automatic baud rate detection and resynchronization enable plug-and-play interoperability with legacy LIN slaves without host controller intervention. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Real-time fuel injection timing, spark advance calculation, and knock detection using analog sensor inputs and PWM-driven actuators. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop control algorithms with sub-100 µs interrupt latency for crankshaft position decoding and injector firing. Use Value: 10-bit ADC with hardware oversampling and 16-channel mux enables simultaneous monitoring of O2, MAP, coolant, and intake air temperature sensors without external multiplexers. |
Use Scenario: Gear selection logic, clutch pressure modulation, and CAN-based communication with engine and brake control units. IC Role / Device Role / Timing Role: CAN network node managing priority-based message scheduling and fault-tolerant state machine execution for shift solenoid drivers. Use Value: Integrated beCAN controller with 32-message object RAM and hardware filtering offloads 90% of CAN protocol handling from CPU, freeing cycles for PID torque control. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Centralized control of lighting, door locks, window lifters, and HVAC fan speed using PWM and LIN slave coordination. IC Role / Device Role / Timing Role: Master node on LIN subnetwork managing up to 16 slave devices while maintaining synchronous communication with main CAN backbone. Use Value: LINUART with automatic resynchronization tolerates ±15% oscillator drift across temperature, ensuring reliable communication with low-cost LIN transceivers. |
Use Scenario: Torque assist computation, motor phase current sensing, and fail-safe shutdown based on torque sensor, motor encoder, and temperature feedback. IC Role / Device Role / Timing Role: Safety-critical controller implementing ASIL-B decomposition with dual independent ADC sampling paths and redundant timer-based watchdog supervision. Use Value: 16-bit advanced control timer with dead-time insertion and complementary outputs directly drives 3-phase gate drivers without external logic, reducing component count and layout 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 |
|---|---|---|---|
| STM8AF62A6TDX | 64 Kbyte Flash, 1 Kbyte EEPROM; identical pinout and peripheral set except reduced memory capacity. | Suitable for simpler BCM or sensor nodes where firmware size and data logging depth are constrained. | Select when application firmware fits within 64 Kbyte and EEPROM usage remains below 1 Kbyte to reduce cost without sacrificing footprint or toolchain compatibility. |
| STM32F042F6P6 | 32-bit ARM Cortex-M0 core, 32 Kbyte Flash, no native CAN; requires external CAN transceiver and lacks AEC-Q100 Grade 0 rating. | Applicable only in non-safety-critical, lower-temperature body electronics where 32-bit processing and USB are prioritized over CAN integration. | Choose only if migrating to ARM ecosystem and accepting higher BOM cost, external CAN PHY, and limited temperature range (–40 °C to 105 °C). |
Compared with STM8AF62A6TDX, the STM8AF62A8TDX provides double Flash and EEPROM capacity for complex ECU firmware and extended diagnostic data logging; versus STM32F042F6P6, it delivers native CAN, AEC-Q100 Grade 0 qualification, and proven 8-bit deterministic timing essential for powertrain applications.
Availability
STM8AF62A8TDX is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and electric power steering systems requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF62A8TDX 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 and ISO/TS 16949-certified processes.
The STM8AF series is designed specifically for automotive powertrain and chassis applications, emphasizing AEC-Q100 compliance, extended temperature operation, and integrated CAN/LIN interfaces to replace discrete communication solutions in cost-sensitive ECUs.
FAQ
What is the maximum ambient temperature rating for STM8AF62A8TDX in continuous operation?
The device is qualified per AEC-Q100 Grade 0 for continuous operation from –40 °C to +150 °C ambient temperature. This rating applies to the full specified electrical performance envelope, including CAN communication at 1 Mbit/s and ADC conversions, with junction temperature maintained ≤150 °C via appropriate PCB thermal design and airflow.
Does STM8AF62A8TDX support in-circuit debugging without external hardware?
Yes-it features a Single Wire Interface Module (SWIM) accessible via pins PE0 (SWIMCLK) and PE1 (SWIMD), enabling full-speed debugging, flash programming, and real-time variable inspection using ST-LINK/V2 or compatible debug probes without JTAG header or additional circuitry.
How does the integrated CAN controller handle bus errors and fault confinement?
The beCAN module implements ISO 11898-1-compliant error detection, including bit, stuffing, CRC, form, and acknowledgment error counters. When error counters exceed limits, it automatically enters Bus-Off state and supports automatic or software-triggered recovery, isolating faults without disrupting other network nodes.
Can the 2 Kbyte data EEPROM be used for secure key storage in automotive security applications?
No-the embedded EEPROM lacks hardware cryptographic acceleration or tamper-resistant memory protection. While it supports ROP (Read-Out Protection) Level 1/2 to prevent unauthorized firmware extraction, secure key storage requires external secure elements or dedicated automotive security MCUs such as ST's SPC58x series.
STM8AF62A8TDX 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:
- 24MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 6K 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:
STM8AF62A8TDX FAQ
1.How can I place an order for STM8AF62A8TDX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF62A8TDX 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 STM8AF62A8TDX reliable?
The price and inventory of STM8AF62A8TDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF62A8TDX is usually 5 days.
3.What payment methods are accepted for STM8AF62A8TDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF62A8TDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF62A8TDX?
STM8AF62A8TDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF62A8TDX 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 STM8AF62A8TDX?
For technical support, including STM8AF62A8TDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF62A8TDX requirements.
6.How does Aetrix verify that STM8AF62A8TDX is sourced from the original manufacturer or authorized distributors?
All STM8AF62A8TDX 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 STM8AF62A8TDX meets industry standards.
7.What is the process for return or replacement of STM8AF62A8TDX?
All STM8AF62A8TDX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF62A8TDX, 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 STM8AF62A8TDX part is unused and in its original packaging.
Return procedure for STM8AF62A8TDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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