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STMicroelectronics STM8AF62A8TDY
- Part No.:
- STM8AF62A8TDY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AF62A8TDY.pdf
- Description:
- IC MCU 8BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,270
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Product details
Overview
STM8AF62A8TDY 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 - deployed in engine control units for real-time sensor signal acquisition and actuator command execution.
For engineers reviewing the STM8AF62A8TDY datasheet, STM8AF62A8TDY pinout, STM8AF62A8TDY application, or STM8AF62A8TDY equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and power specifications, and confirmed drop-in alternatives for ECU, body control, and LIN/CAN gateway designs.
Technical Context
The STM8AF62A8TDY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, achieving 10 MIPS at 16 MHz. It integrates dual clock sources: user-trimmable 16 MHz RC oscillator and low-power 128 kHz RC oscillator, both monitored by a dedicated clock security system (CSS) with automatic failover to safe mode.
Its peripheral set includes a 10-bit ADC (2 LSB TUE, 16-channel multiplexing), advanced control timer with dead-time insertion and complementary outputs, and concurrent communication interfaces: CAN 2.0B, LINUART (LIN 2.2 compliant master/slave), USART with synchronous clock output, SPI (up to 10 Mbit/s), and I²C (400 Kbit/s).
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 safety-critical automotive firmware. |
| Max fCPU | 24 MHz; supports real-time control loops with sub-42 ns instruction cycle time at full speed. |
| Flash Memory | 128 Kbyte Flash with 20-year data retention at 55 °C; sufficient for complex ECU firmware with OTA update partitioning. |
| Data EEPROM | 2 Kbyte true data EEPROM rated for 300 kwrite cycles; retains calibration data, fault logs, and configuration across vehicle lifetime. |
| CAN Interface | High-speed CAN 2.0B compliant up to 1 Mbit/s; meets ISO 11898-2 physical layer requirements for powertrain networks. |
| Operating Temperature | −40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood deployment without derating. |
| ADC Resolution | 10-bit SAR ADC with ±2 LSB total unadjusted error (TUE); provides 1 mV resolution at 5 V reference for precise analog sensor interfacing. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced for automotive under-hood operation with exposed thermal pad (EPAD) connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 3.0–5.5 V nominal; powers CPU, peripherals, and GPIOs; requires local 100 nF decoupling per VDD pin. |
| VSS | Ground reference | Dedicated digital ground plane connection; EPAD must be soldered to PCB ground for thermal and EMI performance. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-pull or open-drain assertion; supports brown-out detection. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with high-sink capability (20 mA per pin); configurable as ADC inputs, TIM1/2 channels, or UART TX/RX. |
| PB0–PB7 | General-purpose I/O port B | 8-bit port supporting CAN RX/TX (PB4/PB5), SPI SCK/MOSI/MISO (PB1–PB3), and LINUART (PB0). |
| PC0–PC7 | General-purpose I/O port C | Includes TIM1 complementary outputs (PC4–PC6), ADC channel inputs (PC0–PC3), and I²C SCL/SDA (PC6/PC7). |
| PD0–PD7 | General-purpose I/O port D | Supports TIM2/3/4 capture/compare, USART1 TX/RX (PD5/PD6), and external interrupt sources (PD0–PD3). |
| PE0–PE7 | General-purpose I/O port E | Features SWIM debug interface (PE0), HSE crystal inputs (PE1/PE2), and additional ADC channels (PE0–PE3). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation with full electrical characterization across temperature and voltage extremes. |
| Integrated CAN 2.0B controller | Hardware mailbox management, 16 message objects, and bit-rate auto-calibration eliminate external transceiver logic overhead. |
| True data EEPROM | 2 Kbyte on-chip EEPROM with independent erase/write cycles; avoids external serial EEPROM and associated I²C bus contention. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion for motor gate drive control. |
| LINUART module | Fully LIN 2.2-compliant with automatic resynchronization, master/slave mode, and hardware checksum generation - no software bit-banging required. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time acquisition of crankshaft position, throttle angle, and oxygen sensor signals; closed-loop fuel injection timing calculation. IC Role / Device Role / Timing Role: Primary MCU executing ASAM-compliant control algorithms with deterministic 100 µs interrupt response for spark/fuel event triggering. Use Value: 24 MHz fCPU and 10-bit ADC with 16-channel mux enable simultaneous sampling of 8 analog sensors within one control cycle. |
Use Scenario: Centralized management of door locks, window lifters, interior lighting, and HVAC fan speed via LIN slave nodes. IC Role / Device Role / Timing Role: LIN master node coordinating up to 16 slave devices using hardware-resynchronized LINUART with automatic header detection. Use Value: Integrated LIN 2.2 compliance reduces firmware footprint by 3.2 kB versus software-based LIN stacks, freeing RAM for diagnostics. |
| Powertrain Gateway | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Bridging CAN FD (high-speed) and legacy CAN 2.0B (low-speed) domains while filtering and routing messages between ADAS and chassis ECUs. IC Role / Device Role / Timing Role: Dual-CAN interface handling concurrent transmit/receive on separate buses with hardware message filtering and priority arbitration. Use Value: On-chip 128 Kbyte Flash stores dual CAN protocol stacks and routing tables; eliminates external NOR flash and associated address decoding logic. |
Use Scenario: Conditioning and digitizing torque sensor (resistive bridge), motor phase current (shunt amplifier), and temperature (NTC) signals for EPS motor control loop. IC Role / Device Role / Timing Role: Analog front-end MCU with synchronized ADC sampling, DMA-triggered PWM generation, and CAN feedback transmission. Use Value: 2 LSB TUE ADC and 16 MHz internal RC oscillator trimmed to ±1% accuracy ensure <1° torque measurement error over full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF62A6TDY | 64 Kbyte Flash, 1 Kbyte EEPROM, identical pinout and peripheral set. | Suitable for cost-sensitive BCMs with smaller firmware footprints and reduced calibration storage needs. | Select when firmware size ≤ 52 Kbyte and EEPROM usage < 800 bytes to reduce BOM cost without redesign. |
| STM8AF62A9TDY | 128 Kbyte Flash, 2 Kbyte EEPROM, same LQFP64 package but rated for −40 °C to +125 °C only. | Targeted at non-under-hood applications such as infotainment head units or rear-seat entertainment controllers. | Choose for cabin modules where 150 °C rating is unnecessary and lower qualification cost is prioritized. |
Compared with STM8AF62A6TDY, the STM8AF62A8TDY provides double Flash and EEPROM capacity for complex diagnostics and calibration; versus STM8AF62A9TDY, it adds Grade 0 thermal robustness essential for direct engine bay mounting.
Availability
STM8AF62A8TDY is available at Aetrix Electronics and suitable for engine control units, body control modules, and powertrain gateways requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF62A8TDY 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 STM8AF series targets functional-safety-aware automotive applications, delivering AEC-Q100 qualified 8-bit MCUs optimized for cost-constrained, high-reliability engine, chassis, and body electronics.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for STM8AF62A8TDY?
The STM8AF62A8TDY achieves a maximum CPU frequency of 24 MHz at VDD = 4.5–5.5 V. At lower supply voltages (3.0–4.4 V), the maximum fCPU is limited to 16 MHz per the fCPUmax vs. VDD curve in Section 10.3.1 of the datasheet. This voltage-frequency scaling ensures stable operation across battery voltage fluctuations in automotive environments.
Does STM8AF62A8TDY support hardware debug during runtime without halting execution?
No - the STM8AF62A8TDY uses the Single Wire Interface Module (SWIM) for debugging, which requires entering a halted state for register inspection or memory read/write. It does not support real-time trace or background debug mode. However, SWIM enables non-intrusive breakpoint setting and live variable monitoring during development via ST-LINK/V2 or compatible debuggers.
How is CAN bus fault tolerance implemented in STM8AF62A8TDY?
The STM8AF62A8TDY integrates a CAN 2.0B controller with built-in error counters, automatic retransmission, and bus-off recovery - but does not include physical-layer transceiver circuitry. Fault tolerance relies on external ISO 11898-2 compliant transceivers (e.g., TJA1042) connected to PB4 (CAN_RX) and PB5 (CAN_TX). The MCU monitors bus status via dedicated flags and triggers interrupts on error passive or bus-off conditions.
Can the internal 16 MHz RC oscillator meet timing requirements for CAN bit rate accuracy?
Yes - the internal 16 MHz RC oscillator is factory-trimmed and user-adjustable via option bytes to ±1% accuracy across −40 °C to +150 °C, satisfying CAN's ±1.58% bit timing tolerance at 500 kbit/s. For 1 Mbit/s operation, ST recommends using the external crystal oscillator (HSE) or calibrating the RC against a precision reference during production test.
STM8AF62A8TDY 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:
- 24MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 39
- 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:
STM8AF62A8TDY FAQ
1.How can I place an order for STM8AF62A8TDY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF62A8TDY 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 STM8AF62A8TDY reliable?
The price and inventory of STM8AF62A8TDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF62A8TDY is usually 5 days.
3.What payment methods are accepted for STM8AF62A8TDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF62A8TDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF62A8TDY?
STM8AF62A8TDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF62A8TDY 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 STM8AF62A8TDY?
For technical support, including STM8AF62A8TDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF62A8TDY requirements.
6.How does Aetrix verify that STM8AF62A8TDY is sourced from the original manufacturer or authorized distributors?
All STM8AF62A8TDY 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 STM8AF62A8TDY meets industry standards.
7.What is the process for return or replacement of STM8AF62A8TDY?
All STM8AF62A8TDY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF62A8TDY, 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 STM8AF62A8TDY part is unused and in its original packaging.
Return procedure for STM8AF62A8TDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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