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STMicroelectronics STM8AF62AATCX
- Part No.:
- STM8AF62AATCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
STM8AF62AATCX.pdf
- Description:
- IC MCU 8BIT 128KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,516
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Product details
Overview
STM8AF62AATCX 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 STM8AF62AATCX datasheet, STM8AF62AATCX pinout, STM8AF62AATCX application, or STM8AF62AATCX equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and power specifications, and confirmed drop-in alternatives for ECU redesign and supply continuity planning.
Technical Context
The STM8AF62AATCX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6-cycle/instruction average, delivering 10 MIPS at 16 MHz. It integrates dual 16-bit general-purpose timers (each with up to 3 CAPCOM channels), an advanced control timer with dead-time insertion and 3 complementary outputs, and an 8-bit auto-wakeup timer.
Its communication stack includes a high-speed CAN 2.0B controller (1 Mbit/s), LINUART compliant with LIN 2.2 (master/slave with automatic resynchronization), USART with clock output for synchronous mode, SPI up to 10 Mbit/s, and I²C up to 400 Kbit/s - all supported by dedicated clock gating and interrupt vectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic 1.6-cycle instruction execution for hard real-time automotive control loops. |
| Max fCPU | 24 MHz; supports deterministic timing-critical tasks such as spark ignition sequencing and fuel injection pulse width modulation. |
| Flash Memory | 128 Kbyte Flash with 20-year data retention at 55 °C; sufficient for full ECU firmware including bootloader, diagnostics, and calibration tables. |
| Data EEPROM | 2 Kbyte true data EEPROM with 300 kcycle endurance; stores adaptive learning parameters (e.g., idle air control trim) across vehicle lifetime. |
| CAN Interface | CAN 2.0B compliant, 1 Mbit/s operation; meets ISO 11898-1 physical layer requirements for powertrain bus communication. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB total unadjusted error (TUE); provides sufficient accuracy for analog sensor inputs like throttle position and coolant temperature. |
| Operating Temperature | –40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood deployment without external thermal derating. |
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, VSS | Power supply and ground | Dual 3.3 V/5 V tolerant supply pins with internal voltage regulator bypass capability; supports direct connection to automotive battery via external LDO. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/O ports | 68 total user pins (11 high-sink capable); support alternate functions including CAN_TX/RX, LIN, USART, SPI, I²C, and ADC inputs - configurable via remapping registers. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.2–5.5 V logic levels and supports external watchdog reset assertion. |
| SWIM | Single-wire interface module | On-chip debug and programming interface using single bidirectional pin; enables in-system programming and real-time debugging without JTAG overhead. |
| OSC_IN / OSC_OUT | External crystal oscillator terminals | Supports 1–24 MHz quartz crystals; used for precise clock generation in CAN timing-critical applications where internal RC drift is unacceptable. |
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 - required for engine compartment ECUs. |
| Integrated CAN 2.0B controller | Hardware-accelerated message filtering, TX/RX FIFOs, and bit-rate auto-calibration - eliminates software overhead for CAN protocol handling in real-time control. |
| True data EEPROM | 2 Kbyte on-die EEPROM with 300 kcycle endurance and 20-year data retention at 55 °C - enables robust storage of adaptive calibration values without external serial EEPROM. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - directly drives 3-phase motor gate drivers in electric power steering modules. |
| LIN 2.2-compliant UART | Hardware LIN master/slave with automatic resynchronization and checksum generation - reduces CPU load for body electronics communication (e.g., door module networks). |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Real-time acquisition of crankshaft position, camshaft timing, and oxygen sensor signals; closed-loop control of fuel injectors and ignition coils. IC Role / Device Role / Timing Role: Primary MCU executing control algorithms with sub-microsecond interrupt latency; CAN handles powertrain bus messaging; ADC samples analog sensors at ≤100 kS/s. Use Value: Integrated CAN and 150 °C rating eliminate need for external transceivers and thermal derating, reducing BOM count and board area in compact engine bay layouts. |
Use Scenario: Monitoring transmission fluid temperature, turbine speed, and solenoid valve feedback; managing shift scheduling and torque converter lockup. IC Role / Device Role / Timing Role: Central controller coordinating hydraulic actuation via PWM-driven solenoids; LIN interfaces with gear selector and dashboard displays. Use Value: On-chip 2 Kbyte EEPROM stores learned shift adaptation profiles across vehicle life; LINUART reduces wiring complexity versus discrete UART + LIN transceiver solutions. |
| Electric Power Steering (EPS) | Body Control Module (BCM) |
Use Scenario: Sampling torque sensor and motor current feedback; generating three-phase PWM gate drive signals with synchronized dead-time control. IC Role / Device Role / Timing Role: Motor control MCU with TIM1 advanced timer driving 3-phase inverter; CAN communicates with ADAS domain controller for torque assist requests. Use Value: Hardware dead-time insertion prevents shoot-through in MOSFET half-bridges; 24 MHz fCPU ensures <1 µs PWM update resolution for smooth steering response. |
Use Scenario: Managing interior lighting dimming, window lift motors, mirror folding, and HVAC fan speed via PWM and LIN slave nodes. IC Role / Device Role / Timing Role: LIN master coordinating distributed body electronics; GPIOs drive relays and low-side switches; ADC monitors battery voltage and cabin temperature. Use Value: Single-chip integration replaces discrete MCU + LIN transceiver + EEPROM, lowering system cost and improving EMC performance in noisy vehicle environments. |
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 |
|---|---|---|---|
| STM8AF6269TDX | LQFP48 package (7×7 mm); 64 Kbyte Flash, 1 Kbyte EEPROM; same core, peripherals, and AEC-Q100 Grade 0 rating. | Fits space-constrained modules (e.g., seat control units) where full 128 Kbyte Flash and 64-pin I/O count are unnecessary. | Select when BOM simplification and smaller footprint outweigh need for maximum memory and I/O expansion. |
| RL78/F13-CD-64FB | Renesas RL78 core; 128 Kbyte Flash, 8 Kbyte RAM; CAN 2.0B, LIN, 10-bit ADC; AEC-Q100 Grade 1 (–40 °C to +125 °C). | Requires external EEPROM for long-term parameter storage; lower max ambient temperature limits use in under-hood locations. | Choose for cross-platform toolchain alignment with existing Renesas-based designs where 150 °C operation is not required. |
Compared with STM8AF6269TDX, the STM8AF62AATCX offers +64 Kbyte Flash and +1 Kbyte EEPROM in LQFP64 for complex ECU firmware, while RL78/F13-CD-64FB trades 25 °C thermal margin for larger RAM and different ecosystem dependencies.
Availability
STM8AF62AATCX is available at Aetrix Electronics and suitable for engine control units, transmission control modules, electric power steering systems, and body control modules requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF62AATCX 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 specializing in automotive, industrial, and power management ICs, with over 30 years of microcontroller innovation and AEC-Q100 qualification expertise.
The STM8A automotive MCU product line targets cost-sensitive, safety-critical engine and chassis control applications, emphasizing robustness, long-term supply stability, and seamless integration of CAN/LIN/ADC/peripheral subsystems.
FAQ
What is the maximum ambient temperature rating for STM8AF62AATCX?
The STM8AF62AATCX is AEC-Q100 Grade 0 qualified with guaranteed operation from –40 °C to +150 °C ambient temperature. This rating is validated across all electrical parameters including Flash write/erase, ADC accuracy, and CAN timing margins - enabling direct placement in engine compartments without heatsinking or derating.
Does STM8AF62AATCX include hardware debug support?
Yes, it integrates a Single-Wire Interface Module (SWIM) supporting on-chip debugging and programming via one dedicated pin. SWIM enables full breakpoint control, register inspection, and flash memory programming without requiring additional debug headers or JTAG circuitry - critical for production line programming and field firmware updates.
How is CAN bus timing accuracy ensured in STM8AF62AATCX?
CAN timing uses the internal 24 MHz HSE oscillator or external crystal (1–24 MHz) with programmable prescalers and synchronization jump width (SJW) control. The beCAN peripheral includes hardware bit-timing calculation and automatic re-synchronization on recessive-to-dominant edges - meeting ISO 11898-1 sampling point tolerance requirements across temperature and voltage variations.
Can STM8AF62AATCX operate from a 3.3 V supply in automotive environments?
Yes, it supports 3.0–5.5 V VDD operation with full functionality across the range. At 3.3 V, maximum fCPU is 16 MHz (per Figure 11 in datasheet), and all peripherals - including CAN, ADC, and timers - remain fully operational with specified timing and accuracy, making it compatible with 3.3 V automotive domain controllers and LDO-regulated subsystems.
STM8AF62AATCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 80-LQFP
- Series:
- STM8A
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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:
- 68
- 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 16x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF62AATCX FAQ
1.How can I place an order for STM8AF62AATCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF62AATCX 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 STM8AF62AATCX reliable?
The price and inventory of STM8AF62AATCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF62AATCX is usually 5 days.
3.What payment methods are accepted for STM8AF62AATCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF62AATCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF62AATCX?
STM8AF62AATCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF62AATCX 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 STM8AF62AATCX?
For technical support, including STM8AF62AATCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF62AATCX requirements.
6.How does Aetrix verify that STM8AF62AATCX is sourced from the original manufacturer or authorized distributors?
All STM8AF62AATCX 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 STM8AF62AATCX meets industry standards.
7.What is the process for return or replacement of STM8AF62AATCX?
All STM8AF62AATCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF62AATCX, 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 STM8AF62AATCX part is unused and in its original packaging.
Return procedure for STM8AF62AATCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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