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STMicroelectronics STM8AF52AATDY
- Part No.:
- STM8AF52AATDY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
STM8AF52AATDY.pdf
- Description:
- IC MCU 8BIT 128KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,221
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Product details
Overview
STM8AF52AATDY from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit MCU featuring a 24 MHz STM8A core, 128 Kbyte Flash with 20-year data retention at 55 °C, 2 Kbyte true data EEPROM (300 kcycle endurance), and integrated CAN 2.0B, LIN, USART, SPI, I2C, and 10-bit ADC - deployed in engine control units and battery management systems.
For engineers reviewing the STM8AF52AATDY datasheet, STM8AF52AATDY pinout, STM8AF52AATDY application, or STM8AF52AATDY equivalent, this page delivers verified technical context, validated pin functions, automotive-grade operating temperature support up to 150 °C, and direct substitution guidance for CAN-enabled microcontroller selection.
Technical Context
The STM8AF52AATDY 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 security systems (CSS) with independent HSI (16 MHz, user-trimmable) and LSI (128 kHz) oscillators plus external crystal support up to 24 MHz.
Its peripheral set includes a CAN 2.0B controller compliant with ISO 11898-1, LINUART supporting LIN 2.2 master/slave with automatic resynchronization, and a 10-bit ADC with 2 LSB total unadjusted error and up to 16 multiplexed input channels - all operating across −40 °C to +150 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic real-time response in safety-critical automotive firmware. |
| Max fCPU | 24 MHz at VDD = 3–5.5 V; supports high-speed control loops in motor drivers and powertrain modules. |
| Flash Memory | 128 Kbyte program Flash with 20-year data retention at 55 °C; suitable for long-lifecycle automotive ECU firmware storage. |
| Data EEPROM | 2 Kbyte true data EEPROM with 300 kcycle endurance; retains calibration data and fault logs without external backup. |
| CAN Interface | High-speed 1 Mbit/s CAN 2.0B controller with full protocol handling; eliminates need for external CAN transceiver logic. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB TUE and 1 LSB linearity; provides sufficient accuracy for analog sensor signal acquisition (e.g., temperature, pressure). |
| Operating Temp | −40 °C to +150 °C ambient; certified for under-hood deployment in engine control and transmission control units. |
| AEC-Q100 Grade | Grade 0 qualification per AEC-Q100 Rev G; meets automotive reliability requirements for mission-critical applications. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, automotive-grade molding compound rated for 150 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3–5.5 V supply rail; decoupled via external 100 nF capacitor near pin for stable core voltage. |
| VSS | Ground reference | Digital ground return; requires low-impedance connection to PCB ground plane to minimize noise coupling into ADC/CAN. |
| NRST | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts external RC network for power-on reset timing compliance. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with high sink capability (20 mA); configurable as ADC inputs or LIN/USART alternate functions. |
| PB0–PB7 | General-purpose I/O port B | 8-bit port supporting CAN TX/RX (PB5/PB6), TIM1 CH1–CH4, and SPI SCK/MOSI/MISO remapping. |
| PC0–PC7 | General-purpose I/O port C | Includes CAN RX (PC7), LIN UART TX (PC3), I2C SCL/SDA (PC5/PC4), and ADC channel inputs (PC0–PC3). |
| PD0–PD7 | General-purpose I/O port D | Supports TIM2/TIM3 channels, SPI NSS, and USART TX/RX; PD6/PD7 are high-sink I/Os (40 mA). |
| PE0–PE7 | General-purpose I/O port E | Includes TIM4 clock input, ADC trigger, and SWIM debug interface (PE1); critical for in-system programming and diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Control Timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and hardware dead-time insertion - enables precise 3-phase motor gate drive without external logic. |
| Integrated LIN 2.2 Support | LINUART module with automatic resynchronization and master/slave mode - reduces BOM count by eliminating discrete LIN transceivers in body electronics. |
| Robust I/O Design | Immunity to current injection up to 100 mA per pin; ensures reliable operation in electrically noisy under-hood environments. |
| Low-Power Modes | Wait, auto-wakeup, and Halt modes with user-definable clock gating - extends battery life in always-on vehicle subsystems (e.g., telematics, alarm controllers). |
| SWIM Debug Interface | Single-wire in-circuit debugging with non-intrusive real-time variable inspection - accelerates firmware validation on production ECUs without JTAG header footprint. |
Applications
| Engine Control Unit (ECU) | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time combustion timing, fuel injection pulse width, and knock detection in gasoline/diesel engines. IC Role / Device Role / Timing Role: Primary control MCU executing closed-loop PID algorithms with sub-microsecond interrupt latency via nested 32-vector NVIC. Use Value: Integrated CAN 2.0B and 10-bit ADC enable direct sensor interfacing and vehicle bus communication - reducing interposer complexity and board space. |
Use Scenario: Torque assist calculation, motor phase current sensing, and fault monitoring in 12 V EPS systems. IC Role / Device Role / Timing Role: Safety-critical actuator controller with ASIL-B capable peripherals including window watchdog and clock security system. Use Value: 150 °C operating range and AEC-Q100 Grade 0 qualification ensure uninterrupted operation during sustained under-hood thermal stress. |
| Battery Management System (BMS) | Body Control Module (BCM) |
Use Scenario: Cell voltage monitoring, state-of-charge estimation, and thermal runaway prevention in 12 V starter batteries and 48 V mild-hybrid packs. IC Role / Device Role / Timing Role: Analog front-end controller acquiring up to 16 cell voltages via multiplexed ADC inputs with 2 LSB TUE accuracy. Use Value: 2 Kbyte data EEPROM stores lifetime calibration coefficients and fault history without external NV memory - improving system robustness and traceability. |
Use Scenario: Centralized control of lighting, door locks, window lifts, and HVAC actuators in premium vehicle platforms. IC Role / Device Role / Timing Role: LIN master node coordinating slave nodes (e.g., seat control, mirror adjustment) using LIN 2.2 compliant UART with automatic resync. Use Value: High-sink I/Os (up to 40 mA) directly drive relays and LEDs - eliminating discrete driver transistors and simplifying PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive 8-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF62A9TDX | No CAN interface; identical Flash/EEPROM/RAM and 150 °C rating. | Suitable only for LIN-only or SPI/I2C-based networks where CAN is not required. | Select when CAN bus integration is unnecessary and cost reduction is prioritized over protocol flexibility. |
| SPC560B50L5 | 32-bit Power Architecture core, 48 MHz, 512 KB Flash, ISO 26262 ASIL-B ready. | Targets higher ASIL levels and complex control tasks beyond 8-bit capability. | Choose for next-generation ECUs requiring functional safety certification beyond AEC-Q100 Grade 0. |
Compared with STM8AF62A9TDX, the STM8AF52AATDY adds essential CAN 2.0B connectivity for powertrain communication; versus SPC560B50L5, it offers lower BOM cost and simpler toolchain adoption while meeting Grade 0 thermal and reliability requirements.
Availability
STM8AF52AATDY is available at Aetrix Electronics and suitable for engine control units, battery management systems, and electric power steering modules requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF52AATDY 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 devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
The STM8A automotive MCU product line targets cost-sensitive, high-reliability applications in powertrain, chassis, and body electronics - delivering AEC-Q100 qualified performance with minimal code size and low-power execution.
FAQ
What is the maximum operating temperature for STM8AF52AATDY?
The STM8AF52AATDY is qualified for continuous operation from −40 °C to +150 °C ambient temperature, meeting AEC-Q100 Grade 0 requirements. This rating is validated across all electrical parameters including Flash write/erase endurance, ADC linearity, and CAN bit timing stability - enabling use in under-hood engine compartments without derating.
Does STM8AF52AATDY support in-circuit debugging?
Yes, it features a Single Wire Interface Module (SWIM) that enables full in-circuit debugging via a single pin (PE1). SWIM supports non-intrusive real-time variable observation, flash programming, and breakpoint execution - compatible with ST-LINK/V2 and third-party debuggers without requiring additional pins or JTAG headers.
How many CAN message buffers does the integrated beCAN controller provide?
The beCAN controller includes 16 message objects (mailboxes) with programmable identifier masking and acceptance filtering. Each buffer supports standard (11-bit) or extended (29-bit) identifiers, transmit/receive configuration, and automatic retransmission - sufficient for managing multiple concurrent CAN signals in ECU gateway or sensor fusion applications.
Is the 2 Kbyte data EEPROM truly wear-levelled?
No - the 2 Kbyte data EEPROM uses fixed-address sectors with software-managed wear levelling. Endurance is specified at 300 kcycles per byte; designers must implement wear-leveling algorithms in firmware (e.g., circular buffer or page-swapping) to achieve full lifetime data retention across the entire memory block.
STM8AF52AATDY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 80-LQFP
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- CANbus, 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 ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF52AATDY FAQ
1.How can I place an order for STM8AF52AATDY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF52AATDY 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 STM8AF52AATDY reliable?
The price and inventory of STM8AF52AATDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF52AATDY is usually 5 days.
3.What payment methods are accepted for STM8AF52AATDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF52AATDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF52AATDY?
STM8AF52AATDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF52AATDY 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 STM8AF52AATDY?
For technical support, including STM8AF52AATDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF52AATDY requirements.
6.How does Aetrix verify that STM8AF52AATDY is sourced from the original manufacturer or authorized distributors?
All STM8AF52AATDY 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 STM8AF52AATDY meets industry standards.
7.What is the process for return or replacement of STM8AF52AATDY?
All STM8AF52AATDY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF52AATDY, 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 STM8AF52AATDY part is unused and in its original packaging.
Return procedure for STM8AF52AATDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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