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STMicroelectronics STM8AF52A6UCY
- Part No.:
- STM8AF52A6UCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM8AF52A6UCY.pdf
- Description:
- IC MCU 8BIT 128KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,164
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Product details
Overview
STM8AF52A6UCY from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit MCU featuring a 24 MHz STM8A core, 64 Kbyte Flash program memory, 2 Kbyte data EEPROM, 10-bit ADC with 16-channel multiplexing, and integrated CAN 2.0B (1 Mbit/s), LIN, USART, SPI, and I²C interfaces. It operates across -40 °C to 150 °C and targets engine control units, body electronics, and battery management systems requiring high-temperature reliability and functional safety support.
For engineers reviewing the STM8AF52A6UCY datasheet, STM8AF52A6UCY pinout, STM8AF52A6UCY application, or STM8AF52A6UCY equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and interface specifications, and real-world use-case mapping - all grounded in ST's production datasheet DocID14395 Rev 15.
Technical Context
The STM8AF52A6UCY implements a Harvard-architecture STM8A core with 3-stage pipeline and 1.6 cycles/instruction average, delivering 10 MIPS at 16 MHz. Its clock system integrates user-trimmable 16 MHz HSI and 128 kHz LSI oscillators, plus external crystal support up to 24 MHz, with clock security monitoring.
It integrates dual 16-bit general-purpose timers (each with up to 3 CAPCOM channels), an advanced control timer with dead-time insertion and complementary outputs, and a dedicated auto-wakeup timer. The CAN 2.0B controller supports full mailbox management and error handling compliant with ISO 11898-1.
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 automotive firmware. |
| Max fCPU | 24 MHz; supports time-critical control loops in engine management and motor drive applications at extended temperature range. |
| Flash Memory | 64 Kbyte; retains data ≥20 years at 55 °C, enabling long-life field updates and calibration storage in automotive ECUs. |
| Data EEPROM | 2 Kbyte true EEPROM; rated for 300 kcycles endurance, suitable for wear-sensitive parameter logging and configuration persistence. |
| CAN Interface | High-speed CAN 2.0B compliant, 1 Mbit/s; includes 16 message objects, automatic retransmission, and bus-off recovery for robust vehicle networking. |
| ADC Resolution | 10-bit with ±2 LSB total unadjusted error (TUE); supports precise sensor signal acquisition (e.g., throttle position, coolant temp) under automotive voltage/temperature stress. |
| Operating Temp | -40 °C to +150 °C; qualified per AEC-Q100 Grade 0, enabling direct placement in under-hood environments without external thermal shielding. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced heat dissipation in high-ambient automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 3.0–5.5 V main supply; decoupled via external 100 nF capacitor to ensure stable operation during load transients in 12 V vehicle systems. |
| VSS | Ground reference | Dedicated analog/digital ground pins minimize noise coupling between ADC and digital logic domains. |
| NRST | Active-low reset input | Internal power-on reset and external reset capability; supports fail-safe initialization in safety-critical subsystems. |
| PA0–PA7 | General-purpose I/O port A | Up to 8 pins configurable as digital I/O, analog inputs, or alternate functions (e.g., TIM1_CH1, ADC1_IN0); 11 high-sink I/Os tolerate >20 mA sink current for direct LED/relay drive. |
| PB0–PB7 | General-purpose I/O port B | Includes CAN_RX (PB3) and CAN_TX (PB2); hardware-assisted CAN physical layer interface eliminates need for external transceiver buffering in low-noise zones. |
| PC0–PC7 | General-purpose I/O port C | Supports LINUART (PC3/PC4), SPI (PC5/PC6/PC7), and I²C (PC0/PC1); enables multi-protocol communication on single port with remappable alternate functions. |
| PD0–PD7 | General-purpose I/O port D | Includes TIM2_CH1 (PD0), TIM2_CH2 (PD1), ADC1_IN1–IN7 (PD2–PD7); allows simultaneous PWM generation and analog sensing for motor control feedback loops. |
| PE0–PE7 | General-purpose I/O port E | Features USART1_TX (PE0), USART1_RX (PE1), and TIM1_BKIN (PE2); supports synchronous serial communication and emergency brake signal injection for motor gate drivers. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for continuous operation at 150 °C ambient, meeting stringent automotive reliability and lifetime requirements for powertrain and chassis systems. |
| Integrated CAN 2.0B controller | Hardware mailbox management, automatic retransmission, and bus-off recovery reduce CPU overhead and improve network resilience in distributed ECU architectures. |
| True data EEPROM (2 Kbyte) | 300 kcycle endurance and 20-year data retention enable secure storage of calibration coefficients, odometer values, and fault logs without external non-volatile memory. |
| Advanced control timer (TIM1) | 16-bit counter with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion for precise 3-phase motor gate driving with shoot-through prevention. |
| Single-wire interface module (SWIM) | On-chip debug interface using only one pin (SWIM), enabling in-system programming and real-time debugging without dedicated JTAG pins or additional PCB routing. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time fuel injection timing, spark advance calculation, and OBD-II diagnostics in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Primary controller executing closed-loop combustion algorithms with sub-millisecond interrupt response and CAN-based actuator coordination. Use Value: 24 MHz fCPU and deterministic 1.6-cycle instruction execution ensure consistent loop timing across temperature extremes; CAN 2.0B handles high-priority engine messages at 1 Mbit/s. |
Use Scenario: Centralized lighting control, door lock actuation, window lift sequencing, and LIN slave node management in vehicle body networks. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN masters (e.g., steering column modules) and managing local PWM dimming and relay switching. Use Value: Integrated LINUART supports automatic resynchronization and master/slave modes per LIN 2.2, eliminating external protocol translators and reducing BOM count. |
| Battery Management System (BMS) | Electric Power Steering (EPS) |
Use Scenario: Cell voltage monitoring, state-of-charge estimation, thermal protection, and CAN gateway functionality in 12 V/48 V hybrid battery packs. IC Role / Device Role / Timing Role: Analog front-end processor acquiring up to 16 cell voltages via 10-bit ADC while communicating status over CAN to central vehicle controller. Use Value: 10-bit ADC with ±2 LSB TUE ensures accurate voltage measurement across wide temperature range; 2 Kbyte EEPROM stores cycle-count history and fault thresholds. |
Use Scenario: Torque assist computation, motor phase current sensing, and fail-safe torque limiting in brushless DC motor-driven steering actuators. IC Role / Device Role / Timing Role: Motor control unit generating synchronized 3-phase PWM with dead-time insertion and capturing current feedback via ADC-triggered sampling. Use Value: Advanced control timer (TIM1) provides hardware-level dead-time control and complementary outputs, preventing MOSFET shoot-through without software intervention. |
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 |
|---|---|---|---|
| STM8AF52A8UCY | 128 Kbyte Flash, same peripherals and package; higher memory for complex bootloader + application partitioning. | Suitable where OTA update capability or dual-bank firmware is required without external memory expansion. | Select when firmware size exceeds 64 Kbyte or secure boot with redundant image storage is mandated. |
| STM32F042F6P6 | 32-bit ARM Cortex-M0, 32 Kbyte Flash, no native CAN; requires external CAN transceiver and lacks AEC-Q100 Grade 0 rating. | Used in cost-sensitive, lower-temperature body applications where CAN is optional or implemented externally. | Choose only if 32-bit performance and USB are prioritized over guaranteed under-hood operation and integrated CAN. |
Compared with STM8AF52A6UCY, STM8AF52A8UCY offers scalable Flash for future firmware growth but shares identical peripheral set and thermal qualification; STM32F042F6P6 trades automotive-grade integration for 32-bit architecture and USB, requiring added components and derating for under-hood use.
Availability
STM8AF52A6UCY 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 STM8AF52A6UCY 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 product line targets automotive applications demanding AEC-Q100 qualification, extended temperature operation, and integrated communication peripherals - specifically engineered for cost-effective, high-reliability ECU implementations in powertrain, chassis, and body domains.
FAQ
What is the maximum operating temperature for STM8AF52A6UCY?
The STM8AF52A6UCY is qualified per AEC-Q100 Grade 0 and operates reliably from -40 °C to +150 °C ambient temperature. This rating is validated through accelerated life testing and thermal cycling per JEDEC standards, making it suitable for under-hood placement without heatsinking in engine control and transmission modules.
Does STM8AF52A6UCY include hardware CAN support?
Yes, STM8AF52A6UCY integrates a fully compliant CAN 2.0B controller supporting 1 Mbit/s data rate, 16 message objects, automatic retransmission, and bus-off recovery. It requires only an external CAN transceiver (e.g., TJA1042) for physical layer connection - no software protocol stack implementation is needed for basic frame transmission/reception.
How many I/O pins does STM8AF52A6UCY provide in LQFP48?
The STM8AF52A6UCY in LQFP48 package provides 38 user I/O pins across five ports (PA–PE), including 11 high-sink I/Os capable of sinking ≥20 mA. Pin functions are remappable via alternate function registers, allowing flexible allocation of UART, SPI, I²C, timer, and ADC signals without PCB redesign.
Is SWIM debugging supported on STM8AF52A6UCY?
Yes, STM8AF52A6UCY features a Single-Wire Interface Module (SWIM) that enables full in-circuit debugging and programming using only one dedicated pin (SWIM). This eliminates the need for multi-pin debug headers, reduces PCB footprint, and supports real-time variable inspection and breakpoint execution during automotive ECU development and validation.
STM8AF52A6UCY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- CANbus, I2C, LINbus, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 25
- 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 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF52A6UCY FAQ
1.How can I place an order for STM8AF52A6UCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF52A6UCY 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 STM8AF52A6UCY reliable?
The price and inventory of STM8AF52A6UCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF52A6UCY is usually 5 days.
3.What payment methods are accepted for STM8AF52A6UCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF52A6UCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF52A6UCY?
STM8AF52A6UCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF52A6UCY 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 STM8AF52A6UCY?
For technical support, including STM8AF52A6UCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF52A6UCY requirements.
6.How does Aetrix verify that STM8AF52A6UCY is sourced from the original manufacturer or authorized distributors?
All STM8AF52A6UCY 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 STM8AF52A6UCY meets industry standards.
7.What is the process for return or replacement of STM8AF52A6UCY?
All STM8AF52A6UCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF52A6UCY, 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 STM8AF52A6UCY part is unused and in its original packaging.
Return procedure for STM8AF52A6UCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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