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STMicroelectronics STM8AF52A9TDY
- Part No.:
- STM8AF52A9TDY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM8AF52A9TDY.pdf
- Description:
- IC MCU 8BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
STM8AF52A9TDY from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit microcontroller featuring a 24 MHz STM8A core, 128 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 from 3 to 5.5 V and supports extended temperature range up to 150 °C for engine control unit (ECU) and body electronics applications.
For engineers reviewing the STM8AF52A9TDY datasheet, STM8AF52A9TDY pinout, STM8AF52A9TDY application, or STM8AF52A9TDY equivalent, key selection criteria include automotive-grade reliability (AEC-Q100 Grade 0), on-chip CAN/LIN support for vehicle networking, high-temperature operation (−40 °C to +150 °C), Flash/data EEPROM retention at 55 °C, and nested interrupt controller with 37 external interrupt sources.
Technical Context
The STM8AF52A9TDY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, delivering 10 MIPS at 16 MHz. Its clock system integrates trimmable 16 MHz HSI and 128 kHz LSI RC oscillators plus external crystal support up to 24 MHz, with clock security monitoring.
Analog and timing subsystems include a 10-bit ADC with ±2 LSB total unadjusted error and 1 LSB linearity, two 16-bit general-purpose timers (each with up to 3 CAPCOM channels), and an advanced control timer with 4 CAPCOM channels, 3 complementary outputs, dead-time insertion, and synchronization capability - all optimized for motor control and powertrain timing tasks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic real-time execution in safety-critical automotive firmware. |
| Max fCPU | 24 MHz; supports time-critical control loops (e.g., fuel injection timing) with sub-microsecond instruction latency. |
| Flash Memory | 128 Kbyte; retains code/data for 20 years at 55 °C, suitable for long-lifecycle automotive ECU deployments. |
| Data EEPROM | 2 Kbyte true EEPROM; withstands 300 kwrite cycles for calibration storage and fault logging without external NVM. |
| CAN Interface | CAN 2.0B compliant at 1 Mbit/s; enables direct integration into vehicle CAN FD backbone networks with hardware message filtering. |
| Operating Temperature | −40 °C to +150 °C; certified for under-hood placement in engine management systems per AEC-Q100 Grade 0. |
| ADC Resolution | 10-bit with ±2 LSB TUE; provides sufficient dynamic range for sensor signal acquisition (e.g., throttle position, coolant temp). |
Pinout & Package
LQFP80 package: 80-pin, 14 × 14 mm low-profile quad flat package with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 3–5.5 V supply rails with dedicated analog/digital domains; supports independent noise isolation for ADC and digital logic. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7, PG0–PG7, PH0–PH7 | General-purpose I/O ports | Up to 68 user-configurable pins; 11 high-sink I/Os tolerate >20 mA drive for direct LED/relay control without external drivers. |
| PD0/PD1 | CAN TX/RX | Dedicated differential CAN transceiver interface; supports ISO 11898-2 physical layer compliance with internal slew-rate control. |
| PA3/PA4 | LIN UART TX/RX | Hardware LIN 2.2 master/slave support with automatic resynchronization; eliminates software bit-banging overhead in body control modules. |
| PC0–PC5 | ADC input channels | 16-channel multiplexed analog inputs; share VDDA/VSSA reference for stable measurement across temperature extremes. |
| NRST | Active-low reset | Debounced reset input with internal pull-up; meets automotive cold-cranking voltage drop immunity requirements down to 2.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation with lifetime reliability testing; required for engine control, transmission, and brake ECUs. |
| Integrated CAN 2.0B controller | Hardware message buffering and filtering; reduces CPU load during bus arbitration and enables deterministic response <100 µs. |
| Advanced control timer (TIM1) | 16-bit with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time; enables 3-phase motor gate drive without external logic. |
| True data EEPROM | 2 Kbyte nonvolatile memory with 300 kcycle endurance; stores adaptive learning parameters (e.g., idle air control trim) across ignition cycles. |
| Low-power modes (Wait/Halt) | User-definable clock gating per peripheral; achieves <1 µA halt current at 25 °C for battery-sensitive telematics modules. |
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 engines. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop combustion control algorithms with sub-10 µs interrupt latency. Use Value: Integrated CAN and LIN interfaces eliminate external protocol translators; 150 °C rating allows direct mounting near cylinder head. |
Use Scenario: Centralized control of door locks, lighting, wipers, and HVAC in passenger vehicles. IC Role / Device Role / Timing Role: Network gateway managing LIN slave nodes (e.g., mirror controls) and CAN-linked instrument clusters. Use Value: On-chip LINUART with auto-resync ensures robust communication despite battery voltage fluctuations during start-stop cycles. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
Use Scenario: Gear shift actuation, clutch pressure modulation, and torque converter lockup control in automatic transmissions. IC Role / Device Role / Timing Role: Safety-critical controller with ASIL-B capable peripherals including watchdog timers and clock monitoring. Use Value: Advanced control timer (TIM1) generates precise PWM for solenoid valve drivers with configurable dead-time to prevent shoot-through. |
Use Scenario: Motor position/velocity feedback processing and assist torque generation in column-assist EPS systems. IC Role / Device Role / Timing Role: Real-time servo controller interfacing with Hall sensors and driving 3-phase inverter bridges. Use Value: 10-bit ADC with 16-channel mux acquires motor phase currents and temperature sensors simultaneously; 2 Kbyte EEPROM stores steering angle calibration offsets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF62A9TDY | No CAN interface; identical Flash/EEPROM/RAM and temperature rating. | Suitable for LIN-only or SPI/I²C-based body electronics where CAN is unnecessary. | Select when CAN PHY cost and layout complexity must be avoided while retaining full STM8A peripheral set and AEC-Q100 Grade 0. |
| SPC560B50L5 | 32-bit Power Architecture core; higher performance but larger footprint and higher power consumption. | Targets ASIL-B/C safety applications requiring dual-core lockstep or hardware safety manager. | Choose only if functional safety certification (ISO 26262) or >20 MIPS compute throughput is mandatory; not drop-in compatible. |
Compared with STM8AF62A9TDY, the STM8AF52A9TDY adds essential CAN 2.0B for powertrain networking at no penalty in Flash size or temperature rating; versus SPC560B50L5, it offers lower BOM cost and simpler toolchain for legacy 8-bit automotive firmware migration.
Availability
STM8AF52A9TDY is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and electric power steering systems requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF52A9TDY 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 cost-sensitive, high-reliability automotive applications - especially engine, transmission, and chassis control - where AEC-Q100 Grade 0 qualification, CAN/LIN integration, and extended temperature operation are mandatory.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for STM8AF52A9TDY?
The STM8AF52A9TDY achieves a maximum CPU frequency of 24 MHz at VDD = 4.5–5.5 V. At lower voltages, the maximum fCPU scales linearly: 16 MHz is guaranteed at VDD ≥ 3.0 V, and operation down to 2.95 V is supported in reduced-performance modes per datasheet Section 10.3.1. This voltage/frequency relationship ensures deterministic timing across battery voltage variations in automotive environments.
Does STM8AF52A9TDY support hardware debug and programming in-system?
Yes - the device features a Single Wire Interface Module (SWIM) supporting full-speed in-circuit debugging, flash programming, and real-time variable inspection via ST-LINK/V2 or compatible debug probes. SWIM requires only one dedicated pin (SWIM) and shares no resources with application I/O, enabling zero-pin-debug during development and field firmware updates without design compromises.
How is the 2 Kbyte data EEPROM organized and accessed?
The 2 Kbyte data EEPROM is physically separate from program Flash and mapped into its own address space (0x4000–0x47FF). It supports byte/word write and page erase operations via dedicated EEPROM control registers (FLASH_IAPSR, FLASH_PUKR, FLASH_DUKR), with hardware write protection and option byte locking. Endurance is rated at 300,000 write/erase cycles, validated per AEC-Q100 stress testing protocols.
What are the key differences between STM8AF52A9TDY and STM8AF5289TDY?
The STM8AF52A9TDY contains 128 Kbyte Flash and 2 Kbyte data EEPROM, whereas STM8AF5289TDY has 64 Kbyte Flash and 1 Kbyte data EEPROM. Both share identical peripherals (CAN, LIN, ADC, timers), package (LQFP80), and AEC-Q100 Grade 0 qualification. The 'A' suffix denotes the highest memory density variant in the STM8AF52xx family, intended for complex firmware with extensive calibration tables and diagnostic routines.
STM8AF52A9TDY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- 52
- 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:
STM8AF52A9TDY FAQ
1.How can I place an order for STM8AF52A9TDY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF52A9TDY 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 STM8AF52A9TDY reliable?
The price and inventory of STM8AF52A9TDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF52A9TDY is usually 5 days.
3.What payment methods are accepted for STM8AF52A9TDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF52A9TDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF52A9TDY?
STM8AF52A9TDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF52A9TDY 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 STM8AF52A9TDY?
For technical support, including STM8AF52A9TDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF52A9TDY requirements.
6.How does Aetrix verify that STM8AF52A9TDY is sourced from the original manufacturer or authorized distributors?
All STM8AF52A9TDY 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 STM8AF52A9TDY meets industry standards.
7.What is the process for return or replacement of STM8AF52A9TDY?
All STM8AF52A9TDY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF52A9TDY, 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 STM8AF52A9TDY part is unused and in its original packaging.
Return procedure for STM8AF52A9TDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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