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STMicroelectronics STM8AF5269TAX
- Part No.:
- STM8AF5269TAX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM8AF5269TAX.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
STM8AF5269TAX from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit microcontroller 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 from 3 to 5.5 V across –40 °C to 150 °C and targets engine control units, body electronics, and battery management systems.
For engineers reviewing the STM8AF5269TAX datasheet, STM8AF5269TAX pinout, STM8AF5269TAX application, or STM8AF5269TAX equivalent, key selection criteria include automotive-grade temperature range (–40 °C to 150 °C), CAN/LIN dual-protocol support, on-chip data EEPROM endurance (300 kcycles), 64-pin LQFP package with high-sink I/O capability, and AEC-Q100 qualification for safety-critical subsystems.
Technical Context
The STM8AF5269TAX implements a Harvard-architecture STM8A core with 3-stage pipeline and 1.6-cycle/instruction average execution, delivering 10 MIPS at 16 MHz. Its clock system integrates user-trimmable 16 MHz RC and low-power 128 kHz RC oscillators, plus external crystal support up to 24 MHz with clock security monitoring.
Peripheral integration includes a CAN 2.0B controller with dedicated message RAM and filtering, LINUART compliant with LIN 2.2 (master/slave + auto-resync), and an advanced control timer with 4 CAPCOM channels, 3 complementary outputs, and dead-time insertion - enabling precise motor phase control in automotive actuators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time response in safety-critical automotive firmware. |
| Max fCPU | 24 MHz; supports time-critical tasks like spark timing or fuel injection control at full speed across full temperature range. |
| Flash Memory | 64 Kbyte; retains code for 20 years at 55 °C, suitable for long-lifecycle automotive ECUs without field reprogramming dependency. |
| Data EEPROM | 2 Kbyte true EEPROM; 300 kcycle endurance allows frequent calibration storage (e.g., sensor offsets, battery SOC history) without wear leveling. |
| CAN Interface | CAN 2.0B compliant, 1 Mbit/s; includes hardware message filtering and FIFO buffering for robust communication in vehicle networks. |
| ADC Resolution | 10-bit with ±2 LSB total unadjusted error; provides sufficient dynamic range for analog sensor inputs (e.g., throttle position, coolant temp). |
| Operating Temp | –40 °C to +150 °C; meets under-hood thermal requirements for engine control modules without derating. |
| AEC-Q100 Grade | Grade 0; certified for automotive applications requiring highest reliability and failure rate limits per ISO/TS 16949. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin layout optimized for automotive PCB routing, EMI resilience, and thermal dissipation in compact engine bay modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / Ground | Dual power domains support independent analog/digital supply decoupling; VDDA pin enables clean ADC reference path. |
| PX0–PX7 (X = A–F) | General-purpose I/O | Up to 68 user pins including 11 high-sink (20 mA) outputs; tolerant of current injection for noisy automotive environments. |
| PD0/PD1 | CAN TX/RX | Dedicated differential CAN transceiver interface; supports direct connection to ISO 11898-2 compliant physical layer drivers. |
| PA3/PA4 | LIN TX/RX | Single-wire LIN bus interface with automatic resynchronization; eliminates need for external LIN transceiver in slave nodes. |
| PC0–PC3 | ADC IN0–IN3 | Analog input channels with internal sampling capacitor; supports simultaneous sampling across multiple sensors via hardware trigger. |
| NRST | Reset input | Active-low reset with Schmitt-trigger input; compatible with automotive watchdog ICs and power-supply supervisors. |
| SWIM | Single-wire debug interface | Enables in-circuit programming and real-time debugging over single pin; no JTAG header required for production programming. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Control Timer (TIM1) | 16-bit with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - enables 3-phase motor gate drive without external logic. |
| Embedded Data EEPROM | 2 Kbyte true EEPROM with 300 kcycle endurance and 20-year data retention at 55 °C - eliminates need for external serial EEPROM in cost-sensitive ECUs. |
| Multi-Protocol Communication | Integrated CAN 2.0B (1 Mbit/s), LIN 2.2 (master/slave), USART, SPI (10 Mbit/s), and I²C (400 kbit/s) - reduces BOM count and PCB area in gateway modules. |
| Automotive Clock Security | Clock monitor with fail-safe reset generation upon HSE/HSI oscillator failure - satisfies ASIL-B functional safety requirements for clock integrity. |
| Low-Power Modes | Wait, Auto-wakeup, and Halt modes with configurable clock gating; achieves sub-μA current in Halt mode for battery-backed sleep states. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time management of fuel injection timing, ignition spark advance, and knock detection using crank/cam sensor inputs. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop combustion control algorithms with sub-microsecond interrupt latency. Use Value: 24 MHz CPU + 10-bit ADC + CAN interface enables deterministic execution of PID-based air-fuel ratio control and diagnostics reporting over vehicle network. |
Use Scenario: Centralized control of door locks, window lifts, lighting sequences, and HVAC fan speed in passenger compartment. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slaves (e.g., mirror controls, seat modules) and driving high-current loads via GPIO. Use Value: 11 high-sink I/Os directly drive relays and lamps; LINUART simplifies wiring harness by replacing discrete UART+LIN transceivers. |
| Battery Management System (BMS) | Electric Power Steering (EPS) |
|
Use Scenario: Monitoring cell voltages, temperatures, and state-of-charge in 12V lead-acid or 48V mild-hybrid battery packs. IC Role / Device Role / Timing Role: Analog acquisition node with calibrated ADC and EEPROM-stored compensation tables for sensor drift correction. Use Value: 2 Kbyte data EEPROM stores lifetime calibration coefficients; 10-bit ADC with 2 LSB TUE ensures accurate voltage measurement across temperature extremes. |
Use Scenario: Torque assist calculation and motor phase commutation in brushless DC steering motors. IC Role / Device Role / Timing Role: Motor control MCU generating PWM signals with synchronized dead-time and current sensing via ADC triggers. Use Value: Advanced control timer (TIM1) delivers precise 3-phase PWM with hardware dead-time insertion - eliminates software timing jitter in torque ripple critical paths. |
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 |
|---|---|---|---|
| STM8AF6269TAY | No CAN interface; identical Flash (64 KB), EEPROM (2 KB), and temperature rating (–40 °C to 150 °C); same LQFP64 package. | Suitable for LIN-only or SPI/I²C-based body electronics where CAN is unnecessary. | Select when CAN bus connectivity is not required - reduces cost and simplifies EMC design without sacrificing thermal or memory specs. |
| RL78/F13-GB | Renesas RL78 core; 32 KB Flash, 2 KB RAM, no embedded EEPROM; supports CAN 2.0B but requires external EEPROM for calibration storage. | Targets entry-level automotive clusters and instrument panels with lower peripheral integration needs. | Choose if toolchain compatibility with existing RL78 projects outweighs need for on-chip EEPROM and higher Flash density. |
Compared with STM8AF6269TAY, the STM8AF5269TAX adds essential CAN capability for powertrain networking while retaining identical memory, thermal, and packaging specs; versus RL78/F13-GB, it offers superior nonvolatile data retention architecture and higher Flash capacity for complex firmware with built-in diagnostics.
Availability
STM8AF5269TAX 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 STM8AF5269TAX 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 certification expertise.
The STM8A automotive microcontroller product line targets cost-sensitive, high-reliability embedded systems in engine, transmission, and chassis control - prioritizing AEC-Q100 compliance, on-chip nonvolatile memory, and multi-protocol communication for vehicle network integration.
FAQ
What is the maximum operating junction temperature for STM8AF5269TAX?
The device is rated for operation from –40 °C to +150 °C ambient temperature, with a maximum junction temperature of 160 °C under specified thermal conditions (θJA = 35 °C/W, 100% power dissipation). This rating is validated per AEC-Q100 Grade 0 requirements and applies to continuous operation in engine bay environments.
Does STM8AF5269TAX support in-system programming via SWIM interface?
Yes - the Single-Wire Interface Module (SWIM) enables full in-circuit programming and debugging over a single pin (SWIM), supporting flash erase/write, option byte configuration, and real-time variable inspection without halting CPU execution. No external debugger hardware is required beyond a SWIM-capable programmer.
How many CAN message objects can be configured in hardware?
The integrated bxCAN peripheral supports up to 16 message objects in dedicated RAM, with programmable acceptance filters and FIFO buffering. Each object includes ID masking, data length control, and transmit/receive status flags - enabling concurrent handling of diagnostic, control, and telemetry frames on a single CAN bus.
Is the 2 Kbyte data EEPROM accessible during program execution?
Yes - the true data EEPROM supports read-while-write (RWW) operation, allowing firmware to execute from Flash while simultaneously writing calibration data or event logs to EEPROM. Write cycles are atomic and interruptible, with hardware error detection for failed writes due to power loss or voltage droop.
STM8AF5269TAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM8A
- Packaging:
- Tape & Reel (TR)
- 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:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 16x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF5269TAX FAQ
1.How can I place an order for STM8AF5269TAX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF5269TAX 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 STM8AF5269TAX reliable?
The price and inventory of STM8AF5269TAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF5269TAX is usually 5 days.
3.What payment methods are accepted for STM8AF5269TAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF5269TAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF5269TAX?
STM8AF5269TAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF5269TAX 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 STM8AF5269TAX?
For technical support, including STM8AF5269TAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF5269TAX requirements.
6.How does Aetrix verify that STM8AF5269TAX is sourced from the original manufacturer or authorized distributors?
All STM8AF5269TAX 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 STM8AF5269TAX meets industry standards.
7.What is the process for return or replacement of STM8AF5269TAX?
All STM8AF5269TAX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF5269TAX, 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 STM8AF5269TAX part is unused and in its original packaging.
Return procedure for STM8AF5269TAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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