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STMicroelectronics STM8AF6226TAY
- Part No.:
- STM8AF6226TAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6226TAY.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,475
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Product details
Overview
STM8AF6226TAY from STMicroelectronics is an AEC-Q100 qualified automotive-grade 8-bit MCU featuring a 16 MHz STM8A core, 8 Kbyte Flash memory with 20-year data retention at 55 °C, 640 byte true data EEPROM (300 kcycle endurance), 1 Kbyte RAM, 10-bit ADC with 7 muxed channels, LIN 2.2-compliant UART, SPI up to 8 Mbit/s, I²C up to 400 Kbit/s, and operation up to 150 °C - deployed in engine control modules and body electronics.
For engineers reviewing the STM8AF6226TAY datasheet, STM8AF6226TAY pinout, STM8AF6226TAY application, or STM8AF6226TAY equivalent, key selection criteria include AEC-Q100 qualification, high-temperature operation (150 °C), integrated LIN interface for automotive networking, robust I/O sink capability (21 high-sink outputs), and dual RC oscillator trimming for cost-sensitive timing stability.
Technical Context
The STM8AF6226TAY implements a Harvard-architecture STM8A core with 3-stage pipeline and extended instruction set, supporting nested interrupts across 32 vectors including up to 28 external IRQs on 7 priority levels. Its clock system integrates user-trimmable 16 MHz HSI and low-power 128 kHz LSI oscillators plus external crystal support, all monitored by a dedicated clock security system.
Peripheral integration includes an advanced 16-bit TIM1 timer with dead-time insertion and complementary outputs for motor control, a 16-bit general-purpose TIM5 with PWM/IC/OC capability, an 8-bit basic TIM6, auto-wakeup timer, independent/window watchdogs, and LINUART with automatic resynchronization - enabling deterministic real-time response in safety-critical vehicle subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline and extended instruction set - enables efficient code density and deterministic interrupt latency. |
| Max CPU Frequency | 16 MHz at VDD = 3.3–5.5 V - supports real-time control loops in engine management and chassis systems. |
| Flash Memory | 8 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle - ensures firmware integrity over full vehicle lifetime. |
| Data EEPROM | 640 byte true data EEPROM, 300 kcycle endurance - provides reliable nonvolatile parameter storage without external serial EEPROM. |
| ADC Resolution | 10-bit SAR ADC with ±1 LSB INL/DNL, 7 muxed input channels + 1 internal reference channel - delivers precise sensor signal acquisition for temperature, pressure, and position sensing. |
| LIN Interface | LINUART compliant with LIN 2.2 specification, supporting master/slave modes and automatic resynchronization - eliminates need for external LIN transceiver in cost-sensitive nodes. |
| Operating Temperature | −40 °C to +150 °C - qualified for under-hood applications including transmission control units and battery management sensors. |
| Supply Voltage | 3.0 V to 5.5 V - compatible with both 3.3 V and 5 V automotive power domains without level-shifting. |
Pinout & Package
LQFP32 (7 × 7 mm) and VFQFPN32 (5 × 5 mm) packages are supported; STM8AF6226TAY specifically uses the LQFP32 package with 32-pin layout optimized for automotive PCB routing and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3.0–5.5 V supply rail; decoupled via external 100 nF capacitor to ensure stable core and peripheral operation. |
| VSS | Ground reference | Digital ground return path; separate analog/digital ground not required due to integrated noise-immune design. |
| NRST | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts external reset signals or microcontroller-initiated reset sequences. |
| PA0–PA7 | Programmable GPIO port A | 8-bit bidirectional port with high-sink capability (up to 20 mA per pin); supports alternate functions including TIM1, ADC, and SPI. |
| PB0–PB7 | Programmable GPIO port B | 8-bit bidirectional port with interrupt-on-change capability; configured for LINUART, I²C, and TIM5 functions in default mapping. |
| PC0–PC7 | Programmable GPIO port C | 8-bit port supporting TIM1 complementary outputs, ADC inputs, and SWIM debug interface; includes remappable alternate functions. |
| PD0–PD7 | Programmable GPIO port D | 8-bit port with 21 total high-sink I/Os across ports A–D; enables direct drive of LEDs, relays, and small solenoids without external drivers. |
| SWIM | Single-wire interface module | 2-pin debug interface (SWIM + VDD) supporting programming and real-time debugging without JTAG overhead. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation with full automotive reliability testing - meets OEM requirements for powertrain and safety-critical ECUs. |
| User-trimmable 16 MHz RC oscillator | ±1% accuracy after trimming - eliminates external crystal for LIN timing while maintaining <1.5% baud rate error over temperature. |
| High-sink I/O capability | 21 pins rated for 20 mA sink current - directly drives automotive loads like indicator lamps and small actuators without discrete driver stages. |
| Integrated LIN 2.2 UART | Hardware-based LIN frame generation, checksum calculation, and automatic resynchronization - reduces CPU load and improves network timing jitter. |
| Robust ESD immunity | ±4 kV HBM ESD rating on all I/Os - withstands harsh automotive assembly and service environments without protection diodes. |
| Low-power modes with wakeup sources | Wait, auto-wakeup, and active halt modes consuming as low as 1.2 µA - extends battery life in always-on vehicle modules like door controllers. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and coolant temperature in gasoline/diesel engines. IC Role / Device Role / Timing Role: Primary controller executing fuel injection timing, spark advance, and idle speed regulation with sub-millisecond loop resolution. Use Value: 16 MHz CPU + hardware TIM1 dead-time insertion enables precise ignition coil driver sequencing; LIN interface connects to dashboard and transmission ECUs using single-wire bus. |
Use Scenario: Centralized management of interior lighting, window lifters, mirror controls, and door lock actuators. IC Role / Device Role / Timing Role: System coordinator interfacing with CAN gateway and local LIN slaves (e.g., seat modules, HVAC nodes). Use Value: 21 high-sink I/Os drive LED indicators and small DC motors directly; 150 °C rating allows placement near fuse boxes or junction panels. |
| Transmission Control Unit (TCU) | Battery Management Sensor Node |
Use Scenario: Gear shift logic, clutch engagement timing, and torque converter lockup control in automatic transmissions. IC Role / Device Role / Timing Role: Safety-monitored controller with watchdog supervision and redundant ADC sampling for hydraulic pressure feedback. Use Value: Independent and window watchdog timers enforce fail-safe behavior; 10-bit ADC with analog watchdog detects sensor faults before actuator misfire. |
Use Scenario: Monitoring cell voltage, pack temperature, and insulation resistance in 12 V auxiliary battery systems. IC Role / Device Role / Timing Role: Standalone sensor concentrator communicating via LIN to main BMS controller. Use Value: Integrated LINUART eliminates external transceiver; 640 byte EEPROM stores calibration offsets and fault logs across 300,000 cycles. |
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 |
|---|---|---|---|
| STM8AF6223TAY | 4 Kbyte Flash, same peripherals and package - lacks 4 Kbyte of program memory and associated EEPROM allocation. | Suitable for simpler LIN slave nodes with smaller firmware footprints (e.g., mirror control, seat position memory). | Select when firmware size ≤ 32 KB and no future feature expansion is planned. |
| RL78/F13 | Renesas RL78 core, 24 MHz max, 16 Kbyte Flash, 1.25 KB RAM, LIN support - higher performance but larger footprint and different toolchain. | Used in next-generation BCMs requiring CAN FD gateway functionality alongside LIN. | Choose for migration paths needing CAN FD or larger memory; requires requalification and toolchain investment. |
Compared with STM8AF6223TAY, the STM8AF6226TAY provides double Flash and EEPROM capacity for complex diagnostics and calibration tables; versus RL78/F13, it offers lower BOM cost and proven qualification history in legacy automotive platforms.
Availability
STM8AF6226TAY is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across extended automotive production lifecycles.
Supply support for STM8AF6226TAY 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 embedded control applications - emphasizing AEC-Q100 qualification, extended temperature range, and integrated LIN/CAN-ready peripherals for vehicle subsystems.
FAQ
Is STM8AF6226TAY pin-compatible with other STM8AF62xx variants?
Yes - STM8AF6226TAY shares identical LQFP32 pinout with STM8AF6223TAY and STM8AF6213TAY. All share the same peripheral mapping and I/O assignment; only Flash (8 KB vs. 4 KB) and EEPROM (640 B vs. 320 B) differ. No PCB redesign is needed when upgrading firmware capacity within the same package family.
Does STM8AF6226TAY require an external crystal for LIN operation?
No - the integrated user-trimmable 16 MHz RC oscillator achieves <1.5% LIN baud rate accuracy across −40 °C to +125 °C after one-time trimming at room temperature. External crystals are optional for higher precision or when synchronizing multiple peripherals to a common clock source.
What debug interfaces does STM8AF6226TAY support?
STM8AF6226TAY uses the Single-Wire Interface Module (SWIM) for programming and debugging via a 2-pin connection (SWIM and VDD). It supports full-speed execution control, register inspection, and Flash memory read/write - no JTAG header or additional debug probe required beyond ST-LINK/V2 or compatible tools.
How is the 150 °C operating temperature validated?
STM8AF6226TAY undergoes full AEC-Q100 Grade 0 qualification, including 1000-hour high-temperature operating life (HTOL) testing at 150 °C, temperature cycling (−40 °C to +150 °C), and package reliability tests. Electrical parameters are characterized across the full range, with guaranteed timing and ADC accuracy maintained up to 150 °C ambient.
STM8AF6226TAY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 28
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 640 x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 7x10b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6226TAY FAQ
1.How can I place an order for STM8AF6226TAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6226TAY 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 STM8AF6226TAY reliable?
The price and inventory of STM8AF6226TAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6226TAY is usually 5 days.
3.What payment methods are accepted for STM8AF6226TAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6226TAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6226TAY?
STM8AF6226TAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6226TAY 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 STM8AF6226TAY?
For technical support, including STM8AF6226TAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6226TAY requirements.
6.How does Aetrix verify that STM8AF6226TAY is sourced from the original manufacturer or authorized distributors?
All STM8AF6226TAY 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 STM8AF6226TAY meets industry standards.
7.What is the process for return or replacement of STM8AF6226TAY?
All STM8AF6226TAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6226TAY, 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 STM8AF6226TAY part is unused and in its original packaging.
Return procedure for STM8AF6226TAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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