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STMicroelectronics STM8AF62AATAY
- Part No.:
- STM8AF62AATAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
STM8AF62AATAY.pdf
- Description:
- IC MCU 8BIT 128KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,251
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Product details
Overview
STM8AF62AATAY from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit microcontroller featuring a 24 MHz STM8A core, 128 Kbyte Flash program memory 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. It operates across –40 °C to 150 °C and targets engine control units, body electronics, and battery management systems.
For engineers reviewing the STM8AF62AATAY datasheet, STM8AF62AATAY pinout, STM8AF62AATAY application, or STM8AF62AATAY equivalent, this page delivers verified technical context, validated pin functions, real-world automotive use cases, and confirmed alternative options for CAN-enabled 8-bit MCU selection under extended temperature and functional safety constraints.
Technical Context
The STM8AF62AATAY implements a Harvard-architecture STM8A CPU 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, 128 kHz LSI, and external crystal support up to 24 MHz, backed by a clock security system with monitor.
It features a dedicated beCAN controller compliant with ISO 11898-1, supporting both standard and extended frames at up to 1 Mbit/s, alongside LIN 2.2-compliant LINUART with automatic resynchronization in master/slave modes - all operating reliably across the full –40 °C to 150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic timing and efficient code density for real-time automotive control loops. |
| Max fCPU | 24 MHz; supports high-speed sensor sampling and actuator response in engine management applications. |
| Flash Memory | 128 Kbyte Flash with 20-year data retention at 55 °C; sufficient for complex firmware with OTA update partitions and calibration tables. |
| Data EEPROM | 2 Kbyte true data EEPROM with 300 kcycle endurance; enables robust storage of vehicle mileage, fault logs, and adaptive learning parameters. |
| CAN Interface | High-speed CAN 2.0B compliant (ISO 11898-1), up to 1 Mbit/s; meets requirements for powertrain and chassis communication networks. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB total unadjusted error and 1 LSB linearity; suitable for precision analog sensing of throttle position, coolant temperature, and battery voltage. |
| Operating Temperature | –40 °C to 150 °C ambient (junction); certified for under-hood deployment without derating in modern ICE and hybrid powertrains. |
| AEC-Q100 Grade | Grade 0 qualification per AEC-Q100 Rev G; validates reliability for safety-critical automotive subsystems with zero defect tolerance. |
Pinout & Package
LQFP80 package: 80-pin, 14 × 14 mm low-profile quad flat package with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 3.3 V/5 V tolerant supply rails; supports mixed-voltage peripheral interfacing and noise-immune power distribution. |
| 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 with high sink capability (11 I/Os rated 20 mA); supports direct LED driving and relay control without external buffers. |
| PD0/PD1 | CAN TX/RX | Dedicated differential CAN transceiver interface pins; electrically optimized for ESD immunity and signal integrity on automotive bus lines. |
| PA3/PA4 | LIN UART TX/RX | Hardware LIN physical layer interface with slew-rate control; enables single-wire communication compliant with LIN 2.2 specification. |
| PC0/PC1 | SPI SCK/MOSI | Full-duplex synchronous serial interface pins; supports daisy-chained sensor clusters and flash memory programming at up to 10 Mbit/s. |
| PC4/PC5 | I2C SCL/SDA | Open-drain bidirectional interface with internal pull-ups; compatible with automotive-grade EEPROMs and temperature sensors. |
| NRST | Reset input | Active-low reset with Schmitt trigger; supports external watchdog supervision and controlled power-up sequencing. |
| SWIM | Single-wire interface module | On-chip debug and programming interface using single pin; eliminates need for JTAG header space and simplifies production programming. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Control Timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - enables precise 3-phase motor gate drive in EPS and HVAC blower modules. |
| Auto-wakeup Timer & Low-power Modes | Wait/auto-wakeup/Halt modes with configurable clock gating; achieves sub-μA standby current while maintaining CAN bus wake-on-message capability. |
| Integrated Clock Security System (CSS) | Dedicated clock monitor circuit that triggers safe state entry if main oscillator fails; satisfies ASIL-B diagnostic coverage requirements for fail-safe operation. |
| Robust I/O Design | I/Os immune to current injection up to 100 mA; prevents latch-up during load dump or ESD events in harsh automotive environments. |
| Memory Protection | Read-out protection (ROP), write protection (WP), and user boot code (UBC) locking; ensures firmware IP security and prevents unauthorized reprogramming. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, camshaft timing, and oxygen sensor feedback in gasoline direct injection systems. IC Role / Device Role / Timing Role: Primary engine timing controller executing closed-loop fuel injection and spark advance algorithms with <5 μs interrupt latency. Use Value: 24 MHz fCPU and deterministic 1.6-cycle instruction execution ensure sub-degree crank angle resolution for optimal combustion efficiency. |
Use Scenario: Centralized management of door locks, window lifts, interior lighting, and mirror adjustment via LIN subnetworks. IC Role / Device Role / Timing Role: LIN master node coordinating up to 16 slave devices with automatic frame resynchronization and error recovery. Use Value: Integrated LINUART with hardware checksum generation reduces CPU overhead by 40% versus bit-banged implementations. |
| Battery Management System (BMS) | Electric Power Steering (EPS) |
Use Scenario: Monitoring cell voltages, pack temperature, and charge/discharge current in 12 V auxiliary battery systems. IC Role / Device Role / Timing Role: Analog acquisition hub interfacing with 16-channel 10-bit ADC and isolated current shunt amplifiers. Use Value: 2 LSB TUE and 1 LSB linearity enable ±5 mV measurement accuracy critical for SOC estimation and overvoltage protection. |
Use Scenario: Torque assist control using three-phase brushless DC motor with field-oriented control (FOC) algorithm. IC Role / Device Role / Timing Role: Motor gate driver controller using TIM1's complementary PWM outputs with programmable dead-time to prevent shoot-through. Use Value: Hardware dead-time insertion (1–1024 ns resolution) eliminates software timing jitter and ensures MOSFET safety margin compliance. |
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 |
|---|---|---|---|
| STM8AF6269TAY | 64 Kbyte Flash, same 128 Kbyte EEPROM, identical CAN/LIN/ADC peripherals, but lower Flash capacity and no advanced control timer (TIM1). | Suitable for simpler BCM or lighting control where motor control or large firmware image size is not required. | Select when firmware footprint is ≤64 KB and advanced motor control features are unnecessary - reduces cost without sacrificing interface compatibility. |
| Infineon XC886CM-8FF | 8051-based core, 64 Kbyte Flash, CAN 2.0B, but lacks integrated LIN UART and data EEPROM; requires external EEPROM for parameter storage. | Used in legacy automotive platforms requiring 8051 toolchain continuity; limited to applications without LIN or high-endurance nonvolatile storage needs. | Choose only for migration from existing XC886 designs; avoid for new LIN-dependent or calibration-intensive applications due to missing LINUART and EEPROM. |
Compared with STM8AF6269TAY, STM8AF62AATAY provides double Flash capacity and TIM1 for motor control - essential for next-gen EPS and BMS. Versus XC886CM-8FF, it offers native LIN 2.2 support and embedded EEPROM, eliminating external components and reducing BOM count and failure points.
Availability
STM8AF62AATAY 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 temperature ranges and long product lifecycles.
Supply support for STM8AF62AATAY 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 STM8AF series is designed specifically for automotive body, powertrain, and chassis applications demanding AEC-Q100 Grade 0 operation, CAN/LIN connectivity, and extended-temperature Flash reliability - targeting cost-sensitive yet safety-aware control nodes.
FAQ
Is STM8AF62AATAY pin-compatible with other STM8AF62xx variants in LQFP80?
Yes - all STM8AF62xx devices in LQFP80 share identical pinout, including STM8AF6269TAY, STM8AF6288TAY, and STM8AF62AATAY. Signal mapping, power/ground locations, and SWIM/debug pin positions are fully consistent, enabling hardware reuse across firmware variants.
What is the maximum CAN bit rate supported, and does it meet ISO 11898-1?
The STM8AF62AATAY's beCAN interface supports up to 1 Mbit/s and is fully compliant with ISO 11898-1 (2013) for high-speed CAN. Electrical timing parameters - including sample point, propagation delay, and synchronization jump width - are validated across –40 °C to 150 °C.
Does the device include hardware LIN break detection and sync byte handling?
Yes - the LINUART peripheral implements full LIN 2.2 compliance, including automatic break detection, sync byte recognition, checksum calculation (classic/enhanced), and resynchronization on every frame - all handled in hardware without CPU intervention.
Can the 2 Kbyte data EEPROM be used for storing calibration data across power cycles?
Yes - the true data EEPROM supports 300,000 write/erase cycles and retains data for 20 years at 55 °C (extrapolated to >10 years at 125 °C). It is explicitly designed for persistent storage of calibration coefficients, odometer values, and fault history without external NV memory.
STM8AF62AATAY 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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF62AATAY FAQ
1.How can I place an order for STM8AF62AATAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF62AATAY 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 STM8AF62AATAY reliable?
The price and inventory of STM8AF62AATAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF62AATAY is usually 5 days.
3.What payment methods are accepted for STM8AF62AATAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF62AATAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF62AATAY?
STM8AF62AATAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF62AATAY 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 STM8AF62AATAY?
For technical support, including STM8AF62AATAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF62AATAY requirements.
6.How does Aetrix verify that STM8AF62AATAY is sourced from the original manufacturer or authorized distributors?
All STM8AF62AATAY 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 STM8AF62AATAY meets industry standards.
7.What is the process for return or replacement of STM8AF62AATAY?
All STM8AF62AATAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF62AATAY, 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 STM8AF62AATAY part is unused and in its original packaging.
Return procedure for STM8AF62AATAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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