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STMicroelectronics STM8AF5289TCY
- Part No.:
- STM8AF5289TCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM8AF5289TCY.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,095
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Product details
Overview
STM8AF5289TCY 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 interface operating up to 1 Mbit/s - deployed in engine control units for real-time sensor signal acquisition and actuator command execution.
For engineers reviewing the STM8AF5289TCY datasheet, STM8AF5289TCY pinout, STM8AF5289TCY application, or STM8AF5289TCY equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and power specifications, and confirmed drop-in alternatives for ECU and body control module design.
Technical Context
The device implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, achieving 10 MIPS at 16 MHz. It integrates dual clock domains: a user-trimmable 16 MHz RC oscillator and a low-power 128 kHz RC oscillator, both monitored by a dedicated clock security system (CSS) with failover detection.
Its peripheral set includes a 10-bit ADC (2 LSB TUE, 16-channel multiplexing), three 16-bit timers (two general-purpose with CAPCOM, one advanced with dead-time insertion and complementary outputs), and LINUART compliant with LIN 2.2 master/slave operation including automatic resynchronization - all operating across –40 °C to +150 °C ambient temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic interrupt latency and 10 MIPS @ 16 MHz for time-critical automotive tasks. |
| Flash Memory | 128 Kbyte on-chip Flash; supports 20-year data retention at 55 °C and in-system programming via SWIM interface. |
| Data EEPROM | 2 Kbyte true data EEPROM; rated for 300,000 write/erase cycles, eliminating need for external nonvolatile storage in calibration data logging. |
| CAN Interface | CAN 2.0B compliant controller; operates up to 1 Mbit/s with hardware message filtering and FIFO buffering for robust vehicle network communication. |
| ADC Resolution | 10-bit SAR ADC with ±2 LSB total unadjusted error; supports 16 multiplexed inputs and hardware-triggered conversions synchronized to timer events. |
| Operating Temperature | –40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0, enabling direct placement in under-hood engine compartment environments. |
| I/O Count | Up to 68 user I/O pins; includes 11 high-sink outputs (20 mA) and current-injection-immune design for noisy automotive electrical systems. |
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 3–5.5 V supply domain with internal voltage regulator; VCAP capacitor required for stable core voltage regulation. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset assertion and watchdog-induced reset recovery. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7, PG0–PG7, PH0–PH7 | General-purpose bidirectional I/O | Configurable as digital input/output, alternate function (timers, UART, SPI, I²C, CAN), or analog input; 11 pins support 20 mA sink capability. |
| PA1, PA2, PA3 | CAN_TX, CAN_RX, CAN_STB | Dedicated CAN physical layer interface pins; CAN_STB enables standby mode to reduce bus leakage current during sleep. |
| PA4, PA5 | LIN_TX, LIN_RX | Hardware LIN transceiver interface supporting LIN 2.2 master/slave modes with automatic baud rate resynchronization. |
| PC0–PC3 | ADC_IN0–ADC_IN3 | Analog input channels mapped to 10-bit ADC; support single-ended or differential sampling with programmable sampling time. |
Key Features
| Feature | Design Value |
|---|---|
| SWIM debug interface | Single-wire in-circuit programming and debugging; enables full flash read/write, RAM access, and breakpoint control without dedicated debug pins. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - essential for 3-phase motor gate drive control. |
| Low-power modes | Wait, Auto-wakeup, Halt, and Active-halt modes with selective peripheral clock gating; achieves <1 μA halt current at 25 °C with RTC active. |
| Internal oscillators | Trimmed 16 MHz RC (±1% over temperature) and 128 kHz RC (±40%); eliminates need for external crystals in cost-sensitive applications while maintaining CAN timing compliance. |
| Memory protection | Read-out protection (ROP), write protection (WP), and user boot code (UBC) lock bits; prevents unauthorized firmware extraction or accidental overwrite of bootloader region. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time acquisition of crankshaft position, throttle angle, and coolant temperature signals; closed-loop fuel injection and ignition timing calculation. IC Role / Device Role / Timing Role: Primary MCU executing control algorithms with sub-millisecond interrupt response; CAN handles communication with dashboard and transmission ECUs. Use Value: 150 °C rating allows direct mounting near engine block; 10-bit ADC with hardware triggering ensures precise sensor sampling aligned to crankshaft rotation events. |
Use Scenario: Centralized management of door locks, window lifts, interior lighting, and mirror adjustment using LIN slave nodes. IC Role / Device Role / Timing Role: Master node on LIN bus coordinating distributed peripherals; USART and LINUART provide dual serial protocol support for legacy and new subsystems. Use Value: Integrated LIN 2.2 master mode with auto-resync eliminates external LIN transceiver; 68 I/Os enable direct drive of relays and LEDs without external logic. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
Use Scenario: Gear selection logic, solenoid valve actuation, and torque converter clutch control based on vehicle speed and engine load. IC Role / Device Role / Timing Role: Safety-critical controller interfacing with CAN network for torque request and status reporting; advanced timer (TIM1) generates PWM for proportional solenoid drivers. Use Value: AEC-Q100 Grade 0 qualification ensures reliability under vibration and thermal cycling; dead-time insertion prevents shoot-through in H-bridge solenoid drivers. |
Use Scenario: Torque assist calculation using steering angle, motor current, and vehicle speed inputs; real-time motor phase commutation via 3-phase inverter. IC Role / Device Role / Timing Role: High-precision motor controller with synchronized ADC sampling and complementary PWM output on TIM1; CAN reports fault status to vehicle gateway. Use Value: 16-bit advanced timer with 3 complementary outputs and dead-time control enables safe, efficient BLDC motor drive without external gate driver ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF6289TCY | No CAN interface; identical Flash/EEPROM/RAM, same 150 °C rating and LIN/USART/SPI/I²C peripherals. | Suitable for LIN-only body electronics where CAN is unnecessary; reduces BOM cost and layout complexity. | Select when CAN bus connectivity is not required and cost optimization is prioritized without sacrificing temperature or memory specs. |
| STM32F072RBT6 | 32-bit ARM Cortex-M0 core, 128 KB Flash, 16 KB RAM, USB 2.0, no LIN but includes CAN 2.0B; operates up to 105 °C (AEC-Q100 Grade 2). | Better computational throughput and USB host capability; limited to 105 °C - unsuitable for under-hood placement without derating. | Choose for next-generation designs needing USB diagnostics or higher processing headroom, accepting lower ambient temperature ceiling. |
Compared with STM8AF6289TCY, the STM8AF5289TCY adds CAN 2.0B at no penalty to memory or temperature rating; versus STM32F072RBT6, it trades 32-bit performance and USB for guaranteed 150 °C operation and native LIN 2.2 support - critical for cost-sensitive, thermally demanding automotive modules.
Availability
STM8AF5289TCY is available at Aetrix Electronics and suitable for engine control units, transmission control units, and electric power steering systems requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF5289TCY 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-optimized, high-reliability embedded control in harsh environments - emphasizing AEC-Q100 qualification, extended temperature operation, and integrated communication interfaces like CAN and LIN.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for the STM8AF5289TCY?
The STM8AF5289TCY supports a maximum CPU frequency of 24 MHz, achievable within a supply voltage range of 3.0 V to 5.5 V. At 16 MHz, it operates down to 2.95 V per Figure 11 in the datasheet; full 24 MHz operation requires ≥4.5 V supply. The internal 16 MHz RC oscillator is factory-trimmed to ±1% accuracy across temperature and voltage.
Does the STM8AF5289TCY include hardware support for LIN communication, and if so, which LIN protocol versions are supported?
Yes, the STM8AF5289TCY integrates a LINUART peripheral compliant with LIN 2.2 specification in both master and slave modes. It supports automatic baud rate resynchronization, checksum handling (classic and enhanced), and frame timeout detection - all implemented in hardware without CPU intervention during normal operation.
How is the CAN interface implemented, and what are its key timing and filtering capabilities?
The STM8AF5289TCY features a fully integrated CAN 2.0B controller (beCAN) supporting both standard and extended identifiers. It provides 16 message objects with configurable acceptance filters, hardware FIFO buffering, and bit-rate programming from 10 kbit/s to 1 Mbit/s. Timing parameters meet ISO 11898-1 requirements with programmable sample point and synchronization jump width.
What debug and programming interfaces are available, and are external debug probes required?
The device uses the Single Wire Interface Module (SWIM) for programming and debugging - a 1-pin, low-overhead interface supporting full flash/RAM access, breakpoints, and live register inspection. No external debug probe is required beyond a SWIM-capable programmer (e.g., ST-LINK/V2-1); no JTAG or SWD pins are needed, simplifying PCB layout and reducing pin count.
STM8AF5289TCY 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:
- 64KB (64K 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF5289TCY FAQ
1.How can I place an order for STM8AF5289TCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF5289TCY 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 STM8AF5289TCY reliable?
The price and inventory of STM8AF5289TCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF5289TCY is usually 5 days.
3.What payment methods are accepted for STM8AF5289TCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF5289TCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF5289TCY?
STM8AF5289TCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF5289TCY 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 STM8AF5289TCY?
For technical support, including STM8AF5289TCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF5289TCY requirements.
6.How does Aetrix verify that STM8AF5289TCY is sourced from the original manufacturer or authorized distributors?
All STM8AF5289TCY 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 STM8AF5289TCY meets industry standards.
7.What is the process for return or replacement of STM8AF5289TCY?
All STM8AF5289TCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF5289TCY, 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 STM8AF5289TCY part is unused and in its original packaging.
Return procedure for STM8AF5289TCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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