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STMicroelectronics STM8AF5289TAY
- Part No.:
- STM8AF5289TAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM8AF5289TAY.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,609
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Product details
Overview
STM8AF5289TAY 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 STM8AF5289TAY datasheet, STM8AF5289TAY pinout, STM8AF5289TAY application, or STM8AF5289TAY equivalent, this page delivers verified technical context, validated pin functions, automotive-grade thermal and EMC specifications, and direct substitution guidance for CAN-enabled powertrain and body electronics designs.
Technical Context
The STM8AF5289TAY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, enabling 10 MIPS at 16 MHz. It integrates dual clock domains: a user-trimmable 16 MHz internal RC oscillator and a 24 MHz external crystal oscillator, both monitored by a dedicated clock security system (CSS) with automatic failover to safe mode.
Its peripheral set includes a 10-bit ADC with ±2 LSB total unadjusted error and 1 LSB linearity across up to 16 channels, two 16-bit general-purpose timers with CAPCOM functionality, and an advanced control timer supporting dead-time insertion and complementary PWM outputs - all synchronized under a unified clock gating architecture for deterministic low-power operation down to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic 10 MIPS @ 16 MHz for hard real-time automotive control loops. |
| Flash Memory | 128 Kbyte on-chip Flash with 20-year data retention at 55 °C; supports in-system programming and read-out protection (ROP). |
| Data EEPROM | 2 Kbyte true data EEPROM with 300 kcycle endurance; retains calibration data and fault logs without external backup. |
| CAN Interface | CAN 2.0B compliant up to 1 Mbit/s; integrated bus timing, error handling, and message filtering for robust vehicle network communication. |
| ADC Resolution | 10-bit SAR ADC with ±2 LSB TUE and 1 LSB integral nonlinearity; supports precise analog sensor readings (e.g., throttle position, coolant temp). |
| Operating Temp | -40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0, enabling placement in high-heat zones like engine compartments. |
| Supply Voltage | 3.0 V to 5.5 V; accommodates wide automotive battery voltage range including cold-crank (down to 3 V) and load-dump transients. |
Pinout & Package
LQFP80 package: 80-pin, 14 × 14 mm, 0.65 mm pitch, thermally enhanced for automotive under-hood applications. Pin count and layout support full CAN, LIN, USART, SPI, I²C, and 16-channel ADC routing with dedicated VCAP and multiple ground pins for noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dedicated analog/digital power rails with separate VCAP decoupling pin for stable core voltage regulation. |
| PX0–PX7 (X = A–H) | General-purpose I/O | Up to 68 user-configurable pins; 11 support high-sink capability (20 mA) for direct LED/relay drive without external drivers. |
| PD0/PD1 | CAN TX/RX | Differential CAN bus interface with integrated transceiver-level signaling; supports ISO 11898-2 physical layer compliance. |
| PA0–PA7 | ADC input channels | 16 multiplexed analog inputs with programmable sampling time; share pins with GPIO and timer capture/compare functions. |
| PC0–PC7 | LINUART / USART | Shared LIN master/slave and UART functionality with automatic resynchronization; supports LIN 2.2 protocol stack implementation. |
| NRST | Active-low reset | Asynchronous reset input with internal pull-up; supports external watchdog reset injection and brown-out detection integration. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for continuous operation at 150 °C junction temperature - suitable for engine control, transmission, and exhaust aftertreatment systems. |
| Integrated CAN 2.0B controller | Hardware message buffering, ID filtering, and error confinement eliminate software overhead for real-time CAN frame processing. |
| True data EEPROM | 2 Kbyte nonvolatile memory with guaranteed 300 kwrite cycles - stores adaptive learning parameters and diagnostic trouble codes (DTCs) without wear leveling firmware. |
| 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 driving. |
| Low-power modes with clock gating | Wait, Auto-wakeup, Halt, and Active-halt modes; peripheral clocks individually gated to reduce current draw below 1 µA in Halt mode. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
|
Use Scenario: Real-time acquisition of crankshaft position, camshaft timing, and manifold pressure signals; closed-loop fuel injection and ignition timing calculation. IC Role / Device Role / Timing Role: Primary MCU executing deterministic control algorithms with sub-microsecond interrupt latency and synchronized PWM output for injector drivers. Use Value: 10-bit ADC with 1 LSB linearity ensures <±1° crank angle resolution; CAN interface enables seamless communication with dashboard and OBD-II diagnostics. |
Use Scenario: Monitoring gear selector position, turbine speed, and hydraulic pressure; managing solenoid valve sequencing and torque converter lockup. IC Role / Device Role / Timing Role: Central controller coordinating actuator timing via advanced PWM with dead-time insertion to prevent shoot-through in valve driver circuits. Use Value: 150 °C operating range allows direct mounting on transmission housing; LINUART supports cost-effective communication with shift lever sensors. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
|
Use Scenario: Managing door lock actuators, window lift motors, interior lighting, and mirror positioning using PWM and discrete I/O. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slave nodes (e.g., seat modules) and local analog sensors (e.g., ambient light). Use Value: 68 I/O pins with high-sink capability drive loads directly; integrated EEPROM stores user preferences and configuration settings across power cycles. |
Use Scenario: Sampling torque sensor and motor phase currents; generating space-vector PWM for brushless assist motor control. IC Role / Device Role / Timing Role: Safety-critical controller implementing ASIL-B functional safety requirements via hardware watchdogs and clock monitoring. Use Value: Nested interrupt controller with 32 vectors ensures priority-based response to torque demand changes; CAN interface reports status to vehicle stability systems. |
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 |
|---|---|---|---|
| STM8AF6289TAY | No CAN interface; identical Flash/EEPROM/RAM and 150 °C rating; replaces CAN with additional SPI/I²C channels. | Suitable for LIN-only or isolated subsystems (e.g., HVAC control) where CAN bus connectivity is unnecessary. | Select when CAN is not required and board space or BOM cost optimization is prioritized over network integration. |
| Infineon XC886CLM-8F64L | 8051-compatible core; 64 Kbyte Flash, 6 Kbyte RAM, CAN 2.0B, but only rated to 125 °C (AEC-Q100 Grade 1). | Applicable in cabin or chassis modules where ambient temperature remains below 125 °C, such as central gateway or lighting controllers. | Choose for legacy 8051 toolchain compatibility and lower-cost production, accepting reduced thermal margin versus STM8AF5289TAY. |
Compared with STM8AF6289TAY, the STM8AF5289TAY adds essential CAN 2.0B for powertrain networking while maintaining identical memory, timing, and thermal specs; versus XC886CLM-8F64L, it delivers higher temperature resilience and superior ADC linearity for precision engine sensing.
Availability
STM8AF5289TAY 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 STM8AF5289TAY 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 STM8A product line targets cost-sensitive, high-reliability automotive applications - delivering AEC-Q100 qualified 8-bit MCUs with integrated CAN, LIN, and analog peripherals optimized for powertrain, chassis, and body electronics.
FAQ
What is the maximum operating frequency and corresponding supply voltage range?
The STM8AF5289TAY achieves a maximum CPU frequency of 24 MHz at VDD = 4.5–5.5 V. At lower supply voltages, the maximum fCPU scales linearly: 16 MHz is guaranteed from 3.0 V, and operation down to 3.0 V supports cold-crank conditions without reset. This relationship is documented in Figure 11 of the datasheet (DocID14395 Rev 15, p.62).
Does the device include hardware support for LIN communication?
Yes - the STM8AF5289TAY integrates a LINUART peripheral compliant with LIN 2.2 specification, supporting both master and slave modes with automatic resynchronization. It uses the same USART hardware block with added LIN-specific framing logic, eliminating need for external LIN transceivers in basic implementations.
How is flash memory protected against unauthorized access or corruption?
Three independent protection mechanisms are implemented: Read-out Protection (ROP) prevents external debugger access to Flash contents; Write Protection (WP) blocks programming/erasing of selected sectors; and User Boot Code (UBC) protection isolates boot loader memory from application code overwrite - all configurable via option bytes.
What packaging options are available for the STM8AF5289TAY?
The STM8AF5289TAY is exclusively offered in LQFP80 (14 × 14 mm, 0.65 mm pitch) per Table 1 and Section 11.1 of the datasheet. Unlike other variants in the STM8AF52xx family (e.g., STM8AF5286 in LQFP64), the '89' suffix denotes the 80-pin configuration required to route all CAN, LIN, ADC, and high-current I/O signals simultaneously.
STM8AF5289TAY 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF5289TAY FAQ
1.How can I place an order for STM8AF5289TAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF5289TAY 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 STM8AF5289TAY reliable?
The price and inventory of STM8AF5289TAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF5289TAY is usually 5 days.
3.What payment methods are accepted for STM8AF5289TAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF5289TAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF5289TAY?
STM8AF5289TAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF5289TAY 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 STM8AF5289TAY?
For technical support, including STM8AF5289TAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF5289TAY requirements.
6.How does Aetrix verify that STM8AF5289TAY is sourced from the original manufacturer or authorized distributors?
All STM8AF5289TAY 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 STM8AF5289TAY meets industry standards.
7.What is the process for return or replacement of STM8AF5289TAY?
All STM8AF5289TAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF5289TAY, 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 STM8AF5289TAY part is unused and in its original packaging.
Return procedure for STM8AF5289TAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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