My Inquiry
My Account
STMicroelectronics STM8AF5289TCX
- Part No.:
- STM8AF5289TCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM8AF5289TCX.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,663
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM8AF5289TCX from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit MCU 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 STM8AF5289TCX datasheet, STM8AF5289TCX pinout, STM8AF5289TCX application, or STM8AF5289TCX equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and power specifications, and confirmed alternative options for CAN-enabled ECU designs.
Technical Context
The STM8AF5289TCX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, achieving 10 MIPS at 16 MHz. Its clock system integrates trimmable 16 MHz HSI and 128 kHz LSI oscillators plus external crystal support, all monitored by a dedicated clock security system (CSS) with failover detection.
It integrates dual 16-bit general-purpose timers (each with up to 3 CAPCOM channels), an advanced control timer with dead-time insertion and 3 complementary outputs, and a 10-bit ADC with ±2 LSB total unadjusted error across up to 16 multiplexed inputs - all operating reliably from −40 °C to +150 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic 1.6-cycle avg. instruction execution for hard real-time control loops. |
| Max fCPU | 24 MHz; supports time-critical CAN message handling and ADC sampling at full rate without CPU bottleneck. |
| Flash Memory | 128 Kbyte Flash with 20-year data retention at 55 °C; sufficient for complex automotive firmware with field-upgrade capability. |
| Data EEPROM | 2 Kbyte true data EEPROM rated for 300 kcycles; stores calibration parameters and fault logs with guaranteed endurance over vehicle lifetime. |
| CAN Interface | CAN 2.0B compliant, 1 Mbit/s data rate; meets ISO 11898-1 for robust communication in high-noise powertrain networks. |
| ADC Resolution | 10-bit with ±2 LSB TUE and 1 LSB linearity; provides accurate analog sensing of throttle position, coolant temperature, and oxygen sensors. |
| Operating Temp | −40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood engine control applications. |
Pinout & Package
LQFP80 package: 80-pin, 14 × 14 mm low-profile quad flat package with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD pins (pins 1, 79) and multiple VSS (pins 2, 3, 40, 41, 78) ensure stable core and I/O rail decoupling for EMC resilience. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external watchdog reset and power-on reset sequencing per ISO 26262 ASIL-B requirements. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7, PG0–PG7, PH0–PH7 | General-purpose I/O ports | 68 user-configurable pins including 11 high-sink I/Os (20 mA); immune to current injection per ISO 10605 for harsh automotive environments. |
| CAN_RX / CAN_TX | CAN physical layer interface | Dedicated differential pair (pins 57/58) with internal termination support; connects directly to CAN transceiver (e.g., TJA1042) without external components. |
| OSC_IN / OSC_OUT | External crystal oscillator connection | Supports 4–24 MHz crystal (pin 13/14); enables precise timing for LIN/CAN synchronization and ADC sampling clocks. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Control Timer (TIM1) | 16-bit with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - enables precise 3-phase motor gate drive in electric power steering. |
| LINUART Module | LIN 2.2-compliant master/slave with automatic resynchronization - eliminates need for external LIN transceiver in body control modules. |
| SWIM Debug Interface | Single-wire in-circuit debugging with non-intrusive real-time variable monitoring - reduces debug footprint and preserves PCB space in compact ECUs. |
| Low-Power Modes | Wait, Auto-Wakeup, and Halt modes with configurable clock gating - achieves sub-1 µA standby current for battery-sensitive telematics nodes. |
| Flash Security | Read-out protection (ROP), write protection (WP), and user boot code (UBC) locking - prevents firmware reverse engineering and unauthorized reprogramming. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
|
Use Scenario: Real-time processing of crankshaft/camshaft position signals, fuel injection timing, and spark advance calculation. IC Role / Device Role / Timing Role: Primary controller executing closed-loop combustion control at ≤2 ms cycle time with deterministic interrupt latency. Use Value: 24 MHz fCPU and nested 32-vector interrupt controller guarantee sub-500 ns response to critical crank sensor edges. |
Use Scenario: Gear selection logic, solenoid driver coordination, and torque converter clutch control in automatic transmissions. IC Role / Device Role / Timing Role: Safety-critical actuator manager interfacing with CAN bus for shift commands and feedback from hydraulic pressure sensors. Use Value: AEC-Q100 Grade 0 qualification and 150 °C operation ensure reliability in high-temperature transmission oil environments. |
| Electric Power Steering (EPS) | Body Control Module (BCM) |
|
Use Scenario: Sensor fusion of torque, motor position, and vehicle speed to generate assist torque commands for brushless DC motor. IC Role / Device Role / Timing Role: Motor control unit generating PWM outputs with dead-time compensation via TIM1 advanced timer. Use Value: Integrated 10-bit ADC with 16-channel mux and ±2 LSB TUE enables accurate torque sensor reading without external signal conditioning. |
Use Scenario: Centralized management of door locks, lighting, wipers, and HVAC via LIN and CAN networks. IC Role / Device Role / Timing Role: Network gateway translating LIN slave messages to CAN frames while maintaining strict timing for wiper interval control. Use Value: Dual UARTs (USART + LINUART) allow concurrent LIN master and CAN slave operation without software overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive CAN microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF6289TCX | No CAN interface; retains identical Flash/EEPROM/RAM, 24 MHz core, and 150 °C rating. | Suitable only for LIN-only or SPI/I2C-based body electronics where CAN is not required. | Select when CAN is unnecessary and cost reduction is prioritized without sacrificing temperature or memory specs. |
| SPC560B50L5 | 32-bit Power Architecture core, 64 MHz, 512 KB Flash, ISO 26262 ASIL-B ready, but higher BOM cost and larger footprint. | Targeted at next-generation ASIL-B safety-critical systems requiring formal verification and multi-core lockstep. | Choose for new designs requiring functional safety certification beyond AEC-Q100, accepting higher complexity and cost. |
Compared with STM8AF6289TCX, the STM8AF5289TCX adds essential CAN 2.0B for powertrain networking at no penalty in temperature or memory; versus SPC560B50L5, it delivers proven, lower-cost AEC-Q100 compliance for established ECU architectures without ASIL-B mandates.
Availability
STM8AF5289TCX is available at Aetrix Electronics and suitable for engine control units, transmission control modules, electric power steering systems, and body control modules requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF5289TCX 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 automotive MCU product line targets cost-sensitive, high-reliability engine and chassis control applications, emphasizing AEC-Q100 qualification, extended temperature operation, and integrated peripherals to reduce system-level BOM count.
FAQ
What is the maximum operating junction temperature for STM8AF5289TCX?
The device is qualified for ambient operation from −40 °C to +150 °C per AEC-Q100 Grade 0. With θJA = 27.5 °C/W (LQFP80, 4-layer board), max junction temperature reaches 165 °C at 150 °C ambient and 550 mW dissipation - verified in thermal characterization tests per Table 54 of DocID14395 Rev 15.
Does STM8AF5289TCX support hardware CRC calculation?
No. The STM8AF5289TCX does not include a dedicated hardware CRC peripheral. CRC-16 or CRC-32 must be implemented in firmware using the built-in 16-bit arithmetic unit and optimized assembly routines - reference AN4402 for implementation guidance on STM8A devices.
Can the internal 16 MHz RC oscillator be used as the system clock source for CAN operation?
Yes, but with limitations. The trimmed 16 MHz HSI meets CAN bit timing accuracy requirements only when calibrated against an external reference (e.g., crystal or LIN sync pulse). Datasheet Section 5.5.2 specifies ±2% tolerance post-trim, which satisfies ISO 11898-1 for nominal 500 kbit/s operation but not full 1 Mbit/s without additional synchronization.
Is there a migration path from STM8AF5289TCX to a 32-bit automotive MCU?
ST offers the SPC56EL60L5 (32-bit Power Architecture, AEC-Q100 Grade 1, 64 MHz, CAN FD) as a direct migration candidate. It shares identical LQFP80 packaging, CAN/LIN/ADC peripheral naming conventions, and STM32-style HAL abstraction layers - enabling reuse of driver logic and middleware with minimal porting effort.
STM8AF5289TCX 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:
- 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:
STM8AF5289TCX FAQ
1.How can I place an order for STM8AF5289TCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF5289TCX 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 STM8AF5289TCX reliable?
The price and inventory of STM8AF5289TCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF5289TCX is usually 5 days.
3.What payment methods are accepted for STM8AF5289TCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF5289TCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF5289TCX?
STM8AF5289TCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF5289TCX 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 STM8AF5289TCX?
For technical support, including STM8AF5289TCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF5289TCX requirements.
6.How does Aetrix verify that STM8AF5289TCX is sourced from the original manufacturer or authorized distributors?
All STM8AF5289TCX 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 STM8AF5289TCX meets industry standards.
7.What is the process for return or replacement of STM8AF5289TCX?
All STM8AF5289TCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF5289TCX, 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 STM8AF5289TCX part is unused and in its original packaging.
Return procedure for STM8AF5289TCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8AF5289TCX Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
