STMicroelectronics STM8AF5289TCY

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM8A
Packaging Tray |
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 AEC-Q100
Mounting Type Surface Mount
Supplier Device Package -
Package / Case 64-LQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM8AF5289TCY from STMicroelectronics is a robust 8-bit automotive MCU built on the STM8A core. It operates at up to 24MHz with 64KB flash and 6KB RAM. The device supports 3V to 5.5V supply and is rated for -40°C to 125°C, making it ideal for harsh environments. It includes brown-out reset, POR, PWM, and watchdog timer for reliable operation in safety-critical systems.

  • Extended temperature range (-40°C to 125°C) – ensures reliable operation in automotive and industrial environments.
  • Wide supply voltage (3V-5.5V) – simplifies power design and supports direct battery connection.
  • 64KB flash memory – ample space for complex firmware with OTA update capability.
  • Integrated watchdog and brown-out reset – enhances system safety and reduces external components.

Automotive Body Control Modules

The 3V-5.5V supply and 125°C rating allow direct connection to vehicle battery rails and operation under hood.

Industrial Sensor Interfaces

With 24MHz STM8A core and 6KB RAM, it can handle multiple analog sensor inputs with fast ADC sampling and PWM output for actuators.

Motor Control for Pumps and Fans

Integrated PWM and WDT ensure reliable commutation and fault recovery in brushless DC motor drives.

Smart Power Distribution Units

Brown-out detection and POR provide safe power-up sequencing for high-current switching applications.

Portable Diagnostic Tools

Low-power modes and wide voltage range enable battery-operated field devices with long service life.

Safety-Critical Lighting Systems

The 64KB flash allows storing multiple lighting profiles, while WDT prevents software lockups in emergency lighting.

Q: What is the operating voltage range of the STM8AF5289TCY?
A: The STM8AF5289TCY operates from 3V to 5.5V, making it suitable for automotive and industrial power rails.
Q: What is the maximum CPU speed?
A: The STM8A core runs at up to 24MHz, providing balanced performance for real-time control tasks.
Q: How much flash and RAM does it have?
A: It features 64KB of program flash and 6KB of RAM, adequate for mid-complexity embedded applications.
Q: What package is available?
A: It comes in a 64-pin LQFP package, suitable for compact PCB layouts.
Q: Does it include watchdog and reset features?
A: Yes, it has Brown-out Detect/Reset, POR, PWM, and WDT for robust operation.
Base Product Number : STM8AF5289
-40°C to 125°C 24MHz 64KB flash 6KB RAM 8-bit MCU automotive body control LQFP-64 motor control PWM STM8A WDT
Q: What is the operating voltage range of the STM8AF5289TCY?
A: The STM8AF5289TCY operates from 3V to 5.5V, making it suitable for automotive and industrial power rails.
Q: What is the maximum CPU speed?
A: The STM8A core runs at up to 24MHz, providing balanced performance for real-time control tasks.
Q: How much flash and RAM does it have?
A: It features 64KB of program flash and 6KB of RAM, adequate for mid-complexity embedded applications.
Q: What package is available?
A: It comes in a 64-pin LQFP package, suitable for compact PCB layouts.
Q: Does it include watchdog and reset features?
A: Yes, it has Brown-out Detect/Reset, POR, PWM, and WDT for robust operation.