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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM8S
Packaging Tube |
Core Processor STM8
Core Size 8-Bit
Speed 16MHz
Connectivity I2C, IrDA, LINbus, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 16
Program Memory Size 8KB (8K x 8)
Program Memory Type FLASH
EEPROM Size 640 x 8
RAM Size 1K x 8
Voltage - Supply (Vcc/Vdd) 2.95V ~ 5.5V
Data Converters A/D 5x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 20-SO
Package / Case 20-SOIC (0.295", 7.50mm Width)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM8S103F3M6 from STMicroelectronics is an 8-bit microcontroller built on the STM8 core. It runs at up to 16MHz and provides 8KB of flash memory plus 1KB of RAM. The device operates from 2.95V to 5.5V and includes essential safety features like brown-out reset, power-on reset, and a watchdog timer. Housed in a 20-pin SOIC package, it suits space-constrained industrial and consumer applications.

  • High-speed 16MHz core: Enables fast response in real-time control loops compared to lower-clocked 8-bit MCUs.
  • Wide voltage range (2.95V-5.5V): Simplifies power supply design and supports both 3.3V and 5V logic.
  • Integrated WDT and BOR: Enhances system reliability by preventing code runaway and managing brown-out conditions.
  • Compact 20-SOIC package: Reduces PCB area while providing enough I/O for basic control tasks.

Industrial Control

Use the STM8S103F3M6 in relay or solenoid controllers. Its 16MHz core and PWM outputs handle timing-critical switching with low latency.

Sensor Signal Conditioning

With 8KB flash and 1KB RAM, it can process analog sensor data and output calibrated results via UART or I2C in compact designs.

Power Management

The wide 2.95V-5.5V supply range and brown-out reset ensure reliable operation in battery-powered or regulated power systems.

Automotive Aftermarket

Its -40°C to 85°C temperature range and robust WDT make it suitable for non-critical automotive modules like window lift controllers.

Consumer Appliances

Use it in washing machine timers or microwave control panels. The 20-SOIC package is easy to solder in low-cost PCB assemblies.

Lighting Control

Generate dimming signals with the PWM peripheral while the WDT prevents lockups in LED driver circuits.

Q: What is the operating voltage range of the STM8S103F3M6?
A: It operates from 2.95V to 5.5V, making it suitable for 3.3V and 5V systems.
Q: How much flash memory does this MCU have?
A: It has 8KB of program flash memory and 1KB of RAM.
Q: What package is the STM8S103F3M6 available in?
A: It comes in a 20-pin SOIC package with a 7.50mm body width.
Q: Does it include a watchdog timer?
A: Yes, it features a WDT along with brown-out reset and POR.
Base Product Number : STM8S103F3M6
16MHz 1KB RAM 8-bit MCU 8KB flash consumer appliances industrial control PWM SOIC-20 STM8 STM8 core WDT
Q: What is the operating voltage range of the STM8S103F3M6?
A: It operates from 2.95V to 5.5V, making it suitable for 3.3V and 5V systems.
Q: How much flash memory does this MCU have?
A: It has 8KB of program flash memory and 1KB of RAM.
Q: What package is the STM8S103F3M6 available in?
A: It comes in a 20-pin SOIC package with a 7.50mm body width.
Q: Does it include a watchdog timer?
A: Yes, it features a WDT along with brown-out reset and POR.