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STMicroelectronics STM8S103F3M6 — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM8S103F3M6 8-bit MCU, 16 MHz, 8 KB Flash, 20-SOIC

MPNSTM8S103F3M6
Active

STMicroelectronics STM8S series 8-bit MCU, STM8S103F3M6, 16 MHz core, 8 KB Flash, 1 KB RAM, 640 B EEPROM, 16 I/O, 5x10-bit ADC, 2.95-5.5 V supply, -40 to 85°C, 20-SOIC package.

$2.1800Ref. price · indicative, final on quote
STMicroelectronics STM8S103F3M6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8S103F3M6 specifications
ParameterValue
SeriesSTM8S
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.95V ~ 5.5V
Operating temperature-40°C ~ 85°C (TA)
Speed16MHz
PackageTube
RAM size1K x 8
Core size8-Bit
EEPROM size640 x 8
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)16
Core processorSTM8
Case20-SOIC (0.295\", 7.50mm Width)
Data convertersA/D 5x10b
Program memory size8KB (8K x 8)

Product details

What this 8-bit MCU brings to the board

Peripherals and connectivity

On-chip peripherals include brown-out detect, POR, PWM, and a watchdog timer — the usual set for reliable standalone operation. Communication interfaces cover I²C, SPI, UART/USART, IrDA, and LINbus, which means this part can talk to serial sensors, displays, and motor drives without an external protocol bridge.

Lifecycle and sourcing

The STM8S103F3M6 is listed as active in production. It is available through independent distribution and can be quoted to order against an RFQ.

Frequently asked questions

What is STM8S103F3M6's core speed?

The STM8S103F3M6 runs at 16 MHz, which is the maximum clock for the STM8 core in this device.

What is the closest pin-compatible alternative to STM8S103F3M6?

Other STM8S103 devices in the same 20-SOIC package and pinout — such as the STM8S103F3P6 (TSSOP-20) — share the same core and peripheral set but differ in package. For a drop-in replacement, look for STM8S103Fx parts with the same 20-SO footprint.