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STMicroelectronics STM8S103F3P6 — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM8S103F3P6 8-bit MCU, 16 MHz, 8 KB Flash, 20-TSSOP

MPNSTM8S103F3P6
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STMicroelectronics STM8S103F3P6, STM8S series 8-bit MCU, 16 MHz, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, 20-TSSOP, -40 to 85 °C, 2.95 to 5.5 V.

$1.9100Ref. price · indicative, final on quote
STMicroelectronics STM8S103F3P6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8S103F3P6 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-TSSOP (0.173\", 4.40mm Width)
Data convertersA/D 5x10b
Program memory size8KB (8K x 8)

Product details

At 16 MHz, the STM8 pipeline delivers roughly 16 MIPS. That is enough to run a PID loop at a few kHz, poll a UART, or toggle a GPIO at the bus rate.

Memory sizing: 8 KB Flash, 1 KB RAM, 640 B EEPROM

The 8 KB Flash (8K x 8) holds firmware for a single-purpose application — a Modbus RTU slave, a PWM fan controller, or a keypad scanner. The 1 KB RAM is enough for a few dozen variables and a small stack. The 640-byte EEPROM stores calibration constants or configuration parameters that survive a power cycle. Plan your memory map.

The 20-TSSOP package is surface-mount, so plan for reflow soldering and a conformal coat if condensation is expected.

Frequently asked questions

What is STM8S103F3P6's listed speed?

The listed core speed is 16 MHz.

What is STM8S103F3P6's listed series?

The listed series is STM8S.