{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S103F3M3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S103F3M3","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S103F3M3","factsUrl":"https://icboms.com/api/mcp/products/STM8S103F3M3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S103F3M3, STM8S series, 8-bit MCU, 16 MHz, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, 2.95V to 5.5V, 20-SOIC, -40°C to 125°C.","salesMarkdown":"## 8-bit MCU with 16 MHz core and industrial temperature range The STMicroelectronics STM8S103F3M3 is an 8-bit microcontroller from the STM8S family, built around the STM8 core and clocked at 16 MHz. ## Memory budget and peripheral fit With 8 KB of Flash and 1 KB of RAM, the firmware image needs to be lean — think bootloader plus one application task rather than a full RTOS. The 640-byte EEPROM is useful for calibration constants or fault logs that survive a power cycle. The 16 available I/O lines (20-SOIC package) and the 5-channel 10-bit ADC cover most sensor-read and switch-debounce tasks without a port expander.","metaTitle":"ST STM8S103F3M3 8-bit MCU, 16 MHz, 8 KB Flash","metaDescription":"STMicroelectronics STM8S103F3M3 8-bit MCU in 20-SOIC. 16 MHz core, 8 KB Flash, 1 KB RAM, 640 B EEPROM. Industrial temp range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"16MHz","Series":"STM8S","Package":"Tray","RAM Size":"1K x 8","Core Size":"8-Bit","EEPROM Size":"640 x 8","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"16","Core Processor":"STM8","Package / Case":"20-SOIC (0.295\\\", 7.50mm Width)","Product Status":"Active","Data Converters":"A/D 5x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM8","Program Memory Size":"8KB (8K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"20-SO","Voltage - Supply (Vcc/Vdd)":"2.95V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.2915","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3674b3c362c7ea11e333a829b5df608a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S103F3M3/alternatives.json"},"ai":{"faq":[{"question":"Can STM8S103F3M3 replace STM8S103F2?","answer":"The STM8S103F3M3 is a higher-density variant within the same STM8S103 value line. It offers 8 KB Flash versus the F2's 4 KB, but shares the same 20-SOIC footprint, pinout, and peripheral set. A direct replacement is possible if the firmware fits the larger Flash — no board respin needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S103F3M3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S103F3M3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}