{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S903F3M3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S903F3M3","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S903F3M3","factsUrl":"https://icboms.com/api/mcp/products/STM8S903F3M3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S series 8-bit MCU, STM8 core, 16MHz, 8KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, 20-SOIC package, -40°C to 125°C.","salesMarkdown":"## What this 8-bit MCU delivers The STM8S903F3M3 is an 8-bit MCU from STMicroelectronics built around the STM8 core, clocked at 16 MHz. It carries 8 KB of Flash program memory, 1 KB of RAM, and 640 bytes of EEPROM — enough for a single control loop, sensor interface, or simple communication bridge in an embedded system. ## Peripheral set and I/O Sixteen I/O lines are available on the 20-pin SOIC package, plus a 5-channel 10-bit ADC for analog inputs. ## Supply and oscillator The STM8S903F3M3 is designated end-of-life hot (EOL hot). It is no longer recommended for new designs.","metaTitle":"ST STM8S903F3M3 8-bit MCU, 16MHz, 8KB Flash, SOIC-20","metaDescription":"STM8S903F3M3 8-bit MCU, 16 MHz core, 8 KB Flash, 1 KB RAM, 640 B EEPROM, -40 to 125°C. Sourced to order against RFQ.","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":"Tube","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/99a7192c520a3283640c68821053efb2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S903F3M3/alternatives.json"},"ai":{"faq":[{"question":"What is STM8S903F3M3's listed speed?","answer":"The core runs at 16 MHz, which is typical for an 8-bit MCU handling sensor polling, communication protocols, or simple control loops without heavy number-crunching."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S903F3M3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S903F3M3 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}}