{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S903K3T3C","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S903K3T3C","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S903K3T3C","factsUrl":"https://icboms.com/api/mcp/products/STM8S903K3T3C","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S903K3T3C, STM8S series 8-bit MCU, 16 MHz core, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, 2.95V-5.5V supply, -40°C to 125°C, 32-LQFP (7x7) surface mount.","salesMarkdown":"## 16 MHz 8-bit core with on-chip peripherals for compact control The STMicroelectronics STM8S903K3T3C is an 8-bit microcontroller from the STM8S value-line family, built around the STM8 core running at 16 MHz. It packs 8 KB of Flash program memory, 1K x 8 of RAM, and 640 x 8 of EEPROM — enough for sensor fusion, motor commutation logic, or simple HMI control loops without external storage. The internal oscillator trims the external crystal cost from the BOM. ## 28 I/Os in a 32-LQFP — what the pin count buys you With 28 I/O lines in a 32-LQFP (7x7 mm) package, this MCU leaves four pins for power and ground. That I/O count supports a row of pushbuttons plus an LED matrix, or a parallel interface to a character LCD, while keeping the board area under 50 mm². The surface-mount LQFP is hand-solderable with a fine-tip iron but benefits from a hot-air rework station for removal.","metaTitle":"ST STM8S903K3T3C 8-bit MCU, 16 MHz, 8 KB Flash, 32-LQFP","metaDescription":"STMicroelectronics STM8S903K3T3C 8-bit MCU: 16 MHz core, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, -40°C to 125°C, 2.95V-5.5V, 32-LQFP.","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":"28","Core Processor":"STM8","Package / Case":"32-LQFP","Product Status":"Active","Data Converters":"A/D 7x10b","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":"32-LQFP (7x7)","Voltage - Supply (Vcc/Vdd)":"2.95V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3346","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/99a7192c520a3283640c68821053efb2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S903K3T3C/alternatives.json"},"ai":{"faq":[{"question":"Is STM8S903K3T3C a 16 MHz microcontroller?","answer":"Yes — the STM8 core is rated for 16 MHz operation, which sets the instruction throughput ceiling for control loops and serial communication timing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S903K3T3C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S903K3T3C 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}}