{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S103K3T3C","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S103K3T3C","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S103K3T3C","factsUrl":"https://icboms.com/api/mcp/products/STM8S103K3T3C","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S103K3T3C, STM8S series 8-bit MCU, 16MHz, 8KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, 2.95V-5.5V, -40°C to 125°C, 32-LQFP, Tray.","salesMarkdown":"The STMicroelectronics STM8S103K3T3C is an 8-bit MCU from the STM8S series, built around the STM8 core and clocked at 16 MHz. ## Memory and peripheral fit for production firmware With 8 KB of Flash and 1 KB of RAM, firmware must stay lean — think state-machine control, Modbus slave, or a simple PID loop. The 640-byte EEPROM is handy for calibration constants or fault logs that survive power cycles. Four 10-bit ADC channels handle analog inputs like thermistors or potentiometers. The STM8S103K3T3C comes in a 32-LQFP package (7x7 mm body) with 28 usable I/O lines. Surface-mount only — no DIP option. The LQFP footprint is standard; no exotic pad geometry. If you are replacing a 32-pin QFP MCU on an existing board, check the pinout against the STM8S reference manual — the peripheral mapping differs from the STM8S003K3T6C in a few positions.","metaTitle":"ST STM8S103K3T3C 8-bit MCU, 16 MHz, 8 KB Flash, 32-LQFP","metaDescription":"STMicroelectronics STM8S103K3T3C 8-bit MCU, 16 MHz core, 8 KB Flash, 1 KB RAM, 640 B EEPROM, -40 to 125°C, 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":"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":"28","Core Processor":"STM8","Package / Case":"32-LQFP","Product Status":"Active","Data Converters":"A/D 4x10b","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":"$2.5900","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3674b3c362c7ea11e333a829b5df608a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S103K3T3C/alternatives.json"},"ai":{"faq":[{"question":"Can STM8S103K3T3C be used as a replacement for STM8S003K3T6C?","answer":"The STM8S103K3T3C and STM8S003K3T6C are from the same STM8S family and share the same core and memory footprint, but the pin assignments and peripheral mapping differ in a few positions. A direct drop-in replacement is not guaranteed — verify the pinout against your PCB layout before committing."},{"question":"What is the listed speed of STM8S103K3T3C?","answer":"The core runs at 16 MHz, which sets the timing budget for I/O toggling and peripheral throughput."},{"question":"What programmer or debugger is required for STM8S103K3T3C?","answer":"ST's SWIM (Single Wire Interface Module) protocol is used for programming and debugging. Any ST-LINK/V2 or later variant supports it — no separate debug probe needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S103K3T3C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S103K3T3C 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}}