{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S103K3U6TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S103K3U6TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S103K3U6TR","factsUrl":"https://icboms.com/api/mcp/products/STM8S103K3U6TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S103K3U6TR, 8-Bit STM8 core MCU, 16 MHz, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, 28 I/O, I²C/SPI/UART, 2.95 V to 5.5 V, -40°C to 85°C, 32-UFQFPN (5x5).","salesMarkdown":"## 8 KB Flash, 16 MHz — the BOM-fit tier It runs at 16 MHz and packs 8 KB of Flash program memory, 1 KB of SRAM, and 640 bytes of EEPROM — a memory footprint sized for cost-sensitive control applications like appliance panels, sensor interfaces, and motor-control nodes where a 32-bit ARM core would be overkill and the BOM needs to stay under a dollar fifty. ## 16 MHz — timing budget for UART and PWM At 16 MHz the core clock gives a 62.5 ns instruction cycle time. That is fast enough to bit-bang a 115200 baud UART with margin, or generate a 16-bit PWM at 244 Hz resolution. For a 1 MHz PWM output the timer prescaler drops the effective resolution to 16 steps — fine for fan speed or LED dimming, not for servo-loop precision. If you need finer PWM granularity at higher frequencies, step up to the STM8S105 or STM8S207 family with a 24 MHz core. ## 32-UFQFPN — footprint and thermal The 32-UFQFPN (5x5 mm) package with exposed pad is the only mechanical option for this order code. The 0.5 mm pitch means a standard 0.3 mm stencil aperture works; no micro-BGA rework needed. STMicroelectronics lists the STM8S103K3U6TR as an active product. There is no last-time-buy notice and no announced end-of-life. For new designs this means you can commit the BOM line without a near-term obsolescence watch. The STM8S103K3 is a popular density point in the STM8S family, so second-source availability through independent distribution is robust — we source and quote it against an RFQ through our multi-supplier channel.","metaTitle":"STM8S103K3U6TR 8-bit MCU, 16 MHz, 8 KB Flash, 32-UFQFPN","metaDescription":"STMicroelectronics STM8S103K3U6TR 8-bit MCU with 16 MHz core, 8 KB Flash, 1 KB RAM, 640 B EEPROM.","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":"Tape & Reel (TR) Cut Tape (CT)","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-UFQFN Exposed Pad","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 ~ 85°C (TA)","Supplier Device Package":"32-UFQFPN (5x5)","Voltage - Supply (Vcc/Vdd)":"2.95V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3674b3c362c7ea11e333a829b5df608a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S103K3U6TR/alternatives.json"},"ai":{"faq":[{"question":"What is the flash memory size of STM8S103K3U6TR?","answer":"The STM8S103K3U6TR has 8 KB of Flash program memory (8K x 8), plus 1 KB of SRAM and 640 bytes of EEPROM."},{"question":"Is STM8S103K3U6TR obsolete?","answer":"No — STMicroelectronics lists this part as active."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S103K3U6TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S103K3U6TR 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}}