{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S105K4U3ATR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S105K4U3ATR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S105K4U3ATR","factsUrl":"https://icboms.com/api/mcp/products/STM8S105K4U3ATR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S105K4U3ATR, 8-bit MCU, STM8S series, 16 MHz, 16 KB Flash, 2K x 8 RAM, 1K x 8 EEPROM, 25 I/O, I²C/SPI/UART, -40°C to 125°C, 32-UFQFPN (5x5).","salesMarkdown":"## 16 MHz 8-bit MCU with integrated EEPROM for industrial control The STMicroelectronics STM8S105K4U3ATR is an 8-bit microcontroller from the STM8S family, built around the STM8A core and clocked at 16 MHz. ## Memory and peripheral set for small-footprint control The 16 KB Flash is sized for modest firmware images — think motor commutation loops, sensor fusion, or communication protocol stacks. Peripherals include a brown-out reset, POR, PWM outputs, and a watchdog timer, covering the basics for reliable standalone operation. Without that via stitch, junction temperature rises quickly under continuous load at the high end of the temperature range. The pad also provides a low-inductance ground return for the I/O and ADC.","metaTitle":"STM8S105K4U3ATR 8-bit MCU, 16 MHz, 16 KB Flash","metaDescription":"STMicroelectronics STM8S105K4U3ATR 8-bit MCU, 16 MHz core, 16 KB Flash, 2 KB RAM, 1 KB EEPROM, -40°C to 125°C, 32-UFQFPN.","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)","RAM Size":"2K x 8","Core Size":"8-Bit","EEPROM Size":"1K 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":"25","Core Processor":"STM8A","Package / Case":"32-UFQFN Exposed Pad","Product Status":"Active","Data Converters":"A/D 7x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM8","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"32-UFQFPN (5x5)","Voltage - Supply (Vcc/Vdd)":"2.95V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3627","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/79a5231aeb7b67b40c4d895563a236b9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S105K4U3ATR/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between STM8S105K4U3ATR and STM8S105K4U3?","answer":"The 'ATR' suffix typically denotes tape-and-reel packaging and a specific temperature grade. Confirm the exact suffix against your BOM requirements."},{"question":"How to program STM8S105K4U3ATR?","answer":"Programming is done via the SWIM (Single Wire Interface Module) protocol, supported by ST's ST-Link debugger/programmer and third-party tools. The internal Flash is self-programmable, allowing in-application firmware updates."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S105K4U3ATR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S105K4U3ATR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:51:14.863Z","lastPublished":"2026-07-22T18:51:14.863Z","indexable":true}}