{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S903K3T3CTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S903K3T3CTR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S903K3T3CTR","factsUrl":"https://icboms.com/api/mcp/products/STM8S903K3T3CTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S series, STM8S903K3T3CTR 8-bit MCU, 16 MHz, 8KB (8K x 8) FLASH, 1K x 8 RAM, 640 x 8 EEPROM, 2.95V ~ 5.5V, -40°C ~ 125°C, 32-LQFP (7x7).","salesMarkdown":"The STMicroelectronics STM8S903K3T3CTR is an 8-bit MCU from the STM8S value line, built around the STM8 core running at 16 MHz. It carries 8 KB of Flash program memory, 1K x 8 RAM, and 640 x 8 EEPROM — enough for sensor fusion, actuator sequencing, or LIN node firmware in automotive body electronics and industrial control. ## 8 KB Flash, 640-byte EEPROM — sizing the firmware budget The 8 KB Flash and 640 x 8 EEPROM set the firmware ceiling. The Flash holds the application code; the EEPROM stores calibration constants, fault logs, or configuration parameters that survive power cycles without wear-leveling overhead. For a LIN slave node running a state machine and ADC sampling loop, 8 KB is comfortable. If the firmware grows beyond that — say, adding a bootloader plus OTA staging — the next density step in the STM8S family uses the same 32-LQFP footprint. For a procurement review, that means no last-time-buy pressure and no forced requalification.","metaTitle":"STM8S903K3T3CTR STMicroelectronics 8-bit MCU, 16 MHz","metaDescription":"STMicroelectronics STM8S903K3T3CTR 8-bit MCU: 16 MHz core, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, -40 to 125°C, 2.95-5.5V. Active lifecycle.","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-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":"$2.8200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/99a7192c520a3283640c68821053efb2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S903K3T3CTR/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between STM8S903K3T3CTR and STM8S903K3T3C?","answer":"The suffix difference is the packaging and shipping medium. The STM8S903K3T3C is the tray or tube variant. The silicon, pinout, and specifications are identical."},{"question":"What are the alternatives to STM8S903K3T3CTR?","answer":"Within the STM8S family, pin-compatible density upgrades use the same 32-LQFP footprint and share the peripheral set. For a second-source discussion or cross-reference to a different architecture, submit an RFQ with your firmware size and I/O requirements."},{"question":"How to program STM8S903K3T3CTR with ST-Link?","answer":"The STM8S903K3T3CTR uses the SWIM (Single Wire Interface Module) debug protocol, not SWD. An ST-Link programmer with SWIM support connects to the SWIM pin and resets the MCU. The STVD or STVP toolchain handles the programming sequence."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S903K3T3CTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S903K3T3CTR 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}}