{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S103K3T6CTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S103K3T6CTR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S103K3T6CTR","factsUrl":"https://icboms.com/api/mcp/products/STM8S103K3T6CTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S103K3T6CTR, 8-bit STM8 core MCU, 16 MHz, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, 2.95 V to 5.5 V, 28 I/O, 32-LQFP, -40°C to 85°C.","salesMarkdown":"## What this 8-bit MCU brings to a control board At 16 MHz the STM8 core executes most instructions in one or two clock cycles, so the effective throughput is closer to 16 MIPS for simple register-to-register moves. That is enough headroom for a 10 kHz PID loop with sensor read and PWM update, or for bit-banging a custom serial protocol at 1 Mbps. The internal oscillator trims to ±1% accuracy over temperature, which saves an external crystal in non-critical timing applications. ## Memory sizing for firmware and data logging 8 KB of Flash holds a moderate application — think a bootloader plus a state-machine control loop with a few hundred lines of C. The 1 KB SRAM limits buffering; a UART receive ring buffer of 256 bytes plus a 128-byte sensor data array leaves about 640 bytes for stack and variables. The 640 bytes of EEPROM are useful for calibration constants, node ID, or fault logs that survive power loss. If the firmware grows beyond 8 KB, look at the STM8S105 or STM8S207 family members with larger Flash and RAM. The 32-LQFP package (7x7 mm) is hand-solderable and inspectable, which helps during prototype rework or low-volume production. The wide supply range also helps ride through brown-out conditions common in industrial power rails. Listed as Active by STMicroelectronics, so there is no imminent EOL risk for new designs.","metaTitle":"STM8S103K3T6CTR 8-bit MCU, 16 MHz, 8 KB Flash, 32-LQFP","metaDescription":"STMicroelectronics STM8S103K3T6CTR 8-bit MCU: 16 MHz core, 8 KB Flash, 1 KB RAM, 640 B EEPROM, 2.95-5.5 V, -40 to 85°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":"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 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-LQFP (7x7)","Voltage - Supply (Vcc/Vdd)":"2.95V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.2500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3674b3c362c7ea11e333a829b5df608a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S103K3T6CTR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STM8S103K3T6CTR in this family?","answer":"Within the STM8S103 series, the K3 variant is the mid-density option. The STM8S103F3 (20-pin TSSOP) and STM8S103K3 (32-LQFP) share the same core and peripheral set but differ in pin count and package. For a drop-in 32-LQFP replacement with more memory, the STM8S105K6 offers 32 KB Flash and 2 KB RAM in the same footprint."},{"question":"Is STM8S103K3T6CTR RoHS compliant?","answer":"The T6 suffix in the order code indicates a RoHS-compliant, lead-free finish. The part is listed as RoHS compliant per ST's standard product declarations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S103K3T6CTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S103K3T6CTR 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}}