{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8S103F2U6TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8S103F2U6TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8S103F2U6TR","factsUrl":"https://icboms.com/api/mcp/products/STM8S103F2U6TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8S103F2U6TR, 8-bit STM8 core MCU, 16 MHz, 4 KB Flash, 1 KB RAM, 640 B EEPROM, 16 I/O, 20-UFQFN, -40 to 85°C.","salesMarkdown":"## 16 MHz 8-bit MCU with 4 KB Flash — entry-level control for cost-sensitive boards It packs 4 KB of Flash program memory, 1 KB of RAM, and 640 bytes of EEPROM — enough for small control loops, sensor polling, and simple communication stacks. The 20-UFQFN package keeps board area tight, and the wide supply range from 2.95 V to 5.5 V lets it run off an unregulated battery or a 3.3 V / 5 V rail without an extra regulator. This is a value-line part meant for high-volume, cost-sensitive applications like appliance controllers, industrial sensor interfaces, and basic motor commutation. With 4 KB of Flash and 1 KB of RAM, the firmware footprint is the first constraint a designer hits. This part suits a single-purpose control task — a fan speed controller, a thermostat, a keypad scanner — where the code compiles under 3.5 KB and the data buffers fit in the remaining RAM. The 640 bytes of EEPROM give non-volatile storage for calibration constants or configuration parameters without wearing the Flash. The 16 I/O pins in the 20-UFQFN package are enough for a handful of sensor inputs, a few relay or LED outputs, and a serial bus. The 5-channel 10-bit ADC handles analog inputs like a potentiometer or a thermistor directly. ## 20-UFQFN — rework and layout notes Orientation is marked by a chamfered corner — find pin 1 before placing, because a misaligned UFQFN is a pain to lift without lifting the pad. The brown-out detect and POR circuits keep the core from running into undefined states during a cold-crank or a brown-out event.","metaTitle":"ST STM8S103F2U6TR 8-bit MCU, 16 MHz, 4 KB Flash, 20-UFQFN","metaDescription":"STMicroelectronics STM8S103F2U6TR 8-bit MCU, 16 MHz core, 4 KB Flash, 1 KB RAM, 640 B EEPROM, 20-UFQFN, -40 to 85°C. 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":"16","Core Processor":"STM8","Package / Case":"20-UFQFN","Product Status":"Active","Data Converters":"A/D 5x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM8","Program Memory Size":"4KB (4K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Voltage - Supply (Vcc/Vdd)":"2.95V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3674b3c362c7ea11e333a829b5df608a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8S103F2U6TR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STM8S103F2U6TR?","answer":"The STM8S003F3 is a commonly cross-shopped alternative in the same STM8S family. Both share the 20-pin UFQFN footprint and the same peripheral set, but the STM8S003F3 offers 8 KB of Flash versus the 4 KB on the STM8S103F2U6TR, which matters if your firmware needs more code space. Pin compatibility holds across the STM8S value-line density options, so a board can be designed for the larger Flash variant and populated with the smaller one if the code fits."},{"question":"What is STM8S103F2U6TR's listed speed?","answer":"The core runs at 16 MHz. That is the maximum clock from the internal oscillator, so no external crystal is needed for the full-speed operation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8S103F2U6TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8S103F2U6TR 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}}