{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32F031K4U6TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32F031K4U6TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32F031K4U6TR","factsUrl":"https://icboms.com/api/mcp/products/STM32F031K4U6TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32F031K4U6TR, ARM Cortex-M0 32-bit MCU, 48 MHz, 16 KB Flash, 4 KB RAM, 27 I/O, 2 V to 3.6 V supply, -40°C to 85°C, 32-UFQFPN exposed pad.","salesMarkdown":"## What this Cortex-M0 MCU brings to a compact control design The 32-UFQFPN package with an exposed pad (5x5 mm footprint) keeps the board area tight and helps pull heat out of the die when the MCU drives several I/O simultaneously. It is not qualified for under-hood automotive (no AEC-Q100 in the record) or extended 105°C/125°C environments. STMicroelectronics lists the STM32F031K4U6TR as an active product. For new designs, this is a safe selection from a lifecycle standpoint — no LTB clock is ticking. ## What the 48 MHz core and 16 KB Flash mean for your BOM At 48 MHz the Cortex-M0 delivers about 0.9 DMIPS/MHz — enough for real-time control loops (e.g., sensor polling at 10 kHz, PID updates) without a cache or prefetch buffer. The 16 KB Flash limits firmware to lean, single-purpose applications; you will not fit a full RTOS with TCP/IP stack. Plan for a bare-metal scheduler or a lightweight event loop. The 4 KB RAM holds a few hundred bytes of stack and global data, so watch your buffer allocations.","metaTitle":"STM32F031K4U6TR ARM Cortex-M0 MCU, 48 MHz, 16 KB Flash","metaDescription":"STMicroelectronics STM32F031K4U6TR 32-bit MCU, ARM Cortex-M0 core at 48 MHz, 16 KB Flash, 4 KB RAM, 27 I/O, -40 to 85°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":"48MHz","Series":"STM32F0","Package":"Tape & Reel (TR)","RAM Size":"4K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"DMA, I²S, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"27","Core Processor":"ARM® Cortex®-M0","Package / Case":"32-UFQFN Exposed Pad","Product Status":"Active","Data Converters":"A/D 13x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32F031","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"32-UFQFPN (5x5)","Voltage - Supply (Vcc/Vdd)":"2V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6457","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7127f169a82fed95ea2bf9d385a9c5f9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32F031K4U6TR/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between STM32F031K4U6TR and STM32F031K6U6?","answer":"The primary difference is Flash memory density: the STM32F031K4U6TR has 16 KB of Flash, while the STM32F031K6U6 carries 32 KB. Both share the same Cortex-M0 core, 48 MHz clock, 4 KB RAM, 27 I/O, and 32-UFQFPN package. The K6 variant provides more code space for larger firmware images."},{"question":"Does STM32F031K4U6TR have USB?","answer":"No. The STM32F031K4U6TR does not include a USB peripheral. Its connectivity interfaces are I²C, IrDA, LINbus, SPI, and UART/USART."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32F031K4U6TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32F031K4U6TR 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}}