{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32F051K4U6TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32F051K4U6TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32F051K4U6TR","factsUrl":"https://icboms.com/api/mcp/products/STM32F051K4U6TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32F0 series, STM32F051K4U6TR, 32-bit ARM Cortex-M0 MCU, 48 MHz, 16 KB Flash, 8K x 8 RAM, 27 I/O, 2V to 3.6V, -40°C to 85°C, 32-UFQFPN (5x5 mm).","salesMarkdown":"At 48 MHz the Cortex-M0 executes most single-cycle instructions, giving you a 20.8 ns instruction cycle. That is fast enough for 10 kHz current loops or 100 kHz sensor readouts with headroom for protocol overhead. The flash wait state needs to be set to 1 when running above 24 MHz, or the core hard-faults on the first branch — a common bring-up trap. 16 KB of Flash is tight for a full RTOS stack; bare-metal or a lightweight scheduler fits comfortably. The 8 KB RAM handles a couple of moderate-size buffers — plan for a 2 KB comms buffer and 1 KB for stack, leaving about 5 KB for application data. If your firmware needs OTA or a large lookup table, step up to the 32 KB or 64 KB Flash variants in the same package. ## Package and thermal pad — layout notes The 32-UFQFPN (5x5 mm) with exposed pad is a dense, low-profile package suited for space-constrained PCBs. The pad is also the only thermal path; the plastic body does little to dissipate heat. It is not qualified for under-hood automotive (no AEC-Q100) or extended 105°C/125°C environments. For those, look at the STM32F0 automotive-grade siblings.","metaTitle":"STM32F051K4U6TR ARM Cortex-M0 MCU, 48 MHz, 16 KB Flash","metaDescription":"STMicroelectronics STM32F051K4U6TR 32-bit ARM Cortex-M0 MCU, 48 MHz, 16 KB Flash, 8 KB RAM, 27 I/O, 32-UFQFPN, -40 to 85°C.","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) Cut Tape (CT)","RAM Size":"8K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"DMA, I²S, POR, PWM, WDT","Connectivity":"HDMI-CEC, 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; D/A 1x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32F051","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":"$1.7401","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5b8222026032a8f6c67417def25d2d17.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32F051K4U6TR/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32F051K4U6TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32F051K4U6TR 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}}