{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L051K8U3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L051K8U3","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L051K8U3","factsUrl":"https://icboms.com/api/mcp/products/STM32L051K8U3","rawCanonicalId":null},"summary":{"shortDescription":"ST STM32L0 series, ARM Cortex-M0+ 32-bit MCU, 32 MHz, 64 KB Flash, 8 KB RAM, 2 KB EEPROM, 1.65 V to 3.6 V, -40 to 125 °C, UFQFPN-32.","salesMarkdown":"## 32 MHz Cortex-M0+ in a 5×5 mm UFQFPN The STM32L051K8U3 is a 32-bit ARM Cortex-M0+ MCU clocked at 32 MHz. It carries 64 KB Flash, 8 KB SRAM, and 2 KB EEPROM, with a 1.65 V to 3.6 V supply range. Rated for -40 to 125 °C operating ambient. The 5×5 mm package with exposed pad aids thermal transfer to the PCB ground plane. ## Memory and peripherals for field-update readiness The 64 KB Flash is sized for a firmware image with a bootloader that supports in-application programming over UART or I²C. 8 KB of SRAM leaves room for moderate data buffering — enough for a small Modbus RTU slave or a sensor hub aggregating a few ADC channels. The 10-channel 12-bit ADC covers analog inputs without an external converter.","metaTitle":"ST STM32L051K8U3 ARM Cortex-M0+ MCU, 32 MHz, 64 KB Flash","metaDescription":"STMicroelectronics STM32L051K8U3 32-bit MCU, ARM Cortex-M0+ core at 32 MHz, 64 KB Flash, 8 KB RAM, 2 KB EEPROM, -40 to 125 °C, UFQFPN-32. Sourced to order; RFQ for current pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"32MHz","Series":"STM32L0","Package":"Tray","RAM Size":"8K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"2K x 8","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I2C, IrDA, 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 10x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L051","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"32-UFQFPN (5x5)","Voltage - Supply (Vcc/Vdd)":"1.65V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1976","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4480b8ddc40b685393082b7ee2561685.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L051K8U3/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STM32L051K8U3?","answer":"The STM32L052K8U6 is a pin-compatible upgrade within the same STM32L0 family, adding a DAC and a few extra features while keeping the same UFQFPN-32 footprint."},{"question":"What is the operating voltage of STM32L051K8U3?","answer":"The supply range is 1.65 V to 3.6 V, covering single Li-ion cell or 1.8 V logic rail operation."},{"question":"Is STM32L051K8U3 compatible with STM32L031K6?","answer":"The STM32L031K6 is a lower-density sibling (32 KB Flash, 8 KB RAM) in the same STM32L0 family and same UFQFPN-32 package, so it is pin-compatible for a cost-reduced or lower-memory BOM variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L051K8U3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L051K8U3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-11T18:12:59.411Z","lastPublished":"2026-07-11T18:12:59.411Z","indexable":true}}