{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L072RBT3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L072RBT3","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L072RBT3","factsUrl":"https://icboms.com/api/mcp/products/STM32L072RBT3","rawCanonicalId":null},"summary":{"shortDescription":"ST STM32L0 series 32-bit ARM Cortex-M0+ MCU, STM32L072RBT3, 32MHz, 128KB Flash, 20K x 8 RAM, 6K x 8 EEPROM, 1.65V to 3.6V, -40°C to 125°C, 64-LQFP.","salesMarkdown":"It runs at 32MHz and packs 128KB of Flash program memory, 20K x 8 of RAM, and a separate 6K x 8 EEPROM block for data that survives power loss without wearing the Flash. The supply range from 1.65V to 3.6V means it keeps running off a single alkaline cell down to near-empty, which is the main reason you see this part in battery-operated sensor nodes, LPWAN endpoints, and portable instrumentation. The 125°C ceiling is the extended-temperature tier that commercial 85°C parts cannot touch — if your product sees engine-bay heat or direct sunlight in a sealed enclosure, this is the grade you need. ## Memory layout — why the separate EEPROM matters 128KB of Flash is enough for a moderate firmware image with a bootloader and application stack. The 20KB RAM handles RTOS tasks and data buffers. What sets this part apart from many Cortex-M0+ MCUs is the dedicated 6K x 8 EEPROM: you can store calibration constants, node IDs, or logged readings without wearing out the Flash array or needing a page-erase cycle. For a battery-powered sensor that writes configuration data daily over a ten-year service life, that EEPROM block is the difference between a reliable field return and a premature failure.","metaTitle":"ST STM32L072RBT3 ARM Cortex-M0+ MCU, 32MHz, 128KB Flash","metaDescription":"STMicroelectronics STM32L072RBT3 32-bit ARM Cortex-M0+ MCU, 32MHz, 128KB Flash, 20KB RAM, 6KB EEPROM, -40°C to 125°C, 64-LQFP.","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":"20K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"6K x 8","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I²C, IrDA, SPI, UART/USART, USB","Mounting Type":"Surface Mount","Number of I/O":"51","Core Processor":"ARM® Cortex®-M0+","Package / Case":"64-LQFP","Product Status":"Active","Data Converters":"A/D 16x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L072","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"64-LQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"1.65V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.4116","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/67cb9094f3e6522ca004c703798dd6eb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the core architecture of STM32L072RBT3?","answer":"It uses an ARM Cortex-M0+ core, which is a 32-bit single-core processor designed for low-power operation. The M0+ is the smallest and most energy-efficient ARM core, making this MCU a natural fit for battery-powered and energy-harvesting applications."},{"question":"What are the alternatives to STM32L072RBT3?","answer":"Within the STM32L0 family, the closest pin-compatible sibling is the STM32L072RBT6, which shares the same 64-LQFP footprint and peripheral set but uses a different temperature grade or package variant suffix. For a direct parametric match, the base product number STM32L072 covers the whole series — density and temperature options share the same pinout, so a swap between them is a BOM-line change, not a board respin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L072RBT3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L072RBT3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T12:36:08.631Z","lastPublished":"2026-07-16T12:36:08.631Z","indexable":true}}