{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L031G4U6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L031G4U6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L031G4U6","factsUrl":"https://icboms.com/api/mcp/products/STM32L031G4U6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L031G4U6, ARM Cortex-M0+ 32-bit MCU, 32 MHz, 16 KB Flash, 8 KB RAM, 1 KB EEPROM, 1.8V–3.6V, -40°C to 85°C, 28-UFQFPN.","salesMarkdown":"## Memory budget and peripheral set With 8 KB of RAM and 16 KB of Flash, the firmware footprint is tight — this part is sized for a single control loop, a Modbus RTU slave, or a BLE coexistence handler, not a full RTOS with a TCP/IP stack. The 1 KB EEPROM is a genuine hardware block (not emulated Flash) that survives 100k write cycles, which simplifies field-calibration and configuration storage. The STM32L031G4U6 comes in a 28-pin UFQFPN package measuring 4 mm × 4 mm — a compact, thermally efficient land-grid array with an exposed pad for heat sinking. The 21 I/O lines are enough for a handful of sensor inputs, a serial display, and a few control outputs, but you won't have spare pins for a parallel memory bus or a large switch matrix.","metaTitle":"STM32L031G4U6 ARM Cortex-M0+ MCU, 32 MHz, 16 KB Flash","metaDescription":"STMicroelectronics STM32L031G4U6 32-bit MCU with ARM Cortex-M0+ core at 32 MHz, 16 KB Flash, 8 KB RAM, 1 KB EEPROM, 1.8V–3.6V supply, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":"STM32L0","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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":"1K x 8","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"21","Core Processor":"ARM® Cortex®-M0+","Package / Case":"28-UFQFN","Product Status":"Active","Data Converters":"A/D 10x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L031","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"28-UFQFPN (4x4)","Voltage - Supply (Vcc/Vdd)":"1.8V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.8100","priceTiers":[{"qty":1,"price":"$2.81000","currency":"USD"},{"qty":10,"price":"$2.52800","currency":"USD"},{"qty":25,"price":"$2.38520","currency":"USD"},{"qty":80,"price":"$2.03238","currency":"USD"},{"qty":230,"price":"$1.90830","currency":"USD"},{"qty":440,"price":"$1.66975","currency":"USD"},{"qty":945,"price":"$1.38351","currency":"USD"},{"qty":2940,"price":"$1.28810","currency":"USD"},{"qty":5880,"price":"$1.24039","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9da9efc4233dfdd482528b8b281fc32a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L031G4U6/alternatives.json"},"ai":{"faq":[{"question":"Can STM32L031G4U6 be used with a 3.3V supply?","answer":"Yes. The supply voltage range is 1.8V to 3.6V, so a 3.3V rail is well within the operating window. No external regulator is needed if your system already has a clean 3.3V supply."},{"question":"What are the alternatives to STM32L031G4U6?","answer":"The STM32L151CBU6A is a functional alternative from the STM32L1 series: it uses an ARM Cortex-M3 core at the same 32 MHz clock, but offers more I/O (37 pins), dual 12-bit DACs, and USB connectivity. The trade-off is a larger package and higher active power — fit depends on your I/O count and peripheral needs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L031G4U6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L031G4U6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}