{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L431KBU6TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L431KBU6TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L431KBU6TR","factsUrl":"https://icboms.com/api/mcp/products/STM32L431KBU6TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4 series, ARM Cortex-M4, 32-Bit Single-Core, 80 MHz, 128KB Flash, 64K x 8 RAM, 26 I/O, CANbus/I²C/SPI/UART/USART, 1.71V~3.6V, -40°C~85°C, 32-UFQFPN (5x5).","salesMarkdown":"The STM32L431KBU6TR is an STMicroelectronics 32-bit ARM Cortex-M4 MCU clocked at 80 MHz, with 128 KB of Flash and 64 KB of SRAM. It sits in the STM32L4 ultra-low-power series, designed for applications where active current and wake-up latency matter — think battery-operated sensors, portable medical gear, or field instruments that run on a coin cell for months. The 80 MHz core with single-cycle multiply and a hardware FPU handles sensor fusion or PID loops without loading the CPU. Housed in a 32-lead UFQFPN with exposed pad, 5×5 mm footprint. The industrial temperature range covers outdoor telecom cabinets, engine-bay-adjacent controllers, and factory-floor enclosures without active cooling.","metaTitle":"ST STM32L431KBU6TR ARM Cortex-M4 MCU, 80 MHz, 128 KB Flash","metaDescription":"STM32L431KBU6TR is an STMicroelectronics 32-bit ARM Cortex-M4 MCU at 80 MHz with 128 KB Flash and 64 KB RAM. Active lifecycle, -40 to 85 °C. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"80MHz","Series":"STM32L4","Package":"Tape & Reel (TR); Cut Tape (CT)","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"26","Core Processor":"ARM® Cortex®-M4","Package / Case":"32-UFQFN Exposed Pad","Product Status":"Active","Data Converters":"A/D 10x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L431","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"32-UFQFPN (5x5)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.9700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5001c15c5be880a0e65d1dfc08e4f0cc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L431KBU6TR/alternatives.json"},"ai":{"faq":[{"question":"What is the datasheet for STM32L431KBU6TR?","answer":"The datasheet covers the full STM32L431x family, including the KBU6 variant. It details the 80 MHz Cortex-M4 core, memory map, peripheral registers, electrical characteristics, and package drawing."},{"question":"What is the closest pin-compatible alternative to STM32L431KBU6TR?","answer":"Within the STM32L431 family, the STM32L431KCU6 offers 256 KB Flash in the same 32-UFQFPN package and pinout — a drop-in upgrade if firmware size is the constraint. For a lower-power sibling, the STM32L431KBU3 runs at -40 to 125 °C but shares the same footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L431KBU6TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L431KBU6TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T10:39:33.080Z","lastPublished":"2026-07-16T10:39:33.080Z","indexable":true}}