{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L431CBU6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L431CBU6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L431CBU6","factsUrl":"https://icboms.com/api/mcp/products/STM32L431CBU6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L431CBU6, STM32L4 series, ARM Cortex-M4 32-bit MCU, 80 MHz, 128 KB Flash, 64 KB SRAM, 1.71 V–3.6 V, -40°C to 85°C, 48-UFQFPN.","salesMarkdown":"This combination targets designs that need DSP or FPU acceleration without leaving the ultra-low-power domain — think sensor fusion, motor-control feedback loops, or real-time audio processing on a battery budget. The 48-UFQFPN package with exposed pad keeps the board footprint small while providing a thermal path for the core and peripherals. The peripheral set includes CANbus, I²C, SPI, UART/USART, QSPI, and SAI — enough to talk to external sensors, displays, and memory without glue logic. Brown-out detect and reset, DMA, and a PWM timer are on-die, reducing external supervisor IC count. The base product number STM32L431 covers multiple Flash and SRAM density variants in the same package footprint, so a firmware-size upgrade to the STM32L431CCU6 (256 KB Flash) is a drop-in swap if the application outgrows 128 KB.","metaTitle":"STM32L431CBU6 ARM Cortex-M4 MCU, 80 MHz, 128 KB Flash","metaDescription":"STMicroelectronics STM32L431CBU6 32-bit MCU, ARM Cortex-M4 at 80 MHz, 128 KB Flash, 64 KB SRAM. Industrial temp -40°C to 85°C. Active production.","metaKeywords":null},"attributes":{"series":"STM32L4","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"80MHz","Series":"STM32L4","Package":"Tray","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":"39","Core Processor":"ARM® Cortex®-M4","Package / Case":"48-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":"48-UFQFPN (7x7)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.1000","priceTiers":[{"qty":1,"price":"$5.10000","currency":"USD"},{"qty":10,"price":"$4.58300","currency":"USD"},{"qty":25,"price":"$4.33240","currency":"USD"},{"qty":80,"price":"$3.75463","currency":"USD"},{"qty":230,"price":"$3.56209","currency":"USD"},{"qty":440,"price":"$3.19627","currency":"USD"},{"qty":1560,"price":"$2.69565","currency":"USD"},{"qty":3120,"price":"$2.56087","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5001c15c5be880a0e65d1dfc08e4f0cc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L431CBU6/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional equivalent to STM32L431CBU6?","answer":"The STM32L151CBU6A is a pin-compatible alternative in a smaller 48-UFQFPN package, but it runs a Cortex-M3 at 32 MHz with 64 KB Flash and lacks the FPU and DSP extensions of the Cortex-M4. The STM32L431CBU6 offers roughly 2.5× the core clock speed and double the Flash for the same footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L431CBU6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L431CBU6 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}}