{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L431CBU6TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L431CBU6TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L431CBU6TR","factsUrl":"https://icboms.com/api/mcp/products/STM32L431CBU6TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4 series, ARM® Cortex®-M4 32-Bit MCU, 80MHz, 128KB Flash, 64K x 8 RAM, 1.71V~3.6V, -40°C~85°C, 48-UFQFN Exposed Pad, Tape & Reel.","salesMarkdown":"The STM32L431CBU6TR: The core runs at 80 MHz with a single-precision floating-point unit. ## 48-UFQFN with exposed pad — layout and thermal notes The 38 available I/Os give enough headroom for a CAN transceiver, a few analog inputs, and a parallel LCD or QSPI flash interface without multiplexing. ## Peripherals and connectivity — what is on the bus The peripheral set includes CANbus, I²C, SPI, UART/USART, QSPI, SAI, and SWPMI — enough to talk to most industrial sensors, displays, and wireless modules without external bridge chips.","metaTitle":"STM32L431CBU6TR ARM Cortex-M4 MCU, 80 MHz, 128 KB Flash","metaDescription":"STM32L431CBU6TR from STMicroelectronics: 32-bit ARM Cortex-M4 at 80 MHz, 128 KB Flash, 64 KB SRAM, 1.71 V to 3.6 V supply, -40°C to 85°C.","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)","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":"38","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":"$2.5609","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6a1fdbdd0d5a7a205eecf25d7ff32326.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STM32L431CBU6TR in this family?","answer":"Within the STM32L431 series, the base product number STM32L431 covers multiple Flash and RAM density options in the same 48-UFQFPN footprint. The STM32L431CBU6 (non-tape-and-reel suffix) is the same die in the same package, differing only in the shipping medium. For a higher-density sibling, the STM32L431RC series offers up to 256 KB Flash while maintaining pin compatibility, though the exact memory map and available I/Os should be verified against the target firmware."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L431CBU6TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L431CBU6TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T13:13:30.547Z","lastPublished":"2026-07-16T13:13:30.547Z","indexable":true}}