{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L431CCU6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L431CCU6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L431CCU6","factsUrl":"https://icboms.com/api/mcp/products/STM32L431CCU6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4 series STM32L431CCU6, ARM Cortex-M4, 32-Bit Single-Core, 80MHz, 256KB Flash, 64K x 8 RAM, 39 I/O, CANbus, I²C, SPI, UART/USART, 48-UFQFN Exposed Pad, -40°C ~ 85°C.","salesMarkdown":"It is designed for sensor fusion, industrial control, and battery-operated equipment where the balance between processing throughput and power draw is critical. The integrated 12-bit ADC (10 channels) and dual 12-bit DAC cover most analog front-end needs without an external converter. ## 256 KB Flash endurance and retention — planning the firmware lifecycle The 256 KB of embedded Flash is rated for 100k program/erase cycles per sector (typical for the STM32L4 family) with 10-year data retention at 85°C. For OTA firmware updates, the 64 KB SRAM provides enough staging buffer to avoid double-banking the Flash. Budget the ECC in the application layer if the part will see frequent writes — the Flash controller handles single-bit error correction internally, but multi-bit errors require software mitigation.","metaTitle":"STM32L431CCU6 MCU, ARM Cortex-M4, 80 MHz, 256 KB Flash","metaDescription":"STM32L431CCU6 32-bit MCU from STM32L4 series. ARM Cortex-M4 core at 80 MHz, 256 KB Flash, 64 KB SRAM. Industrial temp range -40°C to 85°C. Active lifecycle.","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":"256KB (256K 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":"$5.8900","priceTiers":[{"qty":1,"price":"$5.89000","currency":"USD"},{"qty":10,"price":"$5.28700","currency":"USD"},{"qty":25,"price":"$4.99840","currency":"USD"},{"qty":80,"price":"$4.33188","currency":"USD"},{"qty":230,"price":"$4.10978","currency":"USD"},{"qty":440,"price":"$3.68768","currency":"USD"},{"qty":1560,"price":"$3.11010","currency":"USD"},{"qty":3120,"price":"$2.95459","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5001c15c5be880a0e65d1dfc08e4f0cc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L431CCU6/alternatives.json"},"ai":{"faq":[{"question":"Is STM32L431CCU6 obsolete or end-of-life?","answer":"No, STM32L431CCU6 carries an Active lifecycle status."},{"question":"What are equivalent models to STM32L431CCU6?","answer":"A functional peer is the STM32L151CBU6A from the STM32L1 series, which uses an ARM Cortex-M3 core at 32 MHz with 37 I/O and a similar peripheral set. The STM32L431CCU6 offers roughly 2.5x the core clock speed and a Cortex-M4 with DSP extensions, so it is not a pin-compatible drop-in — evaluate the memory map and peripheral register differences before substituting."},{"question":"What is STM32L431CCU6's listed speed?","answer":"The STM32L431CCU6 is rated for a maximum core speed of 80 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L431CCU6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L431CCU6 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}}