{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L431RBT6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L431RBT6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L431RBT6","factsUrl":"https://icboms.com/api/mcp/products/STM32L431RBT6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L431RBT6, STM32L4 series, 32-Bit Single-Core ARM Cortex-M4 MCU, 80 MHz, 128 KB Flash, 64K x 8 RAM, 52 I/O, 1.71V-3.6V, -40°C to 85°C, 64-LQFP tray.","salesMarkdown":"The STM32L431RBT6: ARM Cortex-M4 core runs at 80 MHz with DSP instructions and single-cycle MAC. 128 KB Flash and 64K x 8 RAM support an RTOS, communications, and control loop. ## Connectivity and peripherals — industrial and audio-ready The brown-out detect and reset block keeps the core from running on a marginal supply, which matters for battery-powered gear where the rail sags under load. The base product number STM32L431 is a mainstream STM32L4 variant, so the supply chain is mature and the part is widely stocked across distribution.","metaTitle":"STM32L431RBT6 STM32L4 MCU, ARM Cortex-M4, 80 MHz","metaDescription":"STMicroelectronics STM32L431RBT6 32-bit ARM Cortex-M4 MCU, 80 MHz, 128 KB Flash, 64K x 8 RAM, 52 I/O, -40°C to 85°C, 64-LQFP.","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, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"52","Core Processor":"ARM® Cortex®-M4","Package / Case":"64-LQFP","Product Status":"Active","Data Converters":"A/D 16x12b; 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":"64-LQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.8200","priceTiers":[{"qty":1,"price":"$5.82000","currency":"USD"},{"qty":10,"price":"$5.22900","currency":"USD"},{"qty":25,"price":"$4.94280","currency":"USD"},{"qty":80,"price":"$4.28388","currency":"USD"},{"qty":230,"price":"$4.06417","currency":"USD"},{"qty":440,"price":"$3.64677","currency":"USD"},{"qty":960,"price":"$3.07559","currency":"USD"},{"qty":2880,"price":"$2.92181","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5001c15c5be880a0e65d1dfc08e4f0cc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L431RBT6/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between STM32L431RBT6 and STM32L433?","answer":"The STM32L433 is a close sibling in the same STM32L4 family, typically adding a TFT-LCD parallel interface and a larger Flash density option. The STM32L431RBT6 has 128 KB Flash and 64K x 8 RAM, while the STM32L433 starts at 256 KB Flash. If you don't need the display controller or the extra memory, the STM32L431RBT6 is the cost-optimized choice."},{"question":"Is STM32L431RBT6 compatible with the STM32L4 series?","answer":"Yes — the STM32L431RBT6 is a member of the STM32L4 series. It shares the same ARM Cortex-M4 core, peripheral set, and low-power architecture as other STM32L4 parts, so code and pin-compatible migration within the series is straightforward."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L431RBT6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L431RBT6 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}}