{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L431RCT6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L431RCT6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L431RCT6","factsUrl":"https://icboms.com/api/mcp/products/STM32L431RCT6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4 series, STM32L431RCT6, ARM Cortex-M4 32-Bit Single-Core MCU, 80MHz, 256KB Flash, 64K x 8 RAM, CAN/I²C/SPI/USART, 52 I/O, 64-LQFP, -40°C to 85°C.","salesMarkdown":"## 80 MHz Cortex-M4 with 256 KB Flash — what this means for the BOM The STM32L431RCT6: It belongs to the STM32L4 ultra-low-power series, designed for applications where active compute throughput and standby current both matter — think sensor-fusion nodes, battery-operated industrial controllers, and communication gateways that need to run a real-time OS and still hit years of coin-cell life. ## Industrial temperature grade and where this part lives That 85°C ceiling covers most commercial and light-industrial deployments. ## Connectivity and peripheral set — what is on the bus This MCU carries CANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, and UART/USART interfaces. The QSPI interface is worth calling out: it lets you attach external serial Flash or PSRAM for data logging or OTA staging without chewing up GPIO for a parallel bus. The ROHS3 compliance is confirmed on the product marking, so it passes EU and global restricted-substance requirements without a waiver. ## Package and mounting — 64-LQFP footprint details A formal RFQ is the fastest way to lock a price break and delivery window for your BOM line.","metaTitle":"STM32L431RCT6 STMicroelectronics MCU, 80MHz Cortex-M4","metaDescription":"STMicroelectronics STM32L431RCT6 ARM Cortex-M4 32-bit MCU at 80MHz with 256KB Flash and 64KB 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, 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":"256KB (256K 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":"$6.6100","priceTiers":[{"qty":1,"price":"$6.61000","currency":"USD"},{"qty":10,"price":"$5.93300","currency":"USD"},{"qty":25,"price":"$5.60920","currency":"USD"},{"qty":80,"price":"$4.86138","currency":"USD"},{"qty":230,"price":"$4.61200","currency":"USD"},{"qty":440,"price":"$4.13834","currency":"USD"},{"qty":960,"price":"$3.49018","currency":"USD"},{"qty":2880,"price":"$3.31567","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5001c15c5be880a0e65d1dfc08e4f0cc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L431RCT6/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum operating frequency of STM32L431RCT6?","answer":"That 80 MHz ceiling gives enough throughput for real-time sensor fusion, PID loops, and protocol stacks without needing an external crystal for the core clock."},{"question":"What is the equivalent part to STM32L431RCT6?","answer":"A functional peer within ST's portfolio is the STM32L151CBU6A, which uses an ARM Cortex-M3 core at 32 MHz with similar peripheral set (I²C, SPI, UART, USB) and the same 12-bit ADC/DAC resolution. The STM32L431RCT6 offers roughly 2.5x the core clock speed and a richer connectivity set including CAN and QSPI, so the choice depends on whether your firmware needs the Cortex-M4 DSP extensions and higher throughput."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L431RCT6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L431RCT6 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}}