{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L451REI6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L451REI6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L451REI6","factsUrl":"https://icboms.com/api/mcp/products/STM32L451REI6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4 series, ARM Cortex-M4, 32-bit, 80 MHz, 512KB Flash, 160K x 8 RAM, 52 I/O, 1.71V-3.6V, -40°C to 85°C, 64-UFBGA (5x5).","salesMarkdown":"## Peripheral set and I/O — what connects where The STM32L451REI6: 16-channel 12-bit ADC and single 12-bit DAC are on-chip. Housed in a 64-UFBGA (5x5 mm) package. It is ROHS3 compliant. If you need a second-source option for dual-sourcing, the STM32L471RET6 (same Cortex-M4 core, 80 MHz, 512 KB Flash, 64-UFBGA) is a close functional match with an extra EBI/EMI interface and dual DACs — worth qualifying if board space and pinout allow.","metaTitle":"STM32L451REI6 MCU, ARM Cortex-M4, 80 MHz, 512 KB Flash","metaDescription":"STMicroelectronics STM32L451REI6 32-bit ARM Cortex-M4 MCU at 80 MHz with 512 KB Flash and 160 KB SRAM. Industrial temp -40°C to 85°C.","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":"160K 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, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"52","Core Processor":"ARM® Cortex®-M4","Package / Case":"64-UFBGA","Product Status":"Active","Data Converters":"A/D 16x12b; D/A 1x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L451","Program Memory Size":"512KB (512K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"64-UFBGA (5x5)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.8800","priceTiers":[{"qty":1,"price":"$7.88000","currency":"USD"},{"qty":10,"price":"$7.11600","currency":"USD"},{"qty":25,"price":"$6.78480","currency":"USD"},{"qty":80,"price":"$5.89100","currency":"USD"},{"qty":230,"price":"$5.62626","currency":"USD"},{"qty":440,"price":"$5.12984","currency":"USD"},{"qty":945,"price":"$4.46792","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0661af420d754d37ee77b070d7d5943e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L451REI6/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum operating frequency of STM32L451REI6?","answer":"The core runs at 80 MHz. At that speed, the Flash requires one wait state for zero-wait execution; the prefetch buffer and ART Accelerator help keep throughput high for linear code."},{"question":"What is the difference between STM32L451REI6 and STM32L452REI6?","answer":"The STM32L452REI6 adds a second 12-bit DAC and a USB OTG interface, while the STM32L451REI6 has a single DAC and no USB. Both share the same 80 MHz Cortex-M4 core, 512 KB Flash, 160 KB SRAM, and 64-UFBGA package. Choose the L452 if you need USB connectivity or dual analog outputs."},{"question":"Can STM32L451REI6 be programmed with ST-Link?","answer":"Yes, the STM32L451REI6 supports SWD (Serial Wire Debug) via the standard ST-Link/V2 or ST-Link/V3. Connect SWDIO, SWCLK, and GND; the target supply can come from the debug probe or the board's own 3.3 V rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L451REI6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L451REI6 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}}