{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32F401CEY6BTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32F401CEY6BTR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32F401CEY6BTR","factsUrl":"https://icboms.com/api/mcp/products/STM32F401CEY6BTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32F4 series STM32F401CEY6BTR, ARM Cortex-M4 32-Bit Single-Core MCU, 84MHz, 512KB Flash, 96K x 8 RAM, 49-WLCSP (2.97x2.97), -40°C~85°C, 1.7V~3.6V.","salesMarkdown":"It packs a single-core Cortex-M4 with DSP and floating-point instructions into a 49-ball WLCSP (2.97x2.97 mm) — the kind of package you spec when board area is the tightest constraint, like a wearable, a sensor module, or a portable medical probe. ## 84 MHz, 512 KB Flash, 96K RAM — the BOM-fit tier The 36 I/Os and connectivity set — I²C, SPI, UART/USART, USB OTG, SDIO — cover most sensor-fusion and human-interface designs. For ongoing production, secure your last-time-buy quantities or plan a pin-compatible migration. ## WLCSP footprint — what the reflow line needs to know That means the MSL rating (typically MSL 1 or MSL 3 for this package type) must be confirmed before the reel hits the oven; a high-MSL part that skipped the bake will popcorn. The 0.4 mm or 0.5 mm ball pitch demands a fine-feature stencil and tight solder-paste volume control.","metaTitle":"STM32F401CEY6BTR ARM Cortex-M4 MCU, 84 MHz, 512 KB Flash","metaDescription":"STM32F401CEY6BTR 32-bit ARM Cortex-M4 MCU, 84 MHz, 512 KB Flash, 96K x 8 RAM, 49-WLCSP. NRND lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"84MHz","Series":"STM32F4","Package":"Tape & Reel (TR)","RAM Size":"96K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, SDIO, SPI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"36","Core Processor":"ARM® Cortex®-M4","Package / Case":"49-UFBGA, WLCSP","Product Status":"Not For New Designs","Data Converters":"A/D 10x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32F401","Program Memory Size":"512KB (512K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"49-WLCSP (2.97x2.97)","Voltage - Supply (Vcc/Vdd)":"1.7V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.6465","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3f739c6e7b3a419d9a7183e4b2cf48ca.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32F401CEY6BTR/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between STM32F401CEY6BTR and STM32F401CEY6?","answer":"The 'BTR' suffix indicates Tape & Reel packaging, while the base STM32F401CEY6 typically ships in tray or bulk. The silicon and package are identical — the difference is the shipping medium for automated assembly lines."},{"question":"What package is STM32F401CEY6BTR in?","answer":"It is in a 49-ball WLCSP (Wafer-Level Chip-Scale Package) with a 2.97x2.97 mm body. The footprint is the die size — no mould compound — so handle it with the same care as a bare die."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32F401CEY6BTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32F401CEY6BTR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}