{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L443RCY6TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L443RCY6TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L443RCY6TR","factsUrl":"https://icboms.com/api/mcp/products/STM32L443RCY6TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4 series STM32L443RCY6TR, ARM Cortex-M4 32-Bit Single-Core MCU, 80MHz, 256KB Flash, 64K x 8 RAM, 52 I/O, CANbus/I²C/SPI/USB, 1.71V-3.6V, -40°C~85°C, 64-WLCSP.","salesMarkdown":"The 80 MHz ceiling is the performance tier that separates this part from the lower-speed STM32L0/ family; if your algorithm needs a hardware FPU and DSP instructions, the Cortex-M4 core here delivers that without stepping up to the higher-power STM32F4 series. ## WLCSP-64 package — board area vs assembly trade-off Housed in a 64-ball WLCSP (wafer-level chip-scale package) measuring 3.14 x 3.13 mm, this part saves significant board area compared to a QFP or BGA of the same I/O count. The trade-off: WLCSP requires a solder-bump reflow process and careful handling — the package is moisture-sensitive and the balls are the component's sole mechanical attachment. ## Connectivity and analog integration On the peripheral side, this MCU includes CANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, and USB — enough to interface with industrial fieldbuses, external Flash via QSPI, and human-machine interfaces. The analog subsystem integrates a 16-channel 12-bit ADC and two 12-bit DACs, plus brown-out detect, DMA, LCD drive, PWM, and a watchdog timer. It is not qualified to AEC-Q100, so it is not intended for under-hood or safety-critical automotive domains.","metaTitle":"STM32L443RCY6TR ARM Cortex-M4 MCU, 80MHz, 256KB Flash","metaDescription":"STMicroelectronics STM32L443RCY6TR 32-bit ARM Cortex-M4 MCU at 80MHz, 256KB Flash, 64KB SRAM, WLCSP-64 package, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"80MHz","Series":"STM32L4","Package":"Tape & Reel (TR) Cut Tape (CT)","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, LCD, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, USB","Mounting Type":"Surface Mount","Number of I/O":"52","Core Processor":"ARM® Cortex®-M4","Package / Case":"64-UFBGA, WLCSP","Product Status":"Active","Data Converters":"A/D 16x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L443","Program Memory Size":"256KB (256K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"64-WLCSP (3.14x3.13)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.2705","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/95850be2029da0766935bf1246526e77.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STM32L443RCY6TR in the STM32L4 family?","answer":"Within the STM32L4 series, the STM32L443RCT6 (LQFP-64) shares the same core, memory, and peripheral set but uses a different package — the WLCSP version (this part) is not pin-compatible with the LQFP variant. For a true drop-in in the same WLCSP-64 footprint, look at the STM32L443RCY6 (without the TR suffix) — same silicon, same package, just different tape-and-reel packaging. The base product number STM32L443 covers the full density and package options."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L443RCY6TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L443RCY6TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T12:48:12.758Z","lastPublished":"2026-07-16T12:48:12.758Z","indexable":true}}