{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L4R9ZIY6PTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L4R9ZIY6PTR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L4R9ZIY6PTR","factsUrl":"https://icboms.com/api/mcp/products/STM32L4R9ZIY6PTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4R9ZIY6PTR, STM32L4R series, 32-bit ARM Cortex-M4 MCU, 120MHz, 2MB Flash, 640K x 8 RAM, 112 I/O, 144-WLCSP (5.24x5.24), -40°C to 85°C.","salesMarkdown":"## 120 MHz Cortex-M4 with 2 MB Flash — the high-density STM32L4R flagship This is the top-end density option in the STM32L4R family, targeting applications that need both the M4 DSP/FPU throughput and the large code store — think advanced sensor fusion, graphics-capable HMI panels, or multi-protocol IoT gateways running at industrial temperature (-40°C to 85°C). ## WLCSP package — what it means for assembly and rework The 144-WLCSP (wafer-level chip-scale package) is a bare-die footprint with solder balls directly on the silicon — no plastic overmold. The 5.24x5.24 mm body saves board area but demands tighter PCB registration and a reflow profile tuned for lead-free solder. MSL is typically 3 for this package class; if the moisture-barrier bag has been open beyond the floor-life window, a bake at 125°C for 48 hours is needed before reflow. The fine ball pitch (0.4 mm nominal) rules out hand-soldering; X-ray inspection of the BGA joints is the standard post-reflow check. For a rework lab, hot-air rework with a bottom preheat zone keeps the adjacent balls from cold-jointing. The base product number is STM32L4R9, and the series STM32L4R remains an active ST portfolio line. ROHS3 compliance is confirmed. ## Supply voltage and temperature — industrial-grade margin The 120 MHz core speed holds across the full temperature range as long as the Flash wait states are configured per the datasheet (one wait state at 120 MHz).","metaTitle":"STM32L4R9ZIY6PTR ARM Cortex-M4 MCU, 120MHz, 2MB Flash","metaDescription":"STMicroelectronics STM32L4R9ZIY6PTR 32-bit MCU with ARM Cortex-M4 core at 120MHz, 2MB Flash, 640K RAM, 112 I/O, 144-WLCSP package.","metaKeywords":null},"attributes":{"series":"STM32L4R","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"120MHz","Series":"STM32L4R","Package":"Tape & Reel (TR) Cut Tape (CT)","RAM Size":"640K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, I²C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"112","Core Processor":"ARM® Cortex®-M4","Package / Case":"144-UFBGA, WLCSP","Product Status":"Active","Data Converters":"A/D 16x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L4R9","Program Memory Size":"2MB (2M x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"144-WLCSP (5.24x5.24)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$17.4400","priceTiers":[{"qty":1,"price":"$17.44000","currency":"USD"},{"qty":10,"price":"$16.03200","currency":"USD"},{"qty":25,"price":"$15.36760","currency":"USD"},{"qty":100,"price":"$13.54000","currency":"USD"},{"qty":250,"price":"$12.87544","currency":"USD"},{"qty":500,"price":"$12.04478","currency":"USD"},{"qty":5000,"price":"$10.30036","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3911b6923e911f78d930b1bab40f9562.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L4R9ZIY6PTR/alternatives.json"},"ai":{"faq":[{"question":"What is the core processor of STM32L4R9ZIY6PTR?","answer":"The core processor is an ARM Cortex-M4, 32-bit single-core, running at 120 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L4R9ZIY6PTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L4R9ZIY6PTR 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}}