{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L433CCY6TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L433CCY6TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L433CCY6TR","factsUrl":"https://icboms.com/api/mcp/products/STM32L433CCY6TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L433CCY6TR, STM32L4 series, 32-Bit Single-Core ARM Cortex-M4 MCU, 80MHz, 256KB Flash, 64K x 8 SRAM, 1.71V-3.6V supply, -40°C to 85°C, 49-WLCSP (3.14x3.13 mm), 39 I/O, rich connectivity.","salesMarkdown":"## Active production, 80 MHz Cortex-M4 in a 3.14×3.13 mm WLCSP The 49-WLCSP package (3.14 x 3.13 mm) is the tightest footprint in the STM32L433 line, designed for space-constrained PCBs in wearables, portable medical devices, and IoT edge nodes. The flash wait state needs bumping to 1 before raising the core clock above 48 MHz, or the first branch hard-faults — a standard clock-tree step during bring-up. The 64K x 8 SRAM gives enough headroom for a FreeRTOS heap, two UART buffers, and a modest audio or graphics frame buffer. ## Supply range and brownout margin The 1.71 V minimum supply is below the 1.8 V typical for many MCUs, which matters when running from a nearly depleted Li-ion cell (cutoff ~2.7 V) or a single alkaline (1.5 V nominal, 0.9 V dead). The brown-out detect/reset peripheral (listed in the peripherals set) can be configured to hold the core in reset until the rail is stable, avoiding corruption on power-up or sag. At 3.6 V max, the part tolerates a 5 V-tolerant USB VBUS only through a regulator — direct connection exceeds the absolute maximum. The STM32L433CCY6TR includes CANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, and USB — enough to interface with most industrial sensors, displays, wireless modules, and memory cards without external bridges. The 39 I/O in the WLCSP package are multiplexed; careful pin assignment in the layout stage avoids conflicts between, say, the LCD segment driver and a high-speed SPI bus. ## 49-WLCSP: footprint and handling It saves board area versus a QFP or BGA but requires a stencil with small apertures and a reflow profile tuned for the 0.4 mm ball pitch.","metaTitle":"STM32L433CCY6TR STM32L4 ARM Cortex-M4 MCU, 80MHz","metaDescription":"STMicroelectronics STM32L433CCY6TR 32-bit MCU, 80MHz Cortex-M4, 256KB Flash, 64Kx8 SRAM, 1.71V-3.6V, -40°C to 85°C, 49-WLCSP.","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":"39","Core Processor":"ARM® Cortex®-M4","Package / Case":"49-UFBGA, WLCSP","Product Status":"Active","Data Converters":"A/D 10x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L433","Program Memory Size":"256KB (256K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"49-WLCSP (3.14x3.13)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.4400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6e323d1827cad59f98cd5297642b464c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L433CCY6TR/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between STM32L433CCY6TR and STM32L433CCT6?","answer":"The two parts share the same core, memory, and peripheral set — the key difference is the package. The STM32L433CCY6TR is in a 49-WLCSP (3.14 x 3.13 mm), while the STM32L433CCT6 is in an LQFP-48. The WLCSP saves board area but requires a more careful reflow process and is harder to rework. Pin compatibility is not guaranteed between the two packages."},{"question":"What is the maximum speed of STM32L433CCY6TR?","answer":"The core runs at 80 MHz maximum, driven by an internal oscillator or an external clock source."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L433CCY6TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L433CCY6TR 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}}