{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L433RCI3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L433RCI3","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L433RCI3","factsUrl":"https://icboms.com/api/mcp/products/STM32L433RCI3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L433RCI3, STM32L4 series, 32-bit ARM Cortex-M4 MCU, 80 MHz, 256 KB Flash, 64 KB SRAM, 1.71 V to 3.6 V, -40°C to 125°C, 64-UFBGA (5x5 mm).","salesMarkdown":"## 80 MHz Cortex-M4 in a 5x5 mm BGA — the power-constrained performance tier It targets designs that need the DSP and FPU throughput of a Cortex-M4 but must stay within the ultra-low-power envelope of the STM32L4 family — think battery-operated instrumentation, sensor fusion hubs, and portable medical devices where every milliamp matters. The STM32L4's multiple low-power modes (sleep, stop, standby) still function across the full temperature span, which is not guaranteed on every MCU in this class. ## 256 KB Flash / 64 KB SRAM — sizing the firmware and data buffer That Flash is enough for a full RTOS, a USB stack, and a moderately complex application layer; the 64 KB SRAM handles dual frame buffers for a 320x240 display or a large circular DMA buffer for sensor data. The 12-bit ADC (16 channels) and dual 12-bit DAC are on-chip, so mixed-signal front-ends don't consume extra package pins or board area. ## Connectivity and peripherals — CAN, USB, QSPI, and more The QSPI interface lets you memory-map an external serial Flash for code-execution or data-logging expansion without chewing up GPIO. Brown-out detect and reset, DMA, an LCD controller, PWM, and a watchdog timer round out the on-chip resources. With 52 I/O lines in the 64-UFBGA, most of these peripherals can be active simultaneously. For a production BOM being qualified today, this MCU is a safe selection — no forced redesign horizon from the manufacturer.","metaTitle":"STM32L433RCI3 STM32L4 ARM Cortex-M4 MCU, 80 MHz","metaDescription":"STMicroelectronics STM32L433RCI3 32-bit MCU with ARM Cortex-M4 core at 80 MHz, 256 KB Flash, 64 KB SRAM, -40°C to 125°C, 64-UFBGA.","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":"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","Product Status":"Active","Data Converters":"A/D 16x12b; 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~125°C(TA)","Supplier Device Package":"64-UFBGA (5x5)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.8000","priceTiers":[{"qty":1,"price":"$8.80000","currency":"USD"},{"qty":10,"price":"$7.95400","currency":"USD"},{"qty":25,"price":"$7.58400","currency":"USD"},{"qty":80,"price":"$6.58513","currency":"USD"},{"qty":230,"price":"$6.28917","currency":"USD"},{"qty":440,"price":"$5.73425","currency":"USD"},{"qty":945,"price":"$5.04480","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6e323d1827cad59f98cd5297642b464c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L433RCI3/alternatives.json"},"ai":{"faq":[{"question":"How does STM32L433RCI3 compare to the older STM32L151CBU6A?","answer":"The STM32L433RCI3 runs an ARM Cortex-M4 at 80 MHz with FPU and DSP instructions, versus the Cortex-M3 at 32 MHz in the STM32L151CBU6A. The L4 part also offers more SRAM (64 KB vs 16 KB), a wider supply range down to 1.71 V, and a higher temperature grade (125°C vs 85°C). The L151 is a lower-cost, lower-power alternative for 8/16-bit application upgrades; the L433 is the performance tier for signal-processing and mixed-signal workloads."},{"question":"What development board supports STM32L433RCI3?","answer":"The NUCLEO-L433RC-P and STM32L433RC-DISCO discovery boards support the STM32L433RC series. These boards provide access to the full peripheral set for prototyping and firmware development."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L433RCI3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L433RCI3 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}}