{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32F303RBT6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32F303RBT6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32F303RBT6","factsUrl":"https://icboms.com/api/mcp/products/STM32F303RBT6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32F303RBT6, STM32F3 series, 32-Bit Single-Core ARM Cortex-M4, 72 MHz, 128KB (128K x 8) FLASH, 32K x 8 RAM, 52 I/O, 22x12b ADC, 2x12b DAC, 2V~3.6V, -40°C~85°C, 64-LQFP, Tray.","salesMarkdown":"## Mixed-signal Cortex-M4 with 22 analog channels The internal oscillator means it can run without an external crystal for cost-sensitive builds, though the PLL still needs a clean reference if you push the core to 72 MHz. ## 128 KB Flash — sizing the firmware budget The 128 KB Flash (128K x 8) is the mid-density option in the STM32F303R line. It is enough for a moderate control-loop stack with a real-time OS, a USB stack, and a CANopen node, but you will hit the ceiling if you try to pack a full GUI framebuffer or an audio-processing pipeline. The sibling STM32F303RCT6 doubles the Flash to 256 KB — that is the part to reach for when the firmware image outgrows 128 KB. For dual-sourcing resilience, the pin-compatible STM32F303CCT6 (37 I/O, same core and Flash) is a valid second source if your board can tolerate the reduced I/O count.","metaTitle":"STM32F303RBT6 STMicroelectronics ARM Cortex-M4 MCU, 72 MHz","metaDescription":"STM32F303RBT6 32-bit ARM Cortex-M4 MCU, 72 MHz, 128 KB Flash, 32K x 8 RAM, 52 I/O, 22x12b ADC, 2x12b DAC, -40 to 85°C, 64-LQFP. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"STM32F3","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"72MHz","Series":"STM32F3","Package":"Tray","RAM Size":"32K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"DMA, I²S, POR, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, LINbus, SPI, UART/USART, USB","Mounting Type":"Surface Mount","Number of I/O":"52","Core Processor":"ARM® Cortex®-M4","Package / Case":"64-LQFP","Product Status":"Active","Data Converters":"A/D 22x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32F303","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"64-LQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"2V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.1600","priceTiers":[{"qty":1,"price":"$7.16000","currency":"USD"},{"qty":10,"price":"$6.47000","currency":"USD"},{"qty":25,"price":"$6.16880","currency":"USD"},{"qty":160,"price":"$5.35638","currency":"USD"},{"qty":320,"price":"$5.11563","currency":"USD"},{"qty":480,"price":"$4.66425","currency":"USD"},{"qty":960,"price":"$4.06242","currency":"USD"},{"qty":2400,"price":"$3.91195","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a474e904fc1228ff23e70edcbd9a36eb.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32F303RBT6/alternatives.json"},"ai":{"faq":[{"question":"What is the flash memory size of STM32F303RBT6?","answer":"The program memory is 128 KB (128K x 8) of Flash."},{"question":"Does STM32F303RBT6 have USB?","answer":"Yes, the connectivity set includes USB alongside CANbus, I²C, IrDA, LINbus, SPI, and UART/USART."},{"question":"Is STM32F303RBT6 a drop-in replacement for STM32F303RCT6?","answer":"The STM32F303RCT6 doubles the Flash to 256 KB but is otherwise pin-compatible in the same 64-LQFP package with the same core, speed, and peripheral set. Whether it is a drop-in depends on whether your firmware fits within 128 KB — if it does, the RBT6 is a direct replacement; if the application needs the extra Flash, the RCT6 is the part to use."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32F303RBT6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32F303RBT6 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}}