{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32F105RBT6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32F105RBT6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32F105RBT6","factsUrl":"https://icboms.com/api/mcp/products/STM32F105RBT6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32F105RBT6, STM32F1 series, 32-bit ARM Cortex-M3 MCU, 72 MHz, 128 KB Flash, 64 KB RAM, USB OTG, CAN, 51 I/O, 64-LQFP, -40 to 85°C.","salesMarkdown":"It includes a USB OTG peripheral that lets the device act as either a USB host or device without an external controller — a feature that sets it apart from many STM32F103 variants. The 128 KB of Flash (organized as 128K x 8) and 64 KB of SRAM (64K x 8) define the firmware and data budget. For a typical real-time control stack with USB and CAN protocol handling, the Flash fills faster than you might expect — a full USB OTG stack plus a CANopen node can consume 40–60 KB, leaving room for application code but not a heavy GUI or file system. The 64 KB RAM is generous for an MCU in this tier; it supports double-buffered USB transfers and a moderate-size RTOS heap without external memory. ## Peripherals and connectivity — CAN, USB OTG, and the usual serial bus set The USB OTG is the headline differentiator in the STM32F1 family — it lets the MCU talk to USB flash drives, keyboards, or a host PC without a separate PHY or controller chip. ## 64-LQFP package — rework and layout notes The 64-LQFP is a fine-pitch (0.5 mm) surface-mount package that reflows well with a standard profile.","metaTitle":"STM32F105RBT6 ARM Cortex-M3 MCU, 72 MHz, 128 KB Flash","metaDescription":"STMicroelectronics STM32F105RBT6 32-bit ARM Cortex-M3 MCU, 72 MHz core, 128 KB Flash, 64 KB RAM, USB OTG, CAN, 64-LQFP, -40 to 85°C. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"72MHz","Series":"STM32F1","Package":"Tray","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"DMA, POR, PWM, Voltage Detect, WDT","Connectivity":"CANbus, I²C, IrDA, LINbus, SPI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"51","Core Processor":"ARM® Cortex®-M3","Package / Case":"64-LQFP","Product Status":"Active","Data Converters":"A/D 16x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32F105","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Voltage - Supply (Vcc/Vdd)":"2V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.5800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/813271393bd0544f247ae965ea1bf2b0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32F105RBT6/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STM32F105RBT6?","answer":"Within the STM32F1 series, the STM32F103RBT6 is a common pin-compatible alternative but lacks the USB OTG peripheral. The STM32F105R8T6 (64 KB Flash) is a lower-density sibling in the same package. Verify the specific peripheral set and memory size against your firmware requirements before substituting."},{"question":"What is STM32F105RBT6's listed speed?","answer":"The core is an ARM Cortex-M3 running at 72 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32F105RBT6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32F105RBT6 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}}