{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S3651-IQR50-A0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S3651-IQR50-A0","canonicalUrl":"https://icboms.com/texas-instruments/LM3S3651-IQR50-A0","factsUrl":"https://icboms.com/api/mcp/products/LM3S3651-IQR50-A0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 3000 series LM3S3651-IQR50-A0, 32-Bit Single-Core MCU, 50MHz, 128KB Flash, 32K x 8 RAM, USB OTG, 64-LQFP, -40°C to 85°C.","salesMarkdown":"## 128 KB Flash, 32K x 8 RAM — memory budget for firmware The LM3S3651-IQR50-A0: The 128 KB Flash (128K x 8) and 32K x 8 SRAM place this MCU in the mid-range of the Stellaris family. The Flash suits a single firmware image with room for a modest bootloader; the SRAM handles a couple of USB buffers plus a real-time control loop's data structures. The LM3S3651-IQR50-A0 lifecycle status is Obsolete. For existing BOM lines, procurement must source through independent distribution or the surplus channel. ## Peripheral set — USB OTG plus legacy serial The connectivity block includes I²C, SPI, SSI, Microwire, UART/USART, IrDA, and USB OTG — one of the few Stellaris parts with both USB host/device capability and a full set of legacy serial buses. Brown-out detect, POR, PWM, and WDT are on-chip for supervision and motor-control PWM generation.","metaTitle":"LM3S3651-IQR50-A0 Stellaris ARM Cortex-M3 MCU, 50MHz","metaDescription":"LM3S3651-IQR50-A0 Stellaris ARM Cortex-M3 MCU, 50MHz core, 128KB Flash, 32K x 8 RAM, USB OTG, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 3000","Package":"Tray","RAM Size":"32K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I²C, IrDA, Microwire, SPI, SSI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"33","Core Processor":"ARM® Cortex®-M3","Package / Case":"64-LQFP","Product Status":"Obsolete","Data Converters":"A/D 4x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S3651","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)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.4417","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S3651-IQR50-A0/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3S3651-IQR50-A0?","answer":"No official replacement order code is recorded for this part. For a pin-compatible alternative, look at other Stellaris LM3S parts in the 64-LQFP package with USB OTG — but verify the peripheral set and memory sizing against your firmware image, as the family has density and feature variations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S3651-IQR50-A0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S3651-IQR50-A0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}