{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S2678-IQR50-A0T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S2678-IQR50-A0T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S2678-IQR50-A0T","factsUrl":"https://icboms.com/api/mcp/products/LM3S2678-IQR50-A0T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 2000 series LM3S2678-IQR50-A0T, 32-bit single-core MCU, 50 MHz, 128 KB Flash, 32K x 8 SRAM, CANbus, 64-LQFP, -40°C to 85°C, 2.25 V to 2.75 V supply.","salesMarkdown":"## 50 MHz Cortex-M3 with CAN — what it covers The Texas Instruments LM3S2678-IQR50-A0T is a Stellaris ARM Cortex-M3S 2000 series microcontroller built around a 32-bit ARM Cortex-M3 core running at 50 MHz. The peripheral set includes CANbus, IrDA, Microwire, QEI, SPI, SSI, and UART/USART — so it can bridge a CAN-based fieldbus to a local sensor cluster over SPI or a debug UART. This is a mid-range MCU for industrial control nodes, motor-drive comms, or building-automation gateways that need CAN without stepping up to a larger package or higher pin count. ## NRND — plan the last buy or the migration That means TI is not actively pushing this part into new sockets, and the production window is finite. For existing production, the NRND flag is the signal to secure a last-time-buy quantity or arrange a qualified second source through independent distribution. The 64-LQFP package (10x10 mm) has 33 I/Os. ## Peripherals and memory for a control node Beyond CAN, the peripheral list includes a quadrature encoder interface (QEI) for motor position feedback, PWM for drive signals, and a watchdog timer. The 128 KB Flash is split into 1 KB sectors — fine for an OTA staging area if you manage wear leveling, though the 100k-cycle endurance is typical for this class. The 32 KB SRAM (32K x 8) holds a real-time OS heap and a couple of CAN message buffers without thrashing.","metaTitle":"LM3S2678-IQR50-A0T Stellaris ARM Cortex-M3 MCU, 50 MHz","metaDescription":"Texas Instruments LM3S2678-IQR50-A0T Stellaris ARM Cortex-M3 MCU, 50 MHz, 128 KB Flash, 32 KB SRAM, CAN, industrial temp -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 2000","Package":"Tape & Reel (TR)","RAM Size":"32K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"CANbus, IrDA, Microwire, QEI, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"33","Core Processor":"ARM® Cortex®-M3","Package / Case":"64-LQFP","Product Status":"Not For New Designs","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S2678","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":"$19.0242","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/480bdc57ed675d3855ec4fab1b7736db.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S2678-IQR50-A0T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S2678-IQR50-A0T obsolete?","answer":"Existing production should plan a last-time buy or a migration to an active Stellaris or TM4C family member."},{"question":"Is LM3S2678-IQR50-A0T pin compatible with other Stellaris microcontrollers?","answer":"The 64-LQFP package footprint is common across the Stellaris family, but pin compatibility varies by peripheral mix and supply voltage. Verify the target part's datasheet against the LM3S2678 pinout before assuming a drop-in swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S2678-IQR50-A0T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S2678-IQR50-A0T 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}}