{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S2939-IQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S2939-IQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S2939-IQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S2939-IQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 2000 32-Bit MCU, LM3S2939-IQC50-A2T, 50MHz, 256KB Flash, 64K x 8 RAM, 57 I/O, 100-LQFP.","salesMarkdown":"## 50MHz Cortex-M3 with 256KB Flash — what it means for the BOM The LM3S2939-IQC50-A2T: That puts it in the sweet spot for control applications that need more than a basic 8-bit part but don't require the overhead of a full MPU. On-chip memory is 256 KB of flash and 64K x 8 of RAM. For a typical firmware image with a small RTOS and a CAN stack, that leaves comfortable headroom for the application layer — you won't be squeezing code into the last sector. The 57 GPIOs and peripheral set — CAN, I²C, SPI, UART, plus a QEI for motor feedback — cover a lot of industrial control and sensor-fusion scenarios without needing external glue logic. ## NRND — what that means for procurement Texas Instruments lists this part as NRND (Not Recommended for New Designs). That means it's still available for existing production, but don't spin a new board around it — the long-term supply window is closing. For a field repair or a BOM that's already qualified, the NRND status isn't a showstopper: the part is still orderable through distribution. But if you're doing a redesign, look at TI's current Cortex-M4 or M7 families for a pin-compatible migration path — the package and supply voltage are your main constraints. ## Package and supply — board-fit checklist That's a standard footprint — most assembly houses handle it without a premium. The internal oscillator means you can skip an external crystal for many applications, saving two pins and a bit of board space.","metaTitle":"TI LM3S2939-IQC50-A2T ARM Cortex-M3 MCU, 50MHz, 256KB Flash","metaDescription":"Texas Instruments LM3S2939-IQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz, 256KB Flash, 64K x 8 RAM, 57 I/O, CAN/I2C/SPI/UART, NRND. Sourced to order.","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":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"57","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Not For New Designs","Data Converters":"A/D 3x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S2939","Program Memory Size":"256KB (256K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$16.0680","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S2939-IQC50-A2T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S2939-IQC50-A2T?","answer":"The 100-LQFP package and 2.25-2.75 V supply are your constraints; a migration to a newer Cortex-M4 in the same package footprint would require a board spin for the supply rail and peripheral mapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S2939-IQC50-A2T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S2939-IQC50-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:51:55.839Z","lastPublished":"2026-07-21T02:51:55.839Z","indexable":true}}