{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1N16-IQR50-C3T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1N16-IQR50-C3T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1N16-IQR50-C3T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1N16-IQR50-C3T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series MCU, LM3S1N16-IQR50-C3T, 50MHz, 64KB Flash, 12K x 8 RAM, 64-LQFP, -40°C to 85°C.","salesMarkdown":"## 50 MHz Cortex-M3 with 64 KB Flash — what the memory split means for firmware The LM3S1N16-IQR50-C3T: That 12 KB RAM ceiling is the tight constraint for a real-time control loop — a moderate-size FreeRTOS heap plus a few UART buffers eats most of it, so the linker script needs a careful stack/heap split before the first prototype spins. The part belongs to the Stellaris ARM Cortex-M3S 1000 series, TI's first-generation Cortex-M3 line. It integrates an 8-channel 10-bit ADC, a full set of serial interfaces (I²C, SPI, SSI, UART/USART, IrDA, LIN, Microwire), and PWM channels — enough for a motor-control or sensor-fusion node that does not need external ADC or UART expanders. Texas Instruments has marked the LM3S1N16-IQR50-C3T as obsolete. The Stellaris family was migrated to the Tiva C series years ago, and TI no longer accepts orders through its authorized channel. Any stock in the field is the last production run — no last-time-buy window remains open. This part is sourced through independent distribution against an RFQ. Every lot is date-code and marking verified — the laser etch on the 64-LQFP package is the primary forensic check. No pin-compatible official successor exists from TI; the Tiva TM4C123 parts are a functional replacement but require a board spin and firmware port. ## Supply voltage and temperature grade — industrial range, single-rail simplicity The exposed paddle on the underside must be soldered to a thermal land on the PCB — without it, the junction-to-ambient thermal resistance rises and the 50 MHz core may throttle or drift oscillator accuracy in sustained operation.","metaTitle":"Texas Instruments LM3S1N16-IQR50-C3T, 50MHz Cortex-M3","metaDescription":"Texas Instruments LM3S1N16-IQR50-C3T Stellaris ARM Cortex-M3 MCU, 50MHz, 64KB Flash, 12K RAM, 64-LQFP. Obsolete — sourced to order against RFQ.","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 1000","Package":"Tape & Reel (TR)","RAM Size":"12K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART","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 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1N16","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"64-LQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"1.08V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/86788e4cd0934eb95c8ebca26ca40c34.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1N16-IQR50-C3T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S1N16-IQR50-C3T?","answer":"There is no pin-compatible official successor from Texas Instruments. The Tiva TM4C123 series is the functional replacement but uses a different pinout and requires PCB layout changes. For an exact drop-in, the only source is existing surplus inventory of the LM3S1N16 itself."},{"question":"What compliance documentation is available for LM3S1N16-IQR50-C3T?","answer":"The part is RoHS-compliant per TI's standard material declaration. Full datasheet and PCN history are available from TI's documentation archive."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1N16-IQR50-C3T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1N16-IQR50-C3T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:48:57.002Z","lastPublished":"2026-07-21T02:48:57.002Z","indexable":true}}