{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1W16-IQR50-C3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1W16-IQR50-C3","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1W16-IQR50-C3","factsUrl":"https://icboms.com/api/mcp/products/LM3S1W16-IQR50-C3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series 32-bit MCU, LM3S1W16-IQR50-C3, 50 MHz core, 32 KB Flash, 8 KB SRAM, 64-LQFP (10x10 mm), -40 to 85°C.","salesMarkdown":"Texas Instruments has marked the LM3S1W16-IQR50-C3 as obsolete. The part is no longer available through standard authorized distribution channels. Availability and pricing are lot-specific and confirmed at RFQ time — no stock-holding claim is made here. ## Core and memory — what the 50 MHz and 32 KB Flash mean for fit The ARM Cortex-M3 core runs at 50 MHz, a 32-bit single-core architecture. This clock rate is sufficient for control loops in the tens of kilohertz range, protocol handling (UART, SPI, I²C), and moderate data-logging tasks. It is not suited for DSP-intensive workloads or high-speed motor FOC without an external accelerator. Program memory is 32 KB of Flash, with 8 KB of SRAM. For a typical firmware image including a HAL, RTOS kernel, and application code, budget about 12–16 KB for the binary — leaving 16–20 KB for application logic. The 8 KB SRAM holds stack, heap, and global data; a moderate sensor array or a small display buffer will consume most of it. ## Package and supply voltage — board-fit constraints Housed in a 64-LQFP package with a 10x10 mm body, the part uses a 0.5 mm pitch. This dual-supply scheme adds a regulator and decoupling network compared to single-supply 3.3 V MCUs. This qualifies the device for factory-floor automation, outdoor telecom enclosures, and engine-bay-adjacent applications where ambient temperature stays below 85°C. ## Peripherals and I/O — what is on-chip The LM3S1W16 integrates 33 general-purpose I/O lines, an 8-channel 10-bit ADC, and a set of serial interfaces: I²C, SPI, SSI, UART/USART, plus IrDA and LINbus. On-chip peripherals include brown-out detect, POR, DMA, PWM, and a watchdog timer. For a basic control application — reading a few analog sensors, driving a small display, and communicating over a serial bus — this eliminates the need for external ADC or UART chips.","metaTitle":"TI LM3S1W16-IQR50-C3 ARM Cortex-M3 MCU, 50 MHz, 32 KB Flash","metaDescription":"Texas Instruments LM3S1W16-IQR50-C3 Stellaris ARM Cortex-M3 MCU, 50 MHz, 32 KB Flash, 8 KB SRAM, 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":"Tray","RAM Size":"8K 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":"LM3S1W16","Program Memory Size":"32KB (32K 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 ~ 1.32V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b9d77d74fa09210f5608deba6bd6e816.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1W16-IQR50-C3/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S1W16-IQR50-C3?","answer":"The Stellaris family was discontinued without a direct drop-in replacement. A board redesign is required to migrate to a current MCU family such as the TM4C or MSP432 series."},{"question":"What is the LM3S1W16-IQR50-C3's core speed and memory?","answer":"The ARM Cortex-M3 core runs at 50 MHz."},{"question":"What compliance documentation is available for LM3S1W16-IQR50-C3?","answer":"The part is RoHS-compliant per Texas Instruments standard lead-free qualification. Standard TI compliance certificates are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1W16-IQR50-C3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1W16-IQR50-C3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:49:45.625Z","lastPublished":"2026-07-21T02:49:45.625Z","indexable":true}}