{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1N11-IQC50-C5","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1N11-IQC50-C5","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1N11-IQC50-C5","factsUrl":"https://icboms.com/api/mcp/products/LM3S1N11-IQC50-C5","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 Microcontroller, LM3S1N11-IQC50-C5, 32-Bit, 50MHz, 64KB Flash, 12K x 8 RAM, 67 I/O, 100-LQFP, -40°C to 85°C.","salesMarkdown":"## Obsolete Cortex-M3 — sourcing through surplus channels The LM3S1N11-IQC50-C5: This part is sourced through independent surplus channels; quantities are lot-specific and confirmed at RFQ. The Stellaris® ARM® Cortex®-M3S 1000 series was TI's first Cortex-M3 family, now a legacy design. For new designs, a pin-compatible alternative within the same package footprint is not documented — a board spin is likely required to migrate to a current-generation MCU. ## 50MHz Cortex-M3 core with 64KB flash ceiling The 50MHz ARM Cortex-M3 core delivers deterministic interrupt latency and Thumb-2 ISA density, but the flash wait-state profile sets the actual throughput ceiling — the 64KB program memory limits firmware image size to well under 64KB when the bootloader and HAL are accounted for. 12K x 8 RAM leaves roughly 4–6KB free after a minimal RTOS and stack — enough for a single control loop with moderate buffering, but tight for a GUI or multi-protocol stack. The 8-channel 10-bit ADC (A/D 8x10b) integrates analog sensor front-ends without an external converter, but the 10-bit resolution limits dynamic range for precision measurements — a 12-bit external ADC may be needed for 0.1% accuracy. ## Industrial temp grade and serial interface mix The 1.08V to 3.6V supply range allows single-rail battery or regulated 3.3V operation without a separate I/O voltage. Connectivity includes I²C, IrDA, LINbus, Microwire, SPI, SSI, and UART/USART — the LINbus and IrDA interfaces target automotive body electronics and infrared data links, respectively. The 67 I/O lines in the 100-LQFP (14x14 mm, 0.50 mm pitch) demand a 4-layer PCB for fan-out of the inner rows. On-chip peripherals include brown-out detect/reset, DMA, POR, PWM, and WDT — the watchdog timer and DMA controller offload the core for deterministic timing loops, while the PWM module drives motor control or LED dimming without software jitter.","metaTitle":"TI LM3S1N11-IQC50-C5 Cortex-M3 MCU, 50MHz, 64KB Flash","metaDescription":"Texas Instruments LM3S1N11-IQC50-C5 Stellaris ARM Cortex-M3 MCU, 50MHz, 64KB Flash, 12K RAM, 100-LQFP.","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":"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":"67","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1N11","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"1.08V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/382ae1f60fbe7febad9e9e5bf72a2bb6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1N11-IQC50-C5/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S1N11-IQC50-C5?","answer":"No pin-compatible alternative is documented by Texas Instruments for this Stellaris Cortex-M3S 1000 series device. A migration to a current-generation MCU (e.g., TM4C or MSP432 family) will require a PCB layout change due to different pinouts and package options."},{"question":"What compliance documentation does Texas Instruments provide for LM3S1N11-IQC50-C5?","answer":"Texas Instruments provides RoHS and REACH compliance documentation for the LM3S1N11-IQC50-C5 through its standard product compliance portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1N11-IQC50-C5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1N11-IQC50-C5 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:49:03.147Z","lastPublished":"2026-07-21T02:49:03.147Z","indexable":true}}