{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5B91-IQC80-C1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5B91-IQC80-C1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5B91-IQC80-C1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IQC80-C1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series LM3S5B91-IQC80-C1T, 32-bit MCU, 80MHz, 256KB Flash, 96KB SRAM, 72 I/O, USB OTG, CAN, 100-LQFP, -40°C to 85°C.","salesMarkdown":"This part carries an official lifecycle status of Obsolete. Date-code provenance matters here: stock that surfaces long after the EOL date should be verified for authenticity and moisture sensitivity (MSL) handling. ## Package and footprint — 100-LQFP Surface-mount only. The exposed paddle is not present on this package variant, so thermal management relies on the leadframe and airflow. For a rework technician: the 0.5 mm pitch calls for a fine-pitch soldering iron tip or a hot-air profile that avoids skewing adjacent leads. No BGA reball concerns here — this is a straightforward QFP rework.","metaTitle":"LM3S5B91-IQC80-C1T Stellaris ARM Cortex-M3 MCU, 80MHz","metaDescription":"LM3S5B91-IQC80-C1T is a 32-bit ARM Cortex-M3 MCU from the Stellaris 5000 series. 80MHz core, 256KB Flash, 96KB SRAM, 72 I/O, USB OTG, CAN.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"80MHz","Series":"Stellaris® ARM® Cortex®-M3S 5000","Package":"Tape & Reel (TR)","RAM Size":"96K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"72","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"A/D 16x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S5B91","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)":"1.08V ~ 1.32V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3e88c5185290e27121af79c38923d69f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IQC80-C1T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5B91-IQC80-C1T obsolete?","answer":"Yes, this part is officially listed as Obsolete. Texas Instruments has discontinued production, and no last-time-buy window is currently open through the factory channel."},{"question":"Can LM3S5B91-IQC80-C1T be used in new designs?","answer":"Not recommended. With an Obsolete lifecycle status, there is no guarantee of future supply. New designs should target an active, factory-supported MCU to avoid a supply-driven redesign later."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5B91-IQC80-C1T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S5B91-IQC80-C1T 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}}