{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5B91-IQC80-C3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5B91-IQC80-C3","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5B91-IQC80-C3","factsUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IQC80-C3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series LM3S5B91-IQC80-C3, 32-bit single-core MCU, 80MHz, 256KB Flash, 96K x 8 SRAM, 72 I/O, CANbus/USB OTG, -40°C~85°C, 100-LQFP.","salesMarkdown":"The Texas Instruments LM3S5B91-IQC80-C3 is a 32-bit ARM Cortex-M3 MCU from the Stellaris 5000 series, clocked at 80 MHz with 256 KB of Flash program memory and 96 KB of SRAM. It carries CAN, USB OTG, multiple UART/USART, I²C, SPI, and SSI connectivity, plus a 16-channel 10-bit ADC. The 72 general-purpose I/O lines, combined with the EBI/EMI bus, allow direct attachment of external memory or parallel peripherals without a CPLD. The internal oscillator and brown-out detect circuitry reduce external BOM count in space-constrained designs. At 80 MHz, the Cortex-M3 pipeline delivers 96 KB of SRAM and a 16-channel 10-bit ADC.","metaTitle":"LM3S5B91-IQC80-C3 Stellaris ARM Cortex-M3 MCU, 80MHz","metaDescription":"LM3S5B91-IQC80-C3 is an obsolete Stellaris ARM Cortex-M3 MCU with 80MHz speed, 256KB Flash, 96KB SRAM, industrial temp. 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":"80MHz","Series":"Stellaris® ARM® Cortex®-M3S 5000","Package":"Tray","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/a2b797d18d5d06d739b4d9059d4921cd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IQC80-C3/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5B91-IQC80-C3 obsolete?","answer":"Yes, Texas Instruments has marked the LM3S5B91-IQC80-C3 as obsolete with no factory last-time-buy remaining. Supply is available through independent distribution channels."},{"question":"What is the best replacement for LM3S5B91-IQC80-C3?","answer":"A current-generation TI Tiva-C or TM4C series Cortex-M4F MCU in the same 100-LQFP package is the recommended migration path. The pinout and peripheral set differ, so a firmware port and board-level validation are required — no drop-in replacement exists."},{"question":"Where can I buy LM3S5B91-IQC80-C3?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for the real-time picture."},{"question":"What are the exact specifications of LM3S5B91-IQC80-C3?","answer":"The LM3S5B91-IQC80-C3 is a 32-bit ARM Cortex-M3 MCU running at 80 MHz with 256 KB Flash, 96 KB SRAM, 72 I/O, a 16-channel 10-bit ADC, and CAN/USB OTG connectivity, in a 100-LQFP package rated for -40°C to 85°C operation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5B91-IQC80-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/LM3S5B91-IQC80-C3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}