{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5791-IQC80-C3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5791-IQC80-C3","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-C3","factsUrl":"https://icboms.com/api/mcp/products/LM3S5791-IQC80-C3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series LM3S5791-IQC80-C3, 32-Bit Single-Core MCU, 80MHz, 128KB Flash, 64K x 8 RAM, 100-LQFP, -40°C~85°C.","salesMarkdown":"The LM3S5791-IQC80-C3: Stellaris ARM Cortex-M3 MCU clocked at 80 MHz, with 128 KB Flash and 64 KB RAM. Includes CAN, USB OTG, and 16-channel 10-bit ADC. Supply voltage is 1.08 V to 1.32 V. ## Obsolete — sourcing reality and what replaces it This part is marked obsolete. For new designs, consider current Stellaris series from TI. Verify pin-compatibility and supply voltage independently. ## What the 80 MHz and 128 KB Flash mean for fit 80 MHz core clock supports real-time control loops. 128 KB Flash holds a moderate application. The 64 KB RAM is generous for a Cortex-M3 of this vintage — it can hold a full USB descriptor table, a CAN message queue, and a few kilobytes of ADC buffer without paging. No external RAM needed for most sensor-fusion or gateway tasks. ## Peripherals and connectivity at a glance Ten bits suit current-sense or temperature monitoring.","metaTitle":"LM3S5791-IQC80-C3 Stellaris ARM Cortex-M3 MCU, 80MHz, 128KB Flash","metaDescription":"LM3S5791-IQC80-C3 is an obsolete Stellaris ARM Cortex-M3 MCU with 80MHz core, 128KB Flash, 64KB RAM, 16x10b ADC, CAN/USB OTG, -40 to 85°C. 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":"64K 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":"LM3S5791","Program Memory Size":"128KB (128K 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/603e2ee396c884705197257f18e9e4d3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5791-IQC80-C3/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3S5791-IQC80-C3?","answer":"No official replacement part number is listed in the lifecycle record. For new designs, consider the current Stellaris or TM4C series from TI, but verify pin-compatibility and supply voltage independently — no direct drop-in is documented."},{"question":"Where can I buy LM3S5791-IQC80-C3 available via RFQ confirmation?","answer":"We source the LM3S5791-IQC80-C3 to order against an RFQ through our independent distribution network. Availability and current pricing are confirmed at quote time — submit an RFQ for a real-time response."},{"question":"What is LM3S5791-IQC80-C3's listed speed?","answer":"The core runs at 80 MHz. That is the maximum clock for the ARM Cortex-M3 in this device, giving enough throughput for real-time control loops and protocol stacks."},{"question":"What is the datasheet for LM3S5791-IQC80-C3?","answer":"The datasheet is available from Texas Instruments under the base number LM3S5791. It covers the full register map, electrical characteristics, and application notes for the Stellaris 5000 series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5791-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/LM3S5791-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}}