{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5791-IQC80-C5T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5791-IQC80-C5T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-C5T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5791-IQC80-C5T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series LM3S5791-IQC80-C5T, 32-bit MCU, 80 MHz, 128 KB Flash, 64 KB RAM, 72 I/O, USB OTG, CAN, 100-LQFP, -40°C to 85°C.","salesMarkdown":"## 80 MHz Cortex-M3 with industrial-grade peripherals The Texas Instruments LM3S5791-IQC80-C5T is a 32-bit ARM Cortex-M3 MCU from the Stellaris family, clocked at 80 MHz with 128 KB of Flash and 64 KB of RAM. This combination of core speed, memory, and connectivity makes it a fit for industrial control nodes, motor-drive communication bridges, and gateway applications that need to aggregate CAN and serial fieldbuses onto a USB host interface. The 80 MHz core clock on this Cortex-M3 supports a 3-stage pipeline. The 64 KB SRAM is organized as 64K x 8.","metaTitle":"Texas Instruments LM3S5791-IQC80-C5T ARM Cortex-M3 MCU, 80 MHz","metaDescription":"Obsolete Stellaris ARM Cortex-M3S 5000 MCU, 80 MHz, 128 KB Flash, 64 KB RAM, 72 I/O, USB OTG, CAN, 100-LQFP, -40°C 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":"Tape & Reel (TR)","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-C5T/alternatives.json"},"ai":{"faq":[{"question":"What is the direct replacement for LM3S5791-IQC80-C5T?","answer":"There is no direct pin-compatible replacement for the LM3S5791-IQC80-C5T. The Stellaris family was superseded by TI's Tiva C series (TM4C123/129), which uses a Cortex-M4 core in a different pinout. A board redesign is required to migrate to a current-generation MCU."},{"question":"Is LM3S5791-IQC80-C5T pin compatible with LM3S5790?","answer":"The LM3S5791 and LM3S5790 share the same 100-LQFP package and base pinout within the Stellaris family, but verify the specific peripheral and memory differences against the datasheet before assuming drop-in compatibility."},{"question":"Where can I buy LM3S5791-IQC80-C5T with stock?","answer":"The LM3S5791-IQC80-C5T is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time. Submit an RFQ for a real-time sourcing check on remaining inventory."},{"question":"What is LM3S5791-IQC80-C5T's listed speed?","answer":"The LM3S5791-IQC80-C5T is rated for an 80 MHz core clock on the ARM Cortex-M3 processor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-C5T","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-C5T 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}}