{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5791-IQC80-C1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5791-IQC80-C1","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-C1","factsUrl":"https://icboms.com/api/mcp/products/LM3S5791-IQC80-C1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series LM3S5791-IQC80-C1, 32-bit MCU, 80MHz, 128KB Flash, 64KB RAM, 72 I/O, CAN/USB OTG/Ethernet, 100-LQFP, -40°C to 85°C.","salesMarkdown":"## 80 MHz Cortex-M3 with industrial connectivity The LM3S5791-IQC80-C1: It carries a rich peripheral set including CAN, USB OTG, Ethernet, multiple UART/SPI/I²C interfaces, and a 16-channel 10-bit ADC — all in a 100-pin LQFP package. ## Obsolete — plan for last-time buy or replacement The LM3S5791-IQC80-C1 lifecycle status is Obsolete. ## Memory and peripheral fit for control applications The 72 general-purpose I/O pins and the EBI/EMI interface allow direct connection to external memory or parallel peripherals without a glue-logic CPLD. The internal oscillator reduces BOM count, though an external crystal may be preferred for CAN or USB timing accuracy. ## Supply rail and package notes Core supply is 1.08 V to 1.32 V — a dedicated rail is required, separate from the I/O supply. The part is surface-mount only, tray shipping.","metaTitle":"LM3S5791-IQC80-C1 Stellaris ARM Cortex-M3 MCU, 80MHz","metaDescription":"LM3S5791-IQC80-C1 Stellaris ARM Cortex-M3 MCU, 80MHz core, 128KB Flash, 64KB RAM, industrial temp -40°C to 85°C.","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-C1/alternatives.json"},"ai":{"faq":[{"question":"What is the programming interface for LM3S5791-IQC80-C1?","answer":"The LM3S5791 supports standard ARM Serial Wire Debug (SWD) and JTAG interfaces for programming and debugging. The SWD interface uses two pins (SWDIO and SWCLK) and stays alive even with the watchdog enabled."},{"question":"Can I use LM3S5791-IQC80-C1 in new designs?","answer":"Not recommended. Since the part is Obsolete, new designs should target an active replacement. The 80 MHz Cortex-M3 class with CAN, USB OTG, and Ethernet is well-served by current-generation MCUs from multiple vendors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-C1","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-C1 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}}