{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5791-IQC80-C0T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5791-IQC80-C0T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-C0T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5791-IQC80-C0T","rawCanonicalId":null},"summary":{"shortDescription":"Stellaris ARM Cortex-M3S 5000 MCU, LM3S5791-IQC80-C0T, 32-Bit Single-Core, 80MHz, 128KB (128K x 8) FLASH, 64K x 8 RAM, 72 I/O, 100-LQFP (14x14), -40°C~85°C, Tape & Reel.","salesMarkdown":"## 80 MHz ARM Cortex-M3 with USB OTG and dual CAN — what this part was designed for The LM3S5791-IQC80-C0T: It was built for applications that need a mix of USB OTG connectivity, dual CANbus, LINbus, and a 16-channel 10-bit ADC — typical in industrial gateways, automotive body controllers, and building-automation panels where one chip handles both the control loop and the communication stack. Any remaining stock in the channel is last-time-buy or surplus inventory. No guarantee of ongoing supply exists, so a pin-compatible drop-in would need evaluation for a redesign. ## 100-LQFP — rework and footprint notes The exposed pad is not present on LQFP — all thermal dissipation goes through the leads, so keep the copper pour under the part solid and use via stitching to the ground plane. Will it survive the hot air? Yes, at 260 °C peak with a preheat to 150 °C — just don't dwell more than 10 seconds on any one side. ## Supply and temperature grade Core supply is 1.08 V to 1.32 V — a narrow window that needs a clean regulated rail, not a direct battery feed.","metaTitle":"LM3S5791-IQC80-C0T Stellaris ARM Cortex-M3 MCU, 80 MHz","metaDescription":"LM3S5791-IQC80-C0T is an obsolete Stellaris ARM Cortex-M3 MCU with 80 MHz core, 128 KB Flash, 64 KB RAM, USB OTG, dual CAN, LIN.","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-C0T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5791-IQC80-C0T obsolete?","answer":"Yes, the LM3S5791-IQC80-C0T is officially Obsolete per the manufacturer. Texas Instruments has discontinued production with no announced successor."},{"question":"What is the replacement for LM3S5791-IQC80-C0T?","answer":"No official replacement order code is listed. A pin-compatible alternative within the Stellaris family may exist, but it would require checking the TI cross-reference tool or evaluating a different Cortex-M3 variant from the same series for a board redesign."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-C0T","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-C0T 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}}