{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5791-IBZ80-C5T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5791-IBZ80-C5T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5791-IBZ80-C5T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5791-IBZ80-C5T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series LM3S5791-IBZ80-C5T, 32-bit single-core MCU, 80 MHz, 128 KB Flash, 64K x 8 RAM, CANbus/USB OTG, 72 I/O, 108-BGA, -40 to 85°C.","salesMarkdown":"Any remaining stock in the channel is last-time-buy or surplus inventory. ## 80 MHz Cortex-M3 with a full peripheral set That core speed puts it in the mid-range tier of Cortex-M3 devices — enough for real-time control loops, protocol stacks, and moderate DSP without needing a Cortex-M4. The 16-channel 10-bit ADC covers analog sensing for current, voltage, or temperature monitoring. The 108-BGA package (10x10 mm) with 72 I/O is a dense footprint. ## Replacement reality — no pin-compatible drop-in There is no official pin-compatible replacement for the LM3S5791-IBZ80-C5T from Texas Instruments. The Stellaris family was migrated to the Tiva C series, but the package and pinout changed. A board redesign is required to use a current-production Cortex-M4 part like the TM4C123 or TM4C129. The closest functional match in the same footprint class would be another 108-BGA Cortex-M3 or M4 from a different vendor, but that means a new layout, firmware port, and re-qualification. For a repair or a short-run production line, sourcing the original part through independent channels is the practical path. Because the LM3S5791-IBZ80-C5T is obsolete, it is not stocked in volume by the manufacturer. Our sourcing desk can locate inventory across the independent and surplus distribution network — we quote against an RFQ with confirmed availability and current pricing. Expect to provide a target quantity and a date-code window if you have one. No lead-time number is available until we canvass the market; typical response is within one business day.","metaTitle":"LM3S5791-IBZ80-C5T Stellaris Cortex-M3 MCU, 80 MHz","metaDescription":"Texas Instruments LM3S5791-IBZ80-C5T 32-bit ARM Cortex-M3 MCU, 80 MHz, 128 KB Flash, 64 KB RAM, 72 I/O, -40 to 85°C. Request quote.","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":"108-LFBGA","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":"108-BGA (10x10)","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-IBZ80-C5T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5791-IBZ80-C5T obsolete?","answer":"Yes, the LM3S5791-IBZ80-C5T is listed as Obsolete. Texas Instruments has discontinued production, and no official successor part has been designated."},{"question":"Where can I buy LM3S5791-IBZ80-C5T?","answer":"The LM3S5791-IBZ80-C5T is available through independent distribution. Submit an RFQ — we source and quote to order with confirmed availability and current pricing at quote time."},{"question":"What is the best replacement for LM3S5791-IBZ80-C5T?","answer":"There is no pin-compatible drop-in replacement. A board redesign to a current-production Cortex-M4 such as the TM4C123 or TM4C129 series is the standard migration path."},{"question":"Does LM3S5791-IBZ80-C5T have a RoHS-compliant alternative?","answer":"The LM3S5791-IBZ80-C5T is the standard order code; no separate RoHS-compliant variant is listed in the record. The part is typically RoHS-compliant as manufactured, but verify the date code and certificate of compliance with your supplier."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5791-IBZ80-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-IBZ80-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}}