{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5791-IQC80-B1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5791-IQC80-B1","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-B1","factsUrl":"https://icboms.com/api/mcp/products/LM3S5791-IQC80-B1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series LM3S5791-IQC80-, 32-bit ARM Cortex-M3 single-core MCU, 80MHz, 128KB FLASH, 64KB SRAM, 72 I/O, USB OTG, CAN, LIN, SPI, I²C, 100-LQFP, -40 to 85°C, tray.","salesMarkdown":"## 80 MHz Cortex-M3 with USB OTG and CAN — what the peripheral set means The LM3S5791-IQC80-B1: USB OTG (On-The-Go) lets the MCU act as either host or device, useful for data-logging pendrives or direct connection to a tablet for field diagnostics. Dual CAN 2.0 controllers support industrial and automotive networks alongside LIN and IrDA — a combination that reduces BOM count in multi-protocol gateway designs. The 16-channel 10-bit ADC samples at up to 1 Msps, adequate for current sensing and temperature monitoring in motor drives. ## Obsolete — sourcing path for sustainment programs The LM3S5791-IQC80- carries an Obsolete lifecycle status. TI has ended production; no last-time-buy window remains open. For existing designs already qualified on this MCU, the independent distribution channel is the practical sourcing route. No official TI successor has been published for this exact order code, so any replacement requires a full design review of pin-compatible Stellaris family options or a migration to a newer Cortex-M4 platform.","metaTitle":"Texas Instruments LM3S5791-IQC80-B1 ARM Cortex-M3 MCU, 80MHz","metaDescription":"Texas Instruments Stellaris LM3S5791-IQC80-B1 32-bit ARM Cortex-M3 MCU, 80MHz, 128KB Flash, 64KB SRAM, USB OTG, CAN, -40 to 85°C, 100-LQFP.","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-B1/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5791-IQC80- obsolete?","answer":"Yes, the LM3S5791-IQC80- is listed as Obsolete. Texas Instruments has discontinued production, and no last-time-buy window remains active."},{"question":"What is the replacement for LM3S5791-IQC80-?","answer":"TI has not published an official direct replacement for this exact order code. The Stellaris family includes pin-compatible variants with different memory and peripheral mixes, but any substitution requires reviewing the specific BOM requirements — flash size, SRAM, USB OTG, and CAN availability — against the remaining Stellaris portfolio or a migration to a newer Cortex-M4 series MCU."},{"question":"Where can I buy LM3S5791-IQC80-?","answer":"We source the LM3S5791-IQC80- through independent distribution channels. Submit an RFQ for current availability and pricing — quotes are confirmed at time of request."},{"question":"Can LM3S5791-IQC80- be used for USB OTG applications?","answer":"Yes, the LM3S5791-IQC80- includes a USB OTG controller, allowing it to operate as either a USB host or device. This makes it suitable for applications like direct connection to USB flash drives, keyboards, or host-to-PC communication without an external USB host chip."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5791-IQC80-B1","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-B1 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}}