{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5791-IBZ80-C1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5791-IBZ80-C1","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5791-IBZ80-C1","factsUrl":"https://icboms.com/api/mcp/products/LM3S5791-IBZ80-C1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series microcontroller, LM3S5791-IBZ80-C1, 32-bit single-core, 80MHz, 128KB flash, 64KB RAM, 108-LFBGA, -40°C to 85°C.","salesMarkdown":"## Obsolete Stellaris MCU — last-time-buy sourcing Texas Instruments has designated the LM3S5791-IBZ80-C1 as obsolete. Quantities are lot-specific and confirmed at RFQ — no stock-holding claim is made here. ## ARM Cortex-M3 at 80 MHz with 128 KB flash The LM3S5791-IBZ80-C1 is a 32-bit single-core ARM Cortex-M3 MCU running at 80 MHz. The 128 KB on-chip flash (128K x 8) and 64 KB SRAM (64K x 8) provide enough headroom for a moderate control stack plus a real-time OS footprint. ## Connectivity and peripheral set for industrial control Connectivity includes CANbus, USB OTG, multiple I²C and SPI/SSI channels, plus an external bus interface (EBI/EMI) for memory-mapped peripherals. The 72 general-purpose I/O lines suit a mid-complexity panel controller or motor-drive interface. On-chip peripherals include a 16-channel 10-bit ADC, PWM outputs, a quadrature encoder interface (QEI), and an I²S audio port. The DMA controller offloads data movement from the CPU core — useful for USB or CAN packet handling without stalling the control loop. The 108-ball LFBGA package (10x10 mm body) demands a multi-layer PCB for fan-out — the 0.80 mm ball pitch is manageable with standard via-in-pad processes.","metaTitle":"Texas Instruments LM3S5791-IBZ80-C1 ARM Cortex-M3 MCU, 80MHz","metaDescription":"Texas Instruments LM3S5791-IBZ80-C1 Stellaris ARM Cortex-M3 MCU, 80MHz, 128KB flash, 64KB RAM, 108-BGA.","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":"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-C1/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the LM3S5791-IBZ80-C1?","answer":"A board-level redesign would be required to migrate to a currently active Stellaris or Tiva-C series MCU. The LM3S5791 belongs to the Stellaris ARM Cortex-M3S 5000 family; other members of that family share the same core and peripheral architecture but differ in memory and package options."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5791-IBZ80-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-IBZ80-C1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:54:22.855Z","lastPublished":"2026-07-21T02:54:22.855Z","indexable":true}}