{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5B91-IBZ80-C1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5B91-IBZ80-C1","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5B91-IBZ80-C1","factsUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IBZ80-C1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series microcontroller, LM3S5B91-IBZ80-C1, 80MHz, 256KB Flash, 96KB RAM, 108-BGA, -40°C to 85°C.","salesMarkdown":"The LM3S5B91-IBZ80-C1: This core speed, combined with a single-cycle multiply and hardware divide, delivers deterministic interrupt response suitable for real-time control loops in motor drives and industrial automation. The flash supports 100,000 write/erase cycles per sector, enabling field firmware updates over the product lifetime without external EEPROM for parameter storage. ## Peripheral set and connectivity options The device integrates a 16-channel, 10-bit analog-to-digital converter, along with PWM outputs, a quadrature encoder interface (QEI), and multiple serial interfaces: CAN, I²C, SPI, SSI, UART/USART, and USB OTG. This peripheral mix suits applications requiring both fieldbus communication and motor position feedback. 72 general-purpose I/O pins are available, many with programmable pull-up/pull-down and drive strength control. ## Package, supply, and temperature grade Housed in a 108-ball LFBGA package (10x10 mm body), the device requires a 4-layer or more PCB for fan-out of the fine-pitch BGA. The BGA package's MSL (Moisture Sensitivity Level) should be verified from the latest TI datasheet for proper bake and reflow profiles. ## Obsolete lifecycle — sourcing through independent channels Texas Instruments has classified the LM3S5B91-IBZ80-C1 as obsolete. The Stellaris family was acquired by TI and later phased out; no direct drop-in alternative exists from the original manufacturer. Quantities are lot-specific and confirmed at RFQ. Buyers should verify date codes and request inspection documentation (X-ray, decapsulation, electrical test) to mitigate counterfeit risk, as no factory warranty applies through non-authorized sources.","metaTitle":"Texas Instruments LM3S5B91-IBZ80-C1 ARM Cortex-M3 MCU, 80MHz","metaDescription":"Texas Instruments LM3S5B91-IBZ80-C1 Stellaris ARM Cortex-M3 MCU, 80MHz, 256KB Flash, 96KB RAM, 108-BGA. Obsolete — sourced to order against RFQ.","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":"96K 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":"LM3S5B91","Program Memory Size":"256KB (256K 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/3e88c5185290e27121af79c38923d69f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IBZ80-C1/alternatives.json"},"ai":{"faq":[{"question":"How can I order LM3S5B91-IBZ80-C1 or check availability?","answer":"Submit a request for current pricing and lot availability; quantities are confirmed at quote time."},{"question":"What is the closest pin-compatible alternative to LM3S5B91-IBZ80-C1?","answer":"The Stellaris family has been discontinued without a direct replacement; a board redesign using a current Cortex-M4 or M7 device would be required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5B91-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/LM3S5B91-IBZ80-C1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:55:07.228Z","lastPublished":"2026-07-21T02:55:07.228Z","indexable":true}}