{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5B91-IBZ80-C3T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5B91-IBZ80-C3T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5B91-IBZ80-C3T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IBZ80-C3T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series 32-bit MCU, LM3S5B91-IBZ80-C3T, 80 MHz core, 256 KB Flash, 96 KB SRAM, 72 I/O, CAN, USB OTG, 108-BGA, -40 to 85°C.","salesMarkdown":"At 80 MHz the Cortex-M3 delivers enough throughput to run a real-time control loop (e.g., a field-oriented motor controller) alongside a protocol stack (CANopen, Modbus TCP) without an external co-processor. The 96 KB SRAM leaves headroom for a moderate RTOS heap and a few communication buffers — enough for a multi-axis drive or a small HMI panel, but not for heavy data logging or a full TCP/IP offload. ## Connectivity and I/O budget 72 general-purpose I/O pins are available, plus dedicated interfaces for CAN, USB OTG, I²C, SPI, UART, and an external bus (EBI/EMI). The 16-channel 10-bit ADC covers analog feedback.","metaTitle":"LM3S5B91-IBZ80-C3T Stellaris ARM Cortex-M3 MCU, 80 MHz, 256 KB Flash","metaDescription":"Obsolete LM3S5B91-IBZ80-C3T from TI's Stellaris ARM Cortex-M3S 5000 series. 80 MHz, 256 KB Flash, 96 KB SRAM, -40 to 85°C. Sourced to order against RFQ via independent distribution","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":"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/a2b797d18d5d06d739b4d9059d4921cd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IBZ80-C3T/alternatives.json"},"ai":{"faq":[{"question":"What is LM3S5B91-IBZ80-C3T's listed speed?","answer":"The core runs at 80 MHz, which is the headline performance rating for this Cortex-M3 MCU."},{"question":"What series does LM3S5B91-IBZ80-C3T belong to?","answer":"It is part of the Stellaris® ARM® Cortex®-M3S 5000 series from Texas Instruments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5B91-IBZ80-C3T","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-C3T 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}}