{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5B91-IQC80-C0T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5B91-IQC80-C0T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5B91-IQC80-C0T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IQC80-C0T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 LM3S5B91-IQC80-C0T, 32-bit MCU, 80MHz, 256KB Flash, 96KB RAM, 100-LQFP, -40°C~85°C.","salesMarkdown":"## Stellaris Cortex-M3 with USB OTG and CAN — what you get The 16-channel 10-bit ADC and PWM timers suit motor control and sensor acquisition in industrial or automotive environments. ## 80 MHz core with 96 KB RAM — headroom for control loops The 80 MHz Cortex-M3 delivers around 1.25 DMIPS/MHz, enough for real-time control loops running field-oriented motor control or CANopen stacks. The 96 KB SRAM leaves room for multiple frame buffers and a modest RTOS heap; a firmware engineer can budget about 40 KB for application data after allocating 20 KB for comms stacks and 16 KB for DMA descriptors. No direct pin-compatible drop-in from TI exists under the same base number — the Stellaris line was folded into the Tiva C series, but the packages and peripheral maps differ. ## 100-LQFP — footprint and rework notes MSL 3 out of the bag — if the moisture barrier bag has been open longer than the floor-life window, bake at 125°C for 24 hours before reflow. The exposed paddle under the package is not present on LQFP; thermal dissipation relies on the leadframe and copper pours on the top layer.","metaTitle":"LM3S5B91-IQC80-C0T Stellaris ARM Cortex-M3 MCU, 80MHz","metaDescription":"LM3S5B91-IQC80-C0T is an obsolete Stellaris ARM Cortex-M3 MCU with 80MHz core, 256KB Flash, 96KB RAM, USB OTG, CAN.","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":"100-LQFP","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":"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/a2e326f4b9b6fe651cb2833b4adf0430.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5B91-IQC80-C0T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5B91-IQC80-C0T obsolete?","answer":"Yes. Texas Instruments lists the LM3S5B91-IQC80-C0T as obsolete. There is no direct pin-compatible replacement from TI under the same base number; the Stellaris line has been superseded by the Tiva C series with different peripheral maps."},{"question":"Can LM3S5B91 be used for new designs?","answer":"Not recommended. The part is obsolete; for new designs, consider a current-generation Cortex-M4 or M3 MCU from the Tiva C or STM32 families that offers pin compatibility assessment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5B91-IQC80-C0T","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-IQC80-C0T 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}}