{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5D91-IBZ80-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5D91-IBZ80-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5D91-IBZ80-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5D91-IBZ80-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series LM3S5D91-IBZ80-A2T, 32-bit single-core MCU, 80 MHz, 512 KB Flash, 96 KB RAM, 72 I/O, CANbus/USB OTG/EBI/EMI, 108-LFBGA, -40 to 85 °C.","salesMarkdown":"The 80 MHz core with single-cycle multiply and hardware divide handles real-time control loops and protocol stacks without external memory. The 512 KB Flash is enough for a full TCP/IP stack plus application firmware; the 96 KB RAM supports moderate-sized data buffers. Designs that need more than 96 KB of working memory will require an external SRAM via the EBI/EMI interface. ## Connectivity and I/O — a single-chip gateway USB OTG, CAN, I²C, SPI, UART, and IrDA are on-chip. The 72 GPIOs in a 108-ball BGA leave room for a parallel LCD or external memory bus.","metaTitle":"LM3S5D91-IBZ80-A2T Stellaris ARM Cortex-M3 MCU, 80 MHz, 512 KB Flash","metaDescription":"Obsolete LM3S5D91-IBZ80-A2T from Texas Instruments' Stellaris series. 32-bit ARM Cortex-M3 at 80 MHz with 512 KB Flash, 96 KB RAM, USB OTG, CAN, and 72 I/O in 108-BGA. Sourced to o","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 16x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S5D91","Program Memory Size":"512KB (512K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"108-BGA (10x10)","Voltage - Supply (Vcc/Vdd)":"3V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5D91-IBZ80-A2T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5D91-IBZ80-A2T obsolete?","answer":"Yes, this part is officially obsolete and no longer in production. It must be sourced through surplus or broker channels."},{"question":"What is the replacement for LM3S5D91-IBZ80-A2T?","answer":"Texas Instruments has not designated a direct pin-compatible replacement for this exact BGA variant. Any substitution requires a design review of the new MCU's footprint, memory map, and peripheral set."},{"question":"Where can I buy LM3S5D91-IBZ80-A2T?","answer":"This obsolete part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a real-time sourcing check."},{"question":"What are the specifications of LM3S5D91-IBZ80-A2T?","answer":"It is a 32-bit ARM Cortex-M3 MCU running at 80 MHz with 512 KB Flash, 96 KB RAM, 72 I/O, USB OTG, CAN, and 16-channel 12-bit ADC in a 108-BGA package rated for -40 to 85 °C."},{"question":"Can LM3S5D91-IBZ80-A2T be used in new designs?","answer":"No, because the part is obsolete and not in production. New designs should select a current-production Cortex-M3 or Cortex-M4 MCU with similar peripheral integration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5D91-IBZ80-A2T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S5D91-IBZ80-A2T 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}}