{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5D91-IQC80-A1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5D91-IQC80-A1","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5D91-IQC80-A1","factsUrl":"https://icboms.com/api/mcp/products/LM3S5D91-IQC80-A1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris LM3S5D91-IQC80-A1, ARM Cortex-M3 32-bit MCU, 80 MHz, 512 KB Flash, 96 KB RAM, dual CAN, USB OTG, 72 I/O, 100-LQFP, -40°C to 85°C, Tray.","salesMarkdown":"## 80 MHz Cortex-M3 — what the speed buys you 80 MHz core clock on this Cortex-M3. 96 KB RAM supports buffering for CAN and USB traffic. ## Obsolete — sourcing reality and what to do Texas Instruments has marked the LM3S5D91-IQC80-A1 as obsolete. No official TI successor listed.","metaTitle":"Texas Instruments LM3S5D91-IQC80-A1 ARM Cortex-M3 MCU, 80 MHz, 512 KB Flash","metaDescription":"Texas Instruments Stellaris LM3S5D91-IQC80-A1 ARM Cortex-M3 MCU, 80 MHz, 512 KB Flash, 96 KB RAM, dual CAN, USB OTG, 100-LQFP, -40°C to 85°C. Obsolete — sourced to order against RF","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":"100-LQFP","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":"100-LQFP (14x14)","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-IQC80-A1/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5D91-IQC80-A1 obsolete?","answer":"Yes, Texas Instruments has marked the LM3S5D91-IQC80-A1 as obsolete. No official successor part number is listed. For existing designs, the part can be sourced through independent distribution on an RFQ basis."},{"question":"What is a replacement for LM3S5D91-IQC80-A1?","answer":"No official TI replacement order code is documented in the available records. A pin-compatible alternative within the Stellaris family may exist, but it is not confirmed here. For new designs, consider migrating to a current TI Cortex-M4 or Cortex-M0+ MCU with similar peripheral set and 100-LQFP package."},{"question":"Where can I buy LM3S5D91-IQC80-A1?","answer":"This obsolete part is available through independent distribution channels. Submit an RFQ for current pricing and availability — quotes are confirmed at order time."},{"question":"What is LM3S5D91-IQC80-A1's listed speed?","answer":"The core is rated at 80 MHz, based on the ARM Cortex-M3 architecture."},{"question":"Does LM3S5D91 have a cross reference to another TI MCU?","answer":"No official cross-reference to another TI MCU is documented in the available records. The part is obsolete; verify pin compatibility with any potential substitute before ordering."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5D91-IQC80-A1","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-IQC80-A1 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}}