{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S9781-IQC80-C3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S9781-IQC80-C3","canonicalUrl":"https://icboms.com/texas-instruments/LM3S9781-IQC80-C3","factsUrl":"https://icboms.com/api/mcp/products/LM3S9781-IQC80-C3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 9000 series MCU, LM3S9781-IQC80-C3, 32-bit single-core at 80 MHz, 128 KB Flash, 64 KB SRAM, 65 I/O, Ethernet, CAN, USB OTG, 100-LQFP, -40°C to 85°C.","salesMarkdown":"## 80 MHz Cortex-M3 with Ethernet and CAN — what this MCU was built for The LM3S9781-IQC80-C3: 32-bit ARM Cortex-M3 MCU from the Stellaris 9000 series, running at 80 MHz with 128 KB Flash and 64 KB SRAM. Connectivity includes Ethernet, CAN, USB OTG, and multiple UART/SPI/I²C. ## 128 KB Flash — tight for Ethernet stacks 128 KB of program Flash is adequate for a lightweight TCP/IP stack plus a CANopen node, but leaves little room for a full web server or multiple protocol stacks simultaneously. Designs that pushed the StellarisWare library to its limits often hit the Flash ceiling and had to strip features or move to a higher-density sibling. The 64 KB SRAM is generous for a Cortex-M3 of this vintage, supporting moderate packet buffering without external memory. ## Obsolete — no official replacement listed","metaTitle":"LM3S9781-IQC80-C3 Stellaris ARM Cortex-M3 MCU, 80 MHz, 128 KB Flash","metaDescription":"Obsolete LM3S9781-IQC80-C3 32-bit ARM Cortex-M3 MCU. 80 MHz, 128 KB Flash, 64 KB SRAM, Ethernet + CAN + USB OTG. Sourced to order against RFQ through 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 9000","Package":"Tray","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, Ethernet, I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"65","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":"LM3S9781","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"1.235V ~ 1.365V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/972bca290a37c8a8302ef85575cdcc71.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S9781-IQC80-C3/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S9781-IQC80-C3 obsolete?","answer":"Yes, the LM3S9781-IQC80-C3 is obsolete with no last-time-buy window active. Sourcing is through surplus and independent distribution only."},{"question":"Where can I buy LM3S9781-IQC80-C3?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What are the specifications of LM3S9781-IQC80-C3?","answer":"Key specs: ARM Cortex-M3 at 80 MHz, 128 KB Flash, 64 KB SRAM, 65 GPIO, Ethernet MAC+PHY, CAN 2.0B, USB OTG, 16-channel 10-bit ADC, 100-LQFP, -40°C to 85°C, 1.235 V to 1.365 V core supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S9781-IQC80-C3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S9781-IQC80-C3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}