{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S9781-IQC80-C5T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S9781-IQC80-C5T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S9781-IQC80-C5T","factsUrl":"https://icboms.com/api/mcp/products/LM3S9781-IQC80-C5T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 9000 series 32-bit MCU, LM3S9781-IQC80-C5T, 80 MHz core, 128 KB Flash, 64 KB RAM, 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 part does The LM3S9781-IQC80-C5T: 32-bit ARM Cortex-M3 MCU from the Stellaris 9000 series, clocked at 80 MHz. It carries 128 KB of Flash and 64 KB of RAM. ## 128 KB Flash and 64 KB RAM — memory budget for a control gateway The 128 KB program Flash and 64 KB SRAM are sized for a moderate firmware stack — a TCP/IP stack, CANopen or Modbus application layer, and a few hundred lines of control logic fit comfortably. The 64 KB RAM provides enough buffer space for Ethernet packet handling and a small data log. Designs requiring larger code or data sets (e.g., full web server with graphics) will need to step up to a higher-density sibling in the Stellaris family.","metaTitle":"Texas Instruments LM3S9781-IQC80-C5T Stellaris ARM Cortex-M3 MCU, 80 MHz","metaDescription":"LM3S9781-IQC80-C5T Stellaris ARM Cortex-M3 MCU, 80 MHz, 128 KB Flash, 64 KB RAM, Ethernet/CAN/USB OTG, -40°C to 85°C. Obsolete — sourced to order against RFQ.","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":"Tape & Reel (TR)","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/aa8e08acec168565ddfe0ed524320717.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S9781-IQC80-C5T/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for LM3S9781-IQC80-C5T?","answer":"We source this obsolete part to order against an RFQ. Submit a request for quote (RFQ) through this listing; availability and current pricing are confirmed at quote time."},{"question":"What is LM3S9781-IQC80-C5T's listed speed?","answer":"The core runs at 80 MHz, which is the maximum clock for this ARM Cortex-M3 device."},{"question":"What is the closest pin-compatible alternative to LM3S9781-IQC80-C5T?","answer":"No official pin-compatible replacement has been designated by Texas Instruments. Any substitution requires a design review and validation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S9781-IQC80-C5T","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-C5T 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}}