{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S9781-IBZ80-C3T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S9781-IBZ80-C3T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S9781-IBZ80-C3T","factsUrl":"https://icboms.com/api/mcp/products/LM3S9781-IBZ80-C3T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 9000 series LM3S9781-IBZ80-C3T, 32-Bit Single-Core MCU, 80MHz, 128KB Flash, 64K x 8 RAM, 65 I/O, CANbus/Ethernet/USB OTG, 108-LFBGA, -40°C~85°C.","salesMarkdown":"The LM3S9781-IBZ80-C3T: With 128 KB of on-chip Flash and 64 KB of SRAM, this MCU fits firmware images for a TCP/IP stack with a small web server, a CANopen node, or a Modbus TCP gateway, but leaves limited headroom for large application logs or over-the-air staging buffers. The 64 KB RAM supports moderate packet buffering for Ethernet frames and CAN message queues without external memory. ## 108-BGA (10x10) — package and reflow considerations The 65 general-purpose I/O are distributed across the ball grid — the layout engineer needs the full footprint drawing to route the escape pattern. ## Supply rail: 1.235 V to 1.365 V core — a narrow window The core supply range of 1.235 V to 1.365 V is tight — the power rail needs a regulated LDO or switching regulator with tight tolerance. Brown-out detection and POR are integrated, but the board-level decoupling strategy must follow the recommended layout to keep ripple within this narrow window at 80 MHz operation.","metaTitle":"LM3S9781-IBZ80-C3T Stellaris ARM Cortex-M3 MCU, 80 MHz","metaDescription":"LM3S9781-IBZ80-C3T 32-bit ARM Cortex-M3 MCU from the Stellaris 9000 series. 80 MHz core, 128 KB Flash, 64 KB RAM, Ethernet & 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 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":"108-LFBGA","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":"108-BGA (10x10)","Voltage - Supply (Vcc/Vdd)":"1.235V ~ 1.365V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/972bca290a37c8a8302ef85575cdcc71.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LM3S9781-IBZ80-C3T obsolete?","answer":"Yes, the LM3S9781-IBZ80-C3T is listed as Obsolete. It is no longer manufactured by Texas Instruments and must be sourced through surplus or broker channels. No official replacement part number has been recorded for this device."},{"question":"What is the replacement for LM3S9781-IBZ80-C3T?","answer":"No official replacement order code is documented in the available lifecycle records. For a pin-compatible migration path within the Stellaris family, you would need to cross-reference the base product number LM3S9781 against TI's current Stellaris or Tiva C Series portfolio, but no direct drop-in successor is confirmed here. The part is sourced as-is through independent distribution for legacy BOM support."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S9781-IBZ80-C3T","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-IBZ80-C3T 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}}