{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S9B81-IBZ80-C5T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S9B81-IBZ80-C5T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S9B81-IBZ80-C5T","factsUrl":"https://icboms.com/api/mcp/products/LM3S9B81-IBZ80-C5T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 9000 series LM3S9B81-IBZ80-C5T, 32-bit single-core MCU, 80MHz, 256KB Flash, 96K x 8 RAM, 108-LFBGA, -40°C~85°C.","salesMarkdown":"The LM3S9B81-IBZ80-C5T is a Texas Instruments Stellaris series 32-bit ARM Cortex-M3 MCU clocked at 80 MHz. The 108-BGA (10x10 mm) package means visual inspection and X-ray verification are critical — date-code consistency and factory-original laser marking should be confirmed before accepting stock, especially for a mature, end-of-life part that may have been sitting in uncontrolled storage. ## 108-BGA package — footprint and rework notes The LM3S9B81-IBZ80-C5T is supplied in a 108-LFBGA package (10x10 mm body) with a 0.8 mm ball pitch typical of this density. Surface-mount only. For rework, the part is MSL 3 — a pre-bake at 125°C for 24 hours is mandatory if the moisture-barrier bag has been open beyond the floor-life window. The 1.235 V to 1.365 V core supply is tighter than the usual 3.3 V rail — a dedicated LDO or switching regulator for the 1.3 V core is needed, not a simple resistor divider.","metaTitle":"LM3S9B81-IBZ80-C5T Stellaris ARM Cortex-M3 MCU, 80MHz","metaDescription":"Obsolete LM3S9B81-IBZ80-C5T from Texas Instruments Stellaris series. 80MHz 32-bit ARM Cortex-M3, 256KB Flash, 96K x 8 RAM, 108-BGA.","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":"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, 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":"LM3S9B81","Program Memory Size":"256KB (256K 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/c3a792b175253b13fb798007e44fe44c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for LM3S9B81-IBZ80-C5T?","answer":"For an exact pin-compatible replacement, you would need to cross-reference the Stellaris family roadmap through Texas Instruments documentation. In the absence of a direct replacement, sourcing the original order code through independent distribution is the practical path."},{"question":"Can I use LM3S9B81 in a new design?","answer":"Given its obsolete status, a new design should target a current-production part from the Stellaris or TM4C family. The LM3S9B81-IBZ80-C5T is only suitable for sustaining an existing BOM where requalification is not feasible."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S9B81-IBZ80-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/LM3S9B81-IBZ80-C5T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}