{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5951-IBZ80-C3T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5951-IBZ80-C3T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5951-IBZ80-C3T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5951-IBZ80-C3T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series 32-bit MCU, LM3S5951-IBZ80-C3T, 80 MHz, 256 KB flash, 64 KB SRAM, 108-ball BGA, -40 to 85 °C.","salesMarkdown":"## 80 MHz Cortex-M3 — throughput and memory budget The LM3S5951-IBZ80-C3T runs an ARM Cortex-M3 core at 80 MHz — this is the instruction throughput ceiling for control loops, protocol stacks, and real-time data processing. The 256 KB on-chip flash and 64 KB SRAM provide the code and data space for a moderate-complexity firmware image; a typical HAL plus RTOS footprint leaves roughly 40–50 KB SRAM for application buffers and stacks. The core operates from a 1.08–1.32 V supply rail — a narrow window that demands a regulated source. A 1.2 V LDO with ±2 % accuracy keeps the core inside spec across load steps. The 16-channel 10-bit ADC samples analog inputs at up to 1 Msps; the conversion clock and sample time are configurable per channel. ## Connectivity and peripheral set for industrial interfaces This MCU integrates CAN, USB OTG, I²C, SPI, SSI, UART/USART, IrDA, LIN, Microwire, and QEI — a connectivity suite that targets industrial gateways, motor-control feedback paths, and multi-protocol sensor hubs. The 67 general-purpose I/O lines map to the 108-ball BGA footprint; the ball-out groups the high-speed serial interfaces on the package periphery to simplify PCB fan-out. On-chip peripherals include a brown-out reset, power-on reset, DMA controller, I²S audio interface, PWM timers, and a watchdog timer. The internal oscillator eliminates an external crystal for applications that tolerate ±1 % accuracy over temperature; for USB operation a 12 MHz external crystal is still recommended. ## Obsolete — sourcing reality for BOM continuity Texas Instruments has classified the LM3S5951-IBZ80-C3T as obsolete. The Stellaris family (Cortex-M3S 5000 series) has been phased out; no pin-compatible drop-in replacement exists from TI or a second-source vendor. Procurement must source this part through independent distribution and surplus inventory channels. The 108-ball BGA package (10×10 mm) is moisture-sensitive; bake and reball procedures follow the MSL label on each reel. The 108-ball BGA (10×10 mm, 0.80 mm ball pitch) routes on a 4-layer board with via-in-pad or microvia fan-out under the centre balls. The core supply (1.08–1.32 V) and I/O supply (3.3 V typical) each need a dedicated power plane; the decoupling capacitor array sits within 5 mm of the BGA perimeter. The -40 to 85 °C industrial temperature grade covers factory-floor and outdoor enclosure environments without active cooling.","metaTitle":"LM3S5951-IBZ80-C3T Texas Instruments MCU, 80 MHz Cortex-M3","metaDescription":"Texas Instruments LM3S5951-IBZ80-C3T Stellaris ARM Cortex-M3 MCU, 80 MHz, 256 KB flash, 64 KB SRAM, 108-BGA. 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 5000","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, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"67","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":"LM3S5951","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)":"1.08V ~ 1.32V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d4b8f5fe4f034d9306544eb41e7eafcc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5951-IBZ80-C3T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S5951-IBZ80-C3T?","answer":"The Stellaris Cortex-M3S 5000 series is discontinued without a direct replacement. A functional replacement requires a board spin and firmware port."},{"question":"Where can I buy LM3S5951-IBZ80-C3T?","answer":"Sourced through independent distribution against an RFQ. Availability, pricing, and lot-level traceability are confirmed at quote time. Each unit is verified for authenticity and RoHS compliance before shipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5951-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/LM3S5951-IBZ80-C3T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:54:34.214Z","lastPublished":"2026-07-21T02:54:34.214Z","indexable":true}}