{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S8971-IBZ50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S8971-IBZ50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S8971-IBZ50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S8971-IBZ50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 8000 series MCU, LM3S8971-IBZ50-A2, 32-Bit Single-Core, 50MHz, 256KB Flash, 64K x 8 RAM, Ethernet, CANbus, 38 I/O, 108-LFBGA, -40°C~85°C.","salesMarkdown":"The LM3S8971-IBZ50-A2 is classified as obsolete by Texas Instruments. For production BOMs that cannot be redesigned, the only procurement path is through independent distribution — surplus, new-old-stock, or broker-channel inventory. Expect date-code spreads and condition grading (sealed reel vs. tray) to vary by lot; we verify original factory packaging where possible. The core runs at 50 MHz, which is the mid-range tier for Cortex-M3 devices. That clock rate handles most industrial control loops — motor commutation at a few kHz, Ethernet packet processing at 10/100 Mbps, and CAN message handling — without stalling. The 38 I/O pins, routed through the 108-ball BGA, give enough GPIO for parallel sensor interfaces and a parallel LCD bus if needed. ## Ethernet and CANbus — industrial networking on one chip This MCU integrates both Ethernet MAC and CANbus controllers, which is a distinguishing feature for a 50 MHz part. It also includes IrDA, SPI, SSI, UART/USART, Microwire, and QEI interfaces. The Ethernet port makes it a candidate for industrial gateways, remote I/O modules, and building-management controllers that need a single-chip network endpoint. The CANbus interface suits it for vehicle-bus or factory-floor device networks. The 8-channel 10-bit ADC covers basic analog sensing without an external converter. ## 108-ball BGA — footprint and rework considerations The package is a 108-ball LFBGA with a 10x10 mm body. The fine pitch means a multilayer PCB with microvia fanout is standard, and X-ray inspection is recommended after reflow. For rework, the BGA requires a pre-bake if the moisture-sealed tray has been open beyond the floor-life window.","metaTitle":"LM3S8971-IBZ50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz","metaDescription":"Texas Instruments LM3S8971-IBZ50-A2 is a 32-bit ARM Cortex-M3 MCU from the Stellaris series.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 8000","Package":"Tray","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"CANbus, Ethernet, IrDA, Microwire, QEI, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"38","Core Processor":"ARM® Cortex®-M3","Package / Case":"108-LFBGA","Product Status":"Obsolete","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S8971","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)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cdd7bbe714582b2ae380b4c04ebf9f5c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for LM3S8971-IBZ50-A2?","answer":"Texas Instruments has not published an official direct replacement for the LM3S8971-IBZ50-A2 within the Stellaris series. A pin-compatible alternative would require a full BOM review; the Stellaris family has been superseded by the TM4C and later ARM Cortex-M4F series, but those are not drop-in replacements due to different pinouts and peripheral maps."},{"question":"Does LM3S8971-IBZ50-A2 have Ethernet connectivity?","answer":"Yes, the LM3S8971-IBZ50-A2 integrates an Ethernet MAC controller as part of its connectivity block, along with CANbus, IrDA, SPI, SSI, UART/USART, Microwire, and QEI interfaces."},{"question":"What is LM3S8971-IBZ50-A2's listed speed?","answer":"The core processor runs at 50 MHz. It is a 32-bit ARM Cortex-M3 single-core device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S8971-IBZ50-A2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S8971-IBZ50-A2 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}}