{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S8971-IBZ50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S8971-IBZ50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S8971-IBZ50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S8971-IBZ50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 8000 series LM3S8971-IBZ50-A2T, 32-Bit Single-Core MCU, 50MHz, 256KB Flash, 64K x 8 RAM, Ethernet + CAN, 38 I/O, 108-LFBGA, -40°C~85°C.","salesMarkdown":"## 50 MHz Cortex-M3 with Ethernet and CAN — what this part brings to a BOM It integrates both Ethernet MAC+PHY and CANbus controllers, making it a single-chip node for industrial gateways, motor-drive networks, or building-automation panels that need to bridge a fieldbus to an IP backbone. The 108-ball BGA (10x10 mm) keeps the footprint compact, and the 38 GPIOs plus a 10-bit 8-channel ADC cover local sensing and control without an external companion chip. Texas Instruments has formally discontinued the LM3S8971-IBZ50-A2T, so it is no longer available through the factory or authorized distribution channels. Any remaining stock in the independent supply chain is last-time-buy or surplus inventory. For sustainment programs that already have this MCU on the BOM, the procurement path is through brokers and independent distributors who can source new-old-stock or verified pulls. There is no official TI successor listed for this exact order code; a form-fit-function replacement would require a pin-compatible audit across the Stellaris family or a migration to a newer Cortex-M4/M7 part with Ethernet and CAN. ## 108-BGA — layout and rework notes The 108-ball LFBGA (10x10 mm body) uses a 0.8 mm pitch, which is manageable with standard SMT assembly but demands careful x-ray inspection for voiding and solder-joint integrity. The internal oscillator means a crystal is optional for the core clock, though Ethernet timing will still need an external 25 MHz reference. ## Peripheral set — Ethernet and CAN in one MCU The connectivity block includes CANbus, Ethernet, IrDA, Microwire, QEI, SPI, SSI, and UART/USART. Having both Ethernet and CAN on a single Cortex-M3 at 50 MHz is the standout feature — it eliminates a separate network coprocessor or FPGA for protocol bridging. The brown-out detect, POR, PWM, and watchdog peripherals cover the usual supervisory and motor-control needs. The 8-channel 10-bit ADC is adequate for current-sense or temperature feedback but not for precision analog acquisition; an external ADC would be needed for 12-bit or better resolution.","metaTitle":"LM3S8971-IBZ50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz","metaDescription":"LM3S8971-IBZ50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz, 256KB Flash, 64KB RAM, Ethernet + CAN, 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":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 8000","Package":"Tape & Reel (TR)","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":"Is LM3S8971-IBZ50-A2T obsolete?","answer":"Yes, the LM3S8971-IBZ50-A2T is listed as Obsolete. Texas Instruments has discontinued production, so new stock is only available through independent surplus or last-time-buy channels."},{"question":"What is the replacement for LM3S8971-IBZ50-A2T?","answer":"There is no official TI replacement order code for this exact part. A form-fit-function substitute would require evaluating pin-compatible Stellaris family variants or migrating to a newer Cortex-M4/M7 MCU with Ethernet and CAN peripherals."},{"question":"Does LM3S8971-IBZ50-A2T have Ethernet?","answer":"Yes, the LM3S8971-IBZ50-A2T includes an Ethernet controller as part of its connectivity block, alongside CANbus, SPI, UART, and other interfaces."},{"question":"Can LM3S8971-IBZ50-A2T be used with CAN bus?","answer":"Yes, CANbus is one of the listed connectivity peripherals on this MCU, making it suitable for automotive or industrial CAN networks."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S8971-IBZ50-A2T","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-A2T 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}}