{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S8730-IBZ50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S8730-IBZ50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S8730-IBZ50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S8730-IBZ50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 8000 series, LM3S8730-IBZ50-A2T, 32-bit ARM Cortex-M3 single-core MCU at 50MHz, 128KB FLASH, 64KB SRAM, Ethernet + CANbus + I²C + SPI + UART/USART, 32 I/O, 108-LFBGA (10x10), tape-and-reel, -40°C to 85°C, 2.25V to 2.75V supply.","salesMarkdown":"The 108-ball BGA (10x10 mm) package keeps the footprint compact, but it is a fine-pitch part requiring controlled assembly and X-ray inspection. ## 50 MHz Cortex-M3 — where it sits in the performance stack The 32-bit single-cycle multiply and hardware divide handle the arithmetic that 8- or 16-bit MCUs struggle with. If your application needs more throughput, you would be looking at a 120 MHz+ Cortex-M4 or M7; if cost is the driver, a 48 MHz Cortex-M0+ might cover it. ## Memory sizing for the firmware engineer The Flash holds a TCP/IP stack plus a CANopen or Modbus application with room to spare; the SRAM gives enough headroom for a couple of Ethernet frames (around 1.5 KB each) and a modest RTOS heap. If your firmware image is already pushing 100 KB or your data buffers exceed 40 KB, you will be tight — consider whether the application can page or compress. ## Ethernet and CANbus on one die — the connectivity story Having both Ethernet and CANbus integrated is the standout feature of this Stellaris part. It saves a separate Ethernet controller chip and a CAN transceiver interface (though you still need the physical-layer transceivers). Typical applications include industrial gateways, programmable logic controllers, building-management controllers, and any design that bridges a fieldbus to an IP network. That means the board needs a 2.5 V regulator, and any 3.3 V I/O peripherals require level translation. Check your existing power tree before committing this part to a BOM. The Stellaris family was migrated to the Tiva™ C Series, but those parts use different package options and peripheral maps — a drop-in swap is not available. For a BOM that already qualifies this MCU, the only sourcing channel is the independent distribution market: new-old-stock, surplus, and verified broker inventory. ## BGA package — layout and assembly notes The 108-ball BGA on a 10x10 mm array is a 0.8 mm pitch part. That is not the finest pitch, but it still requires a multi-layer PCB with microvias or blind vias if you need to escape all balls on a tight board. The package is not hand-solderable; you need a reflow oven and X-ray inspection for joint verification.","metaTitle":"LM3S8730-IBZ50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz","metaDescription":"Texas Instruments LM3S8730-IBZ50-A2T 32-bit ARM Cortex-M3 MCU at 50MHz with 128KB FLASH, 64KB SRAM, Ethernet and CANbus.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"50MHz","title":"LM3S8730-IBZ50-A2T","Series":"Stellaris® ARM® Cortex®-M3S 8000","Package":"Tape & Reel (TR)","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"CANbus, Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"32","Core Processor":"ARM® Cortex®-M3","Package / Case":"108-LFBGA","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S8730","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)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Is LM3S8730-IBZ50-A2T obsolete?","answer":"Yes, Texas Instruments lists this part as Obsolete. There is no official successor with the same pinout and peripheral map. Sourcing is limited to the surplus and broker market."},{"question":"What is the replacement for LM3S8730-IBZ50-A2T?","answer":"No direct pin-compatible replacement is documented. TI migrated the Stellaris family to the Tiva C Series, but those devices differ in package, supply voltage, and peripheral integration. A redesign with a current-generation MCU is the practical path for new production."},{"question":"What is LM3S8730-IBZ50-A2T's listed speed?","answer":"The core runs at 50 MHz, based on the ARM Cortex-M3 architecture."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S8730-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/LM3S8730-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}}