{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5P31-IBZ80-C5","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5P31-IBZ80-C5","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5P31-IBZ80-C5","factsUrl":"https://icboms.com/api/mcp/products/LM3S5P31-IBZ80-C5","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series LM3S5P31-IBZ80-C5, 32-bit MCU, 80 MHz, 64 KB Flash, 24K x 8 SRAM, CANbus/USB/SPI/I²C, -40°C to 85°C, 108-LFBGA (10x10 mm).","salesMarkdown":"## 80 MHz — still enough for a control loop The LM3S5P31-IBZ80-C5: The 80 MHz core speed on this Cortex-M3 is not a headline number for marketing; it was the throughput that let a single MCU handle a 10 kHz current-control loop, a CANbus message every 500 µs, and a USB HID report all within the interrupt budget. The 67 general-purpose I/O pins and the 16-channel 10-bit ADC gave enough pad for sensor multiplexing without an external mux. If you are searching for a replacement, the 80 MHz clock and the peripheral list — especially CAN and USB — are the binding constraints, not the Flash density. TI's Stellaris line was folded into the Tiva-C family years ago; the official successor is not pin-compatible, so a board redesign is required. No last-time-buy window remains through the factory channel. ## 108-ball BGA — footprint reality The 108-LFBGA (10x10 mm body) is a 0.8 mm pitch ball grid array. The small ball diameter and tight pitch mean the PCB pad design and solder-paste stencil aperture are critical — this is not a package you hand-solder in rework without a proper stencil and reflow profile. The supply voltage is a narrow 1.08 V to 1.32 V core rail, so the board needs a clean 1.2 V regulator close to the BGA. If you are evaluating this part for a repair or a legacy BOM, verify that your board's decoupling and via pattern match the original layout — a drop-in swap from a different BGA footprint will fail.","metaTitle":"LM3S5P31-IBZ80-C5 Stellaris ARM Cortex-M3 MCU, 80 MHz","metaDescription":"Obsolete LM3S5P31-IBZ80-C5 32-bit MCU, 80 MHz Cortex-M3, 64 KB Flash, 24K x 8 SRAM, CAN/USB, -40°C to 85°C, 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 5000","Package":"Tray","RAM Size":"24K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB","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":"LM3S5P31","Program Memory Size":"64KB (64K 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/6eb0e448a2435bd671cb24636bc93dca.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5P31-IBZ80-C5/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5P31-IBZ80-C5 obsolete?","answer":"Yes, the LM3S5P31-IBZ80-C5 is listed as Obsolete. TI no longer manufactures this Stellaris device, and the last-time-buy window has closed. Sourcing is through the independent surplus and broker channel only."},{"question":"What is the replacement for LM3S5P31-IBZ80-C5?","answer":"There is no pin-compatible drop-in replacement from TI. The Tiva-C TM4C series is the architectural successor but uses a different package and pinout. A board redesign is required to move to an active Cortex-M4F part. For a like-for-like socket, the only option is sourcing the original LM3S5P31-IBZ80-C5 from independent distribution."},{"question":"Is LM3S5P31-IBZ80-C5 equivalent to any active Stellaris part?","answer":"No active Stellaris part is pin-compatible or electrically equivalent. The entire Stellaris line has been obsoleted by TI. The closest functional match in the Tiva-C family requires a PCB redesign and firmware port."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5P31-IBZ80-C5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S5P31-IBZ80-C5 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}}