{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5K31-IBZ80-C3T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5K31-IBZ80-C3T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5K31-IBZ80-C3T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5K31-IBZ80-C3T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series, LM3S5K31-IBZ80-C3T, 32-bit MCU, 80MHz, 128KB Flash, 24KB SRAM, 67 I/O, 108-BGA, -40 to 85°C.","salesMarkdown":"The LM3S5K31-IBZ80-C3T: That memory split — 128 KB program space with 24 KB of working RAM — is sized for a single protocol stack plus a moderate application layer, not a full RTOS with multiple heavy stacks. The 67 GPIOs give headroom for a parallel LCD or a bank of sensors alongside the serial interfaces. ## Peripheral map — USB, CAN, and the serial mix Connectivity includes CANbus, I²C, SPI, SSI, UART/USART, IrDA, Microwire, QEI, and USB — a broad set that covers industrial fieldbus bridging (CAN to UART), motor-feedback reading (QEI for encoder position), and a USB device port for configuration or data logging. The 16-channel 10-bit ADC is adequate for monitoring analog sensors or potentiometer feedback, though the 10-bit resolution limits precision below 5 mV on a 5 V reference. ## 108-ball BGA — board-fit realities Housed in a 108-LFBGA (10x10 mm body), the 0.80 mm ball pitch demands a 4-layer PCB minimum for fan-out — two-layer boards will not route the inner balls. Texas Instruments has marked the LM3S5K31-IBZ80-C3T as obsolete. For a BOM line that already carries this order code, the procurement path is last-time-buy inventory or a board-spin to a current-generation Cortex-M4 or M7 part with a different pinout.","metaTitle":"Texas Instruments LM3S5K31-IBZ80-C3T MCU, 80MHz, 128KB Flash","metaDescription":"Texas Instruments LM3S5K31-IBZ80-C3T Stellaris ARM Cortex-M3 MCU, 80MHz, 128KB Flash, 24KB SRAM, 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":"Tape & Reel (TR)","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":"LM3S5K31","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)":"1.08V ~ 1.32V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ced2e58921dfaf5da21dc5dff9cf3a05.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5K31-IBZ80-C3T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the LM3S5K31-IBZ80-C3T?","answer":"No official pin-compatible successor is recorded from Texas Instruments. The Stellaris family has been superseded by the Tiva C series (TM4C123/129), but those parts use different package footprints and pin assignments — a board redesign is required."},{"question":"What is the LM3S5K31-IBZ80-C3T's core speed and memory?","answer":"The ARM Cortex-M3 core runs at 80 MHz. On-chip memory is 128 KB of Flash and 24 KB of SRAM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5K31-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/LM3S5K31-IBZ80-C3T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:55:19.681Z","lastPublished":"2026-07-21T02:55:19.681Z","indexable":true}}