{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5K31-IBZ80-C1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5K31-IBZ80-C1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5K31-IBZ80-C1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5K31-IBZ80-C1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series LM3S5K31-IBZ80-C1T, 32-bit single-core MCU, 80 MHz, 128 KB Flash, 24K x 8 RAM, 67 I/O, CAN/USB, 108-BGA (10x10), -40°C to 85°C.","salesMarkdown":"On the connectivity side it carries CAN, USB, UART/USART, SPI, I²C, IrDA, LIN, and Microwire, plus a quadrature encoder interface (QEI) for motor position feedback. The 67 general-purpose I/O lines and 16-channel 10-bit ADC give it the pin count for sensor aggregation and actuator drive in a single-chip bill of materials. The 80 MHz core clock on this ARM Cortex-M3 puts it in the mid-range of the Stellaris lineup — fast enough to handle a CANopen stack, a USB virtual COM port, and a PID loop on a single interrupt schedule without resorting to DMA for every transfer. The 24K x 8 SRAM is tight for a full RTOS heap with Ethernet buffering, but for a deterministic control application running bare-metal or a lightweight scheduler it fits. ## Industrial temperature and BGA footprint The 108-BGA package measures 10x10 mm, which saves board area compared to an LQFP but requires controlled impedance routing and X-ray inspection for solder-joint verification. The 1.08 V to 1.32 V core supply is lower than the 3.3 V I/O rail, so a separate regulator or a PMIC rail is needed; the brown-out detect and POR peripherals help sequence the core cleanly on power-up. If you are evaluating this for a new design, the absence of a factory-backed roadmap means a pin-compatible migration path should be planned from the start.","metaTitle":"LM3S5K31-IBZ80-C1T Stellaris ARM Cortex-M3 MCU, 80 MHz","metaDescription":"LM3S5K31-IBZ80-C1T is a 32-bit ARM Cortex-M3 MCU from the Stellaris 5000 series. 80 MHz core, 128 KB Flash, 24K x 8 RAM, 67 I/O, CAN/USB. Request quote.","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-C1T/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3S5K31-IBZ80-C1T?","answer":"The Stellaris family has been superseded by newer ARM Cortex-M portfolios from TI, but a direct pin-compatible drop-in is not documented. A design review is needed to identify a migration path."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5K31-IBZ80-C1T","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-C1T 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}}