{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5G31-IBZ80-A1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5G31-IBZ80-A1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5G31-IBZ80-A1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5G31-IBZ80-A1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series microcontroller, LM3S5G31-IBZ80-A1T, 80 MHz, 384 KB Flash, 64 KB RAM, 67 I/O, 108-LFBGA, Tape & Reel.","salesMarkdown":"## 80 MHz Cortex-M3 with 384 KB Flash — throughput and memory budget The LM3S5G31-IBZ80-A1T: The ARM Cortex-M3 core runs at 80 MHz — this sets the instruction throughput ceiling for control-loop tasks, protocol stack processing, and real-time interrupt response. The 384 KB on-chip Flash (384K x 8) accommodates a substantial firmware image including a real-time operating system, communication stacks, and application code, while the 64 KB SRAM (64K x 8) provides runtime heap and stack space for data buffers and state variables. With 67 general-purpose I/O lines available, the part can interface to a wide array of sensors, actuators, and external memory or peripherals without an external GPIO expander. ## Connectivity and analog integration — CAN, EBI, SPI, 16-ch ADC The peripheral set includes CANbus, EBI/EMI for external memory or FPGA interface, I²C, SPI, SSI, UART/USART, IrDA, LINbus, Microwire, and QEI — covering most industrial communication and motor-feedback protocols without external transceivers beyond the physical layer. A 16-channel 12-bit successive-approximation ADC is integrated, allowing direct connection of analog sensors (temperature, pressure, current) without an external converter — the 12-bit resolution is adequate for 0.1% measurement accuracy in most industrial applications. On-chip peripherals include DMA for memory-to-peripheral data movement without CPU intervention, PWM outputs for motor or power-stage control, a watchdog timer, brown-out detect, and POR — reducing the external component count for a reliable system reset and timing architecture. ## 108-BGA 10x10 mm — board-level integration The device is supplied in a 108-ball LFBGA package (10x10 mm body) — a fine-pitch BGA that requires a multi-layer PCB for fan-out of the inner ball rows. The 0.50 mm ball pitch demands careful via-in-pad or microvia design to route all 67 I/O plus power and ground balls without excessive layer count.","metaTitle":"TI LM3S5G31-IBZ80-A1T Cortex-M3 MCU, 80 MHz, 384 KB Flash","metaDescription":"Texas Instruments LM3S5G31-IBZ80-A1T Stellaris ARM Cortex-M3 MCU, 80 MHz, 384 KB Flash, 64 KB RAM, 67 I/O, 108-LFBGA. Obsolete — sourced to order against RFQ.","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":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART","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 16x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S5G31","Program Memory Size":"384KB (384K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"108-BGA (10x10)","Voltage - Supply (Vcc/Vdd)":"3V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5G31-IBZ80-A1T/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the LM3S5G31-IBZ80-A1T and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution — availability and current pricing confirmed at quote time. No live stock figure or price-per-unit is published on this listing; submit an RFQ to receive a quote from a distributor with access to independent channel inventory."},{"question":"What is the speed rating of the LM3S5G31-IBZ80-A1T?","answer":"The part is rated for 80MHz, driven by the on-chip ARM Cortex-M3 core with an internal oscillator as the primary clock source."},{"question":"What Stellaris series does the LM3S5G31-IBZ80-A1T belong to?","answer":"It is a member of the Stellaris ARM Cortex-M3S 5000 series, positioned above the value-line density tier with CAN/LIN/EBI connectivity and a 16-channel 12-bit A/D converter."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5G31-IBZ80-A1T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S5G31-IBZ80-A1T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:55:10.524Z","lastPublished":"2026-07-21T02:55:10.524Z","indexable":true}}