{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5G31-IQC80-A1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5G31-IQC80-A1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5G31-IQC80-A1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5G31-IQC80-A1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series LM3S5G31-IQC80-A1T, 32-Bit Single-Core MCU, 80MHz, 384KB Flash, 64K x 8 RAM, CANbus/EBI/EMI/I²C/SPI/UART, 67 I/O, 100-LQFP, -40°C~85°C.","salesMarkdown":"## 80 MHz Cortex-M3 with 384 KB Flash — what it was built for The LM3S5G31-IQC80-A1T: It was designed for industrial control, motor-drive, and gateway applications where the rich peripheral set — CAN, EBI/EMI, I²C, SPI, SSI, UART, IrDA, LIN, and QEI — handles multiple protocol domains without external bridge chips. The 16-channel 12-bit ADC and the DMA controller offload the core for deterministic data movement. For a production BOM that still calls out this exact code, the only channel is surplus or broker inventory — new-old-stock, pulled reels, or customer-return lots. The MSL rating and date-code freshness matter more here than for an active part, because older inventory may have sat past the floor-life window. Bake before reflow if the reel's moisture-barrier bag has been opened. ## Memory map and peripheral fit The Flash is 384 KB and the SRAM is 64 KB. The EBI/EMI interface can connect external memory for data-logging or display buffers. ## Sourcing reality for an obsolete part Because this MCU is obsolete, the usual franchised-distributor channel will not carry it. Sourcing goes through independent distributors who hold end-of-life inventory, customer excess, or broker-sourced reels. The price and availability fluctuate with remaining stock — expect a premium over the original list price, especially for full reels with consistent date codes. Counterfeit risk is elevated for high-volume MCUs in this lifecycle stage; a visual inspection and electrical verification (blank-check the Flash, exercise the JTAG/SWD port) should be part of the incoming QC for any lot. If the BOM can tolerate a board spin, migrating to a current-production Cortex-M4 or -M0+ part with similar peripheral mapping is the lower-risk long-term path.","metaTitle":"LM3S5G31-IQC80-A1T Stellaris Cortex-M3 MCU, 80 MHz","metaDescription":"LM3S5G31-IQC80-A1T is an obsolete Stellaris ARM Cortex-M3 MCU from TI. 80 MHz core, 384 KB Flash, 64 KB SRAM, industrial temp, 100-LQFP.","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":"100-LQFP","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":"100-LQFP (14x14)","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-IQC80-A1T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S5G31-IQC80-A1T obsolete?","answer":"Yes. The LM3S5G31-IQC80-A1T is listed as Obsolete by Texas Instruments. Production has ended and there is no official direct replacement from TI."},{"question":"Where can I buy LM3S5G31-IQC80-A1T?","answer":"Submit an RFQ to confirm current availability and pricing — quotes are provided on a per-order basis from available surplus inventory. No stock or price figures are published here because the supply is variable."},{"question":"What is the closest pin-compatible alternative to LM3S5G31-IQC80-A1T?","answer":"Within the Stellaris 5000 series, other LM3S5Gxx parts in the same 100-LQFP package share the same footprint and pinout. For example, the LM3S5G91 (with more Flash and SRAM) is a drop-in replacement at the board level, provided the firmware is recompiled for the larger memory map. No active-production equivalent exists from TI's current portfolio."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5G31-IQC80-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-IQC80-A1T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}