{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5K31-IQC80-C0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5K31-IQC80-C0","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5K31-IQC80-C0","factsUrl":"https://icboms.com/api/mcp/products/LM3S5K31-IQC80-C0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series MCU, LM3S5K31-IQC80-C0, 32-Bit Single-Core, 80MHz, 128KB Flash, 24K x 8 RAM, 67 I/O, USB/CAN/I²C/SPI/UART, 1.08V~1.32V, -40°C~85°C, 100-LQFP, Tray.","salesMarkdown":"The LM3S5K31-IQC80-C0: The core runs from a 1.08 V to 1.32 V supply rail, which means a dedicated low-voltage regulator is required on the board — the same rail that powers the Cortex-M3 core on other Stellaris parts, so the power tree is familiar if you have designed with the family before. The 24 KB of SRAM handles a couple of moderate-sized data buffers and a RTOS kernel with a few tasks — plan the heap and stack allocation early in the firmware design. Sourcing is limited to the independent distribution market — surplus inventory, new-old-stock, and broker channels. There is no pin-compatible drop-in replacement announced by TI for this specific order code. ## Connectivity and peripherals — what the interfaces support The CAN 2.0B controller makes this MCU a natural fit for industrial automation nodes, motor drives, and automotive-adjacent control modules that communicate over a CAN bus. The USB interface (device or host, depending on the PHY) handles data logging or firmware updates through a USB stick. The QEI (quadrature encoder interface) directly decodes incremental encoder signals for closed-loop motor position feedback without external logic. The 16-channel 10-bit ADC samples analog sensors — thermistors, potentiometers, current shunts — at a resolution adequate for control loops that do not require 12-bit or higher precision. The 100-LQFP package is not hermetically sealed, so a conformal coating is recommended for humid or condensing environments.","metaTitle":"LM3S5K31-IQC80-C0 Texas Instruments Stellaris ARM Cortex-M3","metaDescription":"LM3S5K31-IQC80-C0 Stellaris ARM Cortex-M3 MCU, 80MHz, 128KB Flash, 24KB RAM, 67 I/O, USB/CAN, -40°C to 85°C, 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":"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":"100-LQFP","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":"100-LQFP (14x14)","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-IQC80-C0/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3S5K31-IQC80-C0?","answer":"There is no pin-compatible drop-in replacement announced by Texas Instruments. A design migration to a current-generation Cortex-M3 or Cortex-M4 MCU from TI or another vendor is recommended for new production."},{"question":"Where can I buy LM3S5K31-IQC80-C0 today?","answer":"Submit an RFQ through this listing to check current supply."},{"question":"What are the exact specs of LM3S5K31-IQC80-C0?","answer":"It has 67 I/O pins, a 16-channel 10-bit ADC, and connectivity including CAN, USB, I²C, SPI, UART, IrDA, LIN, and QEI."},{"question":"Can I still use LM3S5K31-IQC80-C0 in new designs?","answer":"Using an obsolete part in a new design carries supply risk. The part is not in production, so future replenishment depends on surplus market availability. For a new design, a current-production Cortex-M3 or Cortex-M4 MCU is a safer choice to avoid a future redesign when surplus stocks run dry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5K31-IQC80-C0","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-IQC80-C0 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}}