{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5K31-IQC80-C1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5K31-IQC80-C1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5K31-IQC80-C1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5K31-IQC80-C1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series, 32-bit single-core MCU LM3S5K31-IQC80-C1T, 80MHz, 128KB Flash, 24KB RAM, 67 I/O, CAN/I²C/SPI/UART/USB, 1.08V–1.32V supply, –40°C to 85°C, 100-LQFP, Tape & Reel.","salesMarkdown":"## 80 MHz Cortex-M3 with CAN and USB — a capable industrial MCU now at end-of-life The Texas Instruments Stellaris LM3S5K31-IQC80-C1T is a 32-bit ARM Cortex-M3 single-core microcontroller running at 80 MHz, with 128 KB of Flash program memory and 24 KB of SRAM. It integrates a rich set of peripherals including a 16-channel 10-bit ADC, CANbus, USB, I²C, SPI, UART, and a quadrature encoder interface, making it suited for industrial control, motor-drive nodes, and gateway applications that need both real-time control and connectivity. The device operates from a 1.08 V to 1.32 V core supply and is rated over the –40°C to 85°C industrial temperature range, housed in a 100-pin LQFP package. ## Lifecycle — officially obsolete; source through independent distribution Texas Instruments has marked the LM3S5K31-IQC80-C1T as obsolete. No factory last-time-buy window remains open. Sourcing now goes through independent distribution and surplus channels. No official TI successor has been designated for this order code. ## 80 MHz core — enough for control loops and protocol stacks The 80 MHz ARM Cortex-M3 core handles a motor-control FOC loop with headroom for a CANopen or Modbus RTU stack. The 24 KB SRAM is tight for large data buffers; designs that stream USB or log telemetry should budget RAM carefully. The 128 KB Flash holds a moderate-sized firmware image with room for a bootloader and field-update slot. ## Connectivity set — CAN, USB, and multiple serial interfaces The part includes CANbus, USB, I²C, SPI, UART, and a quadrature encoder interface. The 67 GPIOs leave room for parallel LCD interfaces or local switch/relay banks.","metaTitle":"Texas Instruments LM3S5K31-IQC80-C1T ARM Cortex-M3 MCU, 80MHz","metaDescription":"TI Stellaris LM3S5K31-IQC80-C1T 32-bit ARM Cortex-M3 MCU, 80MHz, 128KB Flash, 24KB RAM, CAN/USB/SPI, -40°C to 85°C, 100-LQFP. 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":"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-C1T/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy LM3S5K31-IQC80-C1T?","answer":"This part is sourced through independent distribution and surplus channels. Submit an RFQ for current pricing and availability; quotes are confirmed at order time."},{"question":"What is the operating temperature range of LM3S5K31-IQC80-C1T?","answer":"The device is rated for –40°C to 85°C, the industrial temperature grade."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5K31-IQC80-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-IQC80-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}}