{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1R21-IQC80-C5T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1R21-IQC80-C5T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1R21-IQC80-C5T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1R21-IQC80-C5T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series 32-bit MCU, LM3S1R21-IQC80-C5T, 80 MHz, 256KB Flash, 48K x 8 RAM, 100-LQFP, -40 to 85°C.","salesMarkdown":"The Texas Instruments LM3S1R21-IQC80-C5T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 1000 series, running at 80 MHz. The 100-LQFP package gives you 67 I/Os. 80 MHz core clock. 48 KB RAM supports an RTOS heap and communication buffers. ## Pin-compatible alternatives? The LM3S1R21 is in the Stellaris 1000 family with a 100-LQFP footprint. Another LM3S1xxx part with the same package and 80 MHz clock is a drop-in.","metaTitle":"LM3S1R21-IQC80-C5T Stellaris ARM Cortex-M3 MCU, 80 MHz, 256KB Flash","metaDescription":"LM3S1R21-IQC80-C5T is an obsolete Stellaris ARM Cortex-M3 MCU with 80 MHz core, 256KB Flash, 48KB RAM, industrial temp range. 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 1000","Package":"Tape & Reel (TR)","RAM Size":"48K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"EBI/EMI, I²C, IrDA, LINbus, Microwire, 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 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1R21","Program Memory Size":"256KB (256K 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 ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/680b67575fde816bac5358fa43a3c9cf.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1R21-IQC80-C5T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S1R21-IQC80-C5T?","answer":"Any Stellaris LM3S1xxx part in the same 100-LQFP package with the -IQC80 suffix is pin-compatible. The exact Flash and RAM density you need determines the best match; we can help identify it during the RFQ process."},{"question":"What is LM3S1R21-IQC80-C5T's listed speed?","answer":"The core runs at 80 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1R21-IQC80-C5T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1R21-IQC80-C5T 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}}