{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1B21-IQC80-C5","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1B21-IQC80-C5","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1B21-IQC80-C5","factsUrl":"https://icboms.com/api/mcp/products/LM3S1B21-IQC80-C5","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series microcontroller, LM3S1B21-IQC80-C5, 32-bit, 80MHz, 256KB Flash, 96KB RAM, 100-LQFP.","salesMarkdown":"## Core and memory configuration The LM3S1B21-IQC80-C5: Built around the ARM Cortex-M3 core, this 32-bit single-core MCU runs at 80 MHz. The 80 MHz clock rate sets the instruction throughput ceiling for control loops and protocol processing — the Cortex-M3 pipeline executes most instructions in a single cycle, so the effective MIPS rate is close to the clock speed for register-based operations. On-chip memory comprises 256 KB of Flash (256K x 8) for program storage and 96 KB of SRAM (96K x 8) for data. The 256 KB Flash is sufficient for a moderate application stack including a real-time OS, communication stacks, and application code; the 96 KB SRAM provides headroom for data buffers and stack space without external memory. ## Package, temperature, and supply voltage Housed in a 100-pin LQFP package (100-LQFP) with a 14x14 mm body. ## Peripherals and connectivity The device integrates a rich set of serial interfaces: I²C, SPI, SSI, UART/USART, IrDA, LINbus, and Microwire. The EBI/EMI interface allows connection to external memory or parallel peripherals, expanding the system beyond the on-chip resources. An 8-channel, 10-bit ADC handles analog sensor inputs. On-chip peripherals include brown-out detect/reset, DMA, POR, PWM, and a watchdog timer. The DMA controller offloads the CPU for data transfers between peripherals and memory, improving throughput in data-intensive applications like motor control or communication gateways.","metaTitle":"Texas Instruments LM3S1B21-IQC80-C5 ARM Cortex-M3 MCU, 80MHz","metaDescription":"Texas Instruments LM3S1B21-IQC80-C5 Stellaris ARM Cortex-M3 MCU, 80MHz, 256KB Flash, 96KB RAM, 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 1000","Package":"Tray","RAM Size":"96K 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":"LM3S1B21","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":"$7.4800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5a682c061d806b177dc245e9bb945319.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1B21-IQC80-C5/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1B21-IQC80-C5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1B21-IQC80-C5 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:46:36.461Z","lastPublished":"2026-07-21T02:46:36.461Z","indexable":true}}