{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S3749-IQC50-A0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S3749-IQC50-A0","canonicalUrl":"https://icboms.com/texas-instruments/LM3S3749-IQC50-A0","factsUrl":"https://icboms.com/api/mcp/products/LM3S3749-IQC50-A0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 3000 series, LM3S3749-IQC50-A0, 32-bit single-core MCU, 50 MHz, 128 KB Flash, 64 KB SRAM, 61 I/O, USB + UART + I2C + SPI + QEI, 100-LQFP, -40 to 85°C, 2.25 V to 2.75 V supply.","salesMarkdown":"## What this Cortex-M3 brings to the board The peripheral set includes USB, UART, I2C, SPI, SSI, IrDA, Microwire, QEI, and an 8-channel 10-bit ADC, plus a PWM module and DMA — enough to handle a motor-control loop, a human-machine interface, or a sensor hub without external glue logic. At 50 MHz the Cortex-M3 can execute a single-cycle multiply and a hardware divide, so a PID loop with 16-bit coefficients runs comfortably under 10 µs. The 64 KB SRAM leaves room for a double-buffered USB endpoint pool and a modest real-time OS heap. ## NRND — plan your BOM now That means TI is not actively marketing it for new projects, though it remains available through the distribution channel for existing production runs.","metaTitle":"LM3S3749-IQC50-A0 Stellaris ARM Cortex-M3 MCU, 50 MHz","metaDescription":"Texas Instruments LM3S3749-IQC50-A0 32-bit ARM Cortex-M3 MCU, 50 MHz, 128 KB Flash, 64 KB SRAM, 100-LQFP, -40 to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 3000","Package":"Tray","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART, USB","Mounting Type":"Surface Mount","Number of I/O":"61","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Not For New Designs","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S3749","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)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$23.4530","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/54dc75c8b8c4ac4918787aa9d2f409f1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S3749-IQC50-A0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S3749-IQC50-A0?","answer":"Within the Stellaris LM3S family, several 100-pin LQFP parts share the same footprint and supply voltage. The exact alternative depends on the Flash and peripheral mix you need. For a current-production recommendation, the TM4C123 series (Cortex-M4F) offers a superset of peripherals with a similar pinout — check the TM4C123GH6PM for a drop-in candidate with more Flash and a floating-point unit."},{"question":"What compliance documentation does TI provide for LM3S3749-IQC50-A0?","answer":"TI provides RoHS and REACH compliance declarations for this part. The device is lead-free and the 100-LQFP package is MSL 3. No UL or IEC certification is listed in the standard documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S3749-IQC50-A0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S3749-IQC50-A0 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}}