{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1751-EQC50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1751-EQC50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1751-EQC50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S1751-EQC50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series MCU, LM3S1751-EQC50-A2, 32-bit single-core, 50MHz, 128KB Flash, 64KB RAM, 100-LQFP, -40°C to 105°C.","salesMarkdown":"Texas Instruments has marked the LM3S1751-EQC50-A2 as Obsolete. ## Core and memory — 50MHz Cortex-M3 with 128KB Flash Built around the ARM Cortex-M3 core running at 50MHz, this 32-bit single-core MCU delivers deterministic interrupt handling and a single-cycle multiply for control-loop firmware. The 128KB on-chip Flash and 64KB SRAM provide enough headroom for a moderate application stack plus a real-time OS footprint. The -40°C to 105°C operating range covers industrial and outdoor enclosures where the ambient temperature inside the panel can exceed 85°C. The 2.25V to 2.75V supply rail means a single 2.5V regulator powers the core and I/O — no separate 1.8V rail needed. ## Peripherals and I/O — 56 GPIOs with serial and analog The peripheral set includes I²C, SPI, SSI, UART/USART, and IrDA for sensor fusion, display interfaces, or fieldbus bridges. Four 10-bit ADC channels handle analog feedback from potentiometers, current shunts, or thermistors without an external converter. On-chip brown-out detect, POR, PWM, and a watchdog timer reduce external supervisor IC count. The internal oscillator saves a crystal BOM line for applications that tolerate ±1% accuracy over temperature.","metaTitle":"TI LM3S1751-EQC50-A2 ARM Cortex-M3 MCU, 50MHz, 128KB Flash","metaDescription":"Texas Instruments LM3S1751-EQC50-A2 Stellaris ARM Cortex-M3 MCU, 50MHz, 128KB Flash, 64KB RAM, -40 to 105°C. 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":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tray","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, IrDA, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"56","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"A/D 4x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1751","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~105°C(TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8d259102b4710400d95dede9403b7b03.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the LM3S1751-EQC50-A2 and get a price?","answer":"This obsolete MCU is sourced through independent distribution channels. Submit an RFQ with your target quantity; availability and current market pricing are confirmed at quote time."},{"question":"What is the closest pin-compatible alternative to the LM3S1751-EQC50-A2?","answer":"A functional replacement would require a board spin — the package, supply voltage, and peripheral set differ across the Stellaris family. Contact sourcing with your specific BOM requirements for cross-reference options."},{"question":"What is the LM3S1751-EQC50-A2's listed speed?","answer":"The core runs at 50MHz — this is the maximum clock from the internal oscillator or an external crystal. The Cortex-M3 pipeline executes most instructions in a single cycle at this speed, giving roughly 50 MIPS throughput."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1751-EQC50-A2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1751-EQC50-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:44:00.994Z","lastPublished":"2026-07-21T02:44:00.994Z","indexable":true}}