{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1911-EQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1911-EQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1911-EQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1911-EQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series microcontroller, LM3S1911-EQC50-A2T, 32-bit single-core, 50MHz, 256KB Flash, 64K x 8 RAM, 100-LQFP.","salesMarkdown":"## Core specs and what they mean for a BOM line The LM3S1911-EQC50-A2T: On-chip memory: 256 KB of Flash (256K x 8) and 64K x 8 of SRAM. For a firmware image that fits in 256 KB, the 64 KB RAM leaves room for a moderate stack and data buffers — enough for a UART/I²C gateway or a sensor hub with a few hundred bytes of state. Operating temperature spans -40°C to 105°C — the industrial-plus band. A motor-drive controller or outdoor telemetry node that sees 85°C ambient still has 20°C of margin before the die hits the ceiling. The core and I/O share this single supply, so the regulator must hold within that window under load transients. 60 I/O lines are available in the 100-LQFP package — enough to interface a parallel LCD, a keypad matrix, and a few external ADCs without a port expander. Connectivity includes I²C, SPI, SSI, UART/USART, IrDA, and Microwire — covers the common serial buses for sensor and actuator interfaces. The SSI port can drive a synchronous serial ADC or DAC. On-chip peripherals: brown-out detect/reset, POR, PWM, and a watchdog timer. The brown-out reset protects against supply dips below the 2.25 V floor — useful in battery-backed or capacitor-fed applications. ## Lifecycle reality and sourcing Texas Instruments lists the LM3S1911-EQC50-A2T as obsolete. Sourced through independent distribution against an RFQ — availability and pricing confirmed at quote time. The 100-LQFP package (14x14 mm) is a standard footprint, so a board spin to a pin-compatible alternative would require a new layout if no direct drop-in exists.","metaTitle":"Texas Instruments LM3S1911-EQC50-A2T ARM Cortex-M3 MCU","metaDescription":"Texas Instruments LM3S1911-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz, 256KB Flash, 64Kx8 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":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tape & Reel (TR)","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":"60","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"-","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1911","Program Memory Size":"256KB (256K 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/76cedae791b8f19cc703d1f7efaf9731.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LM3S1911-EQC50-A2T and how is it quoted?","answer":"We source the LM3S1911-EQC50-A2T through independent distribution. Submit an RFQ for current availability and pricing — quantities are lot-specific and confirmed at quote time."},{"question":"What is the closest pin-compatible alternative to LM3S1911-EQC50-A2T?","answer":"No official pin-compatible successor is listed by Texas Instruments for this order code. A functional replacement would require a board layout change — the 100-LQFP footprint is standard, but the pinout and peripheral set differ across the Stellaris family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1911-EQC50-A2T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1911-EQC50-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:44:46.392Z","lastPublished":"2026-07-21T02:44:46.392Z","indexable":true}}