{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S6911-EQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S6911-EQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S6911-EQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S6911-EQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 6000 series LM3S6911-EQC50-A2T, 32-bit MCU, 50MHz, 256KB Flash, 64KB SRAM, Ethernet MAC+PHY, 100-LQFP, -40°C to 105°C.","salesMarkdown":"## 50 MHz ARM Cortex-M3 with integrated Ethernet — what this chip is The 46 GPIOs in a 100-LQFP package give enough headroom for control panels and sensor aggregation boards. The LM3S6911-EQC50-A2T carries an official obsolete status. Texas Instruments ended production on the Stellaris line after the acquisition; no last-time-buy window remains open. If you're maintaining a legacy board that uses this part, the only channel is the independent surplus market. ## 256 KB Flash / 64 KB SRAM — memory budget for the design The 256 KB program Flash and 64 KB SRAM were generous for its era, enough to run a lightweight TCP/IP stack alongside a control loop. The 64 KB SRAM is shared between code data and Ethernet buffers — if your application pushes near that limit, a replacement with 128 KB or more SRAM gives breathing room. The Flash is not large by modern standards; firmware updates over Ethernet need careful sector management. ## Ethernet on-chip — the feature that defined it It supports 10/100 Mbps with an internal oscillator, so no external crystal for the Ethernet clock. If your replacement candidate lacks an internal PHY, budget for an external chip like the LAN8720 or KSZ8081 and the extra routing.","metaTitle":"LM3S6911-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz","metaDescription":"LM3S6911-EQC50-A2T Stellaris ARM Cortex-M3 MCU with 50MHz core, 256KB Flash, 64KB RAM, Ethernet, I2C, SPI, UART. Industrial temp -40°C to 105°C.","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 6000","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":"Ethernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"46","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"-","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S6911","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":"$6.6800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f0d1cd3dce82f535fc087498a0841b14.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S6911-EQC50-A2T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S6911 obsolete and what is the best replacement?","answer":"Yes, the LM3S6911-EQC50-A2T is officially obsolete. There is no pin-compatible drop-in replacement. The closest functional successor family is the TI TM4C12x series (Cortex-M4F), but it requires a firmware port and a PCB respin due to different supply voltage (3.3 V vs 2.5 V) and peripheral mapping. For a legacy repair, the surplus channel is the only option."},{"question":"Does LM3S6911 support Ethernet?","answer":"Yes, it integrates a 10/100 Ethernet MAC with an internal PHY, plus I2C, SPI, SSI, UART/USART, IrDA, and Microwire interfaces. No external PHY chip is needed for the Ethernet port."},{"question":"What is the exact speed and memory of LM3S6911?","answer":"The core runs at 50 MHz. Program memory is 256 KB Flash, SRAM is 64 KB. It is a 32-bit ARM Cortex-M3 single-core device."},{"question":"What package does LM3S6911 come in?","answer":"It is supplied in a 100-LQFP package (14x14 mm body), surface mount. The supplier device package is 100-LQFP (14x14). The tape and reel option is the A2T suffix."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S6911-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/LM3S6911-EQC50-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}