{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S6618-EQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S6618-EQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S6618-EQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S6618-EQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 6000 series LM3S6618-EQC50-A2T, 32-bit MCU, 50 MHz, 128 KB Flash, 32 KB RAM, Ethernet MAC+PHY, 100-LQFP, -40°C to 105°C.","salesMarkdown":"## What this Cortex-M3 brings to a BOM line Its standout feature is the integrated Ethernet MAC — a full 10/100 Mbit interface with dedicated DMA — which made it a go-to part for cost-sensitive networked controllers in industrial automation, building management, and serial-to-Ethernet gateway designs. The 100-pin LQFP package brings out 38 general-purpose I/O lines plus an 8-channel 10-bit ADC. ## 50 MHz core and Ethernet — what that means for a retrofit or repair The 50 MHz Cortex-M3 core delivers enough throughput to run a lightweight TCP/IP stack alongside application code, but the real differentiator is the integrated Ethernet MAC. This part was designed before the current generation of Cortex-M4 and M7 parts with integrated PHY; the LM3S6618 requires an external PHY chip (e.g., a DP83848) connected via the MII or RMII interface. If your existing BOM already carries that PHY, this MCU drops in without a MAC-layer redesign. This part carries an official obsolete status. Texas Instruments has ended production; there is no direct pin-compatible replacement from TI in the Stellaris family. The closest functional successor in the TI portfolio is the TM4C129 series (Cortex-M4F with integrated Ethernet MAC+PHY), but that requires a board layout change and firmware port. No last-time-buy window remains; procurement should verify date code freshness and plan for a one-time buy if the line has no planned redesign.","metaTitle":"LM3S6618-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz","metaDescription":"LM3S6618-EQC50-A2T Stellaris ARM Cortex-M3 MCU with 50 MHz core, 128 KB Flash, 32 KB RAM, integrated Ethernet MAC, industrial temp range -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":"32K 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":"38","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":"LM3S6618","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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9296efca73f44d4c74928e0cd74e010c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S6618-EQC50-A2T/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3S6618-EQC50-A2T?","answer":"There is no direct pin-compatible replacement from TI. For a drop-in replacement, search for surplus stock of the LM3S6618 or consider a Stellaris-family sibling like the LM3S6918, which shares the same core and peripheral set but may differ in RAM or package options."},{"question":"Can LM3S6618-EQC50-A2T be used with Ethernet?","answer":"Yes. The LM3S6618 integrates an Ethernet MAC supporting 10/100 Mbit with MII and RMII interfaces. The Ethernet controller includes dedicated DMA for efficient packet handling, making it suitable for industrial Ethernet gateways and networked control applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S6618-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/LM3S6618-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}}