{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S6918-IQC50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S6918-IQC50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S6918-IQC50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S6918-IQC50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 6000 series LM3S6918-IQC50-A2, 32-bit MCU, 50 MHz, 256 KB Flash, 64 KB SRAM, Ethernet, I²C, SPI, UART, 8x10-bit ADC, 100-LQFP, -40 to 85°C.","salesMarkdown":"The 256 KB Flash is organized as 256K x 8 bits, enough for a TCP/IP stack (lwIP or uIP), an RTOS kernel, and application code. The 64 KB SRAM must accommodate two Ethernet frame buffers (about 3 KB each for a standard 1518-byte frame) plus stack and heap. If the application uses a web server with multiple simultaneous connections, the SRAM budget tightens — plan the buffer pool size early in firmware design. ## Supply rail: 2.5 V nominal — plan the regulator This is not a 3.3 V part; the board needs a dedicated 2.5 V LDO or buck converter. Any 3.3 V peripherals on the same PCB will require level shifters on the I/O lines. The 38 GPIOs are 2.5 V tolerant, not 5 V — check the absolute maximums before connecting to legacy 5 V logic. ## 100-LQFP footprint — layout notes for Ethernet The integrated Ethernet PHY differential pairs (TXP/TXN, RXP/RXN) must be routed with controlled impedance (100 Ω differential) and kept away from the 50 MHz crystal and switching regulator. The 14x14 mm body fits on a two-layer board, but a four-layer stack-up with a ground plane makes the Ethernet signal integrity much easier to close.","metaTitle":"Texas Instruments LM3S6918-IQC50-A2 ARM Cortex-M3 MCU","metaDescription":"Texas Instruments LM3S6918-IQC50-A2 Stellaris ARM Cortex-M3 32-bit MCU. 50 MHz core, 256 KB Flash, 64 KB SRAM, Ethernet MAC+PHY, 8x10-bit ADC, -40 to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 6000","Package":"Tray","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":"38","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Active","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S6918","Program Memory Size":"256KB (256K 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":"$55.2800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/513ab98429c8d221b314aeae12dda61f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S6918-IQC50-A2/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum operating frequency of the LM3S6918?","answer":"The LM3S6918-IQC50-A2 runs at 50 MHz. The Cortex-M3 core at this speed can sustain a full-duplex Ethernet throughput with careful interrupt prioritisation and DMA usage."},{"question":"What is the closest pin-compatible alternative to the LM3S6918?","answer":"Within the Stellaris 6000 family, the LM3S6965 and LM3S6918 share the same 100-LQFP footprint and peripheral set, but the 6918 includes the Ethernet PHY. For a drop-in replacement with Ethernet, the LM3S6918 is the only variant with the integrated PHY in this package. No exact second-source alternate from another manufacturer is listed on the official cross-reference."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S6918-IQC50-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/LM3S6918-IQC50-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}