{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S6637-EQC50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S6637-EQC50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S6637-EQC50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S6637-EQC50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 6000 series LM3S6637-EQC50-A2, 32-Bit Single-Core MCU, 50MHz, 128KB Flash, 32K x 8 RAM, Ethernet & serial connectivity, 100-LQFP, -40°C to 105°C.","salesMarkdown":"## 50 MHz Cortex-M3 — processing budget and bus margin The 50 MHz core speed, combined with the 32-bit ARM Cortex-M3 architecture, delivers a predictable 1.25 MIPS/MHz throughput. For a design handling a TCP/IP stack alongside real-time I/O, this means the firmware team needs to budget interrupt latency and context-switch overhead early — the 50 MHz ceiling is adequate for moderate-throughput Ethernet applications but leaves no headroom for heavy DSP or graphics. If the application code plus a lightweight IP stack exceeds 80 KB of Flash, or the data buffers consume more than 20 KB of RAM, the engineer should consider a higher-density sibling before committing the BOM. Pair it with an external PHY (e.g., DP83848) and a magnetics module. The 41 GPIOs remain available for parallel buses, discrete I/O, or additional serial channels after the Ethernet interface is wired. ## Peripherals and data conversion On-chip peripherals include brown-out detection, power-on reset, PWM outputs, and a watchdog timer — enough for standalone operation without external supervisory ICs. The 4-channel 10-bit ADC covers basic analog sensing (temperature, current, voltage monitoring) but is not suited for precision instrumentation or high-speed data acquisition. ## Obsolete — sourcing and replacement strategy The official lifecycle status is Obsolete. Texas Instruments has discontinued this exact order code, and no direct pin-compatible replacement is recorded in the available documentation.","metaTitle":"LM3S6637-EQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz","metaDescription":"LM3S6637-EQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz, 128KB Flash, 32KB RAM, Ethernet, -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":"Tray","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":"41","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":"LM3S6637","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/1298dacf3870a978fd7e568629380bf4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S6637-EQC50-A2/alternatives.json"},"ai":{"faq":[{"question":"Does LM3S6637-EQC50-A2 have Ethernet connectivity?","answer":"Yes, it integrates an Ethernet MAC controller, along with I²C, IrDA, Microwire, SPI, SSI, and UART/USART interfaces. An external PHY is required for the physical-layer connection."},{"question":"What is the closest pin-compatible alternative to LM3S6637-EQC50-A2?","answer":"The Stellaris M3S 6000 series includes other density and feature variants, but differences in Flash size, RAM, and peripheral count mean each requires a separate PCB layout and firmware port. A full datasheet comparison is needed to identify the best migration candidate for a given application."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S6637-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/LM3S6637-EQC50-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}