{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S6637-EQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S6637-EQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S6637-EQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S6637-EQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 6000 series LM3S6637-EQC50-A2T, 32-bit single-core MCU, 50MHz, 128KB Flash, 32K x 8 SRAM, Ethernet + I²C + SPI + UART, 41 I/O, 100-LQFP, -40°C~105°C.","salesMarkdown":"## What this Stellaris MCU brings to a design It integrates an Ethernet MAC alongside I²C, SPI, SSI, UART, IrDA, and Microwire serial interfaces, plus a 4-channel 10-bit ADC and PWM timers. ## 50 MHz Cortex-M3 – enough for control and protocol stacks At 50 MHz the ARM Cortex-M3 core delivers around 1.25 DMIPS/MHz, so you get roughly 62.5 DMIPS. That is comfortable for running a lightweight TCP/IP stack (lwIP or uIP) while handling a motor-control loop or sensor polling. The 128 KB Flash holds a moderate application plus a bootloader; the 32 KB SRAM leaves room for Ethernet packet buffers and a modest heap. ## Ethernet MAC – the standout peripheral The integrated Ethernet MAC is the feature that sets this MCU apart from plain serial-interface parts. It supports 10/100 Mbps with MII/RMII, so you can connect a low-cost PHY (e.g., DP83848 or LAN8720) and get a node on an industrial network. The 41 GPIOs are enough to drive a small display, keypad, and status LEDs alongside the Ethernet interface. Just watch the pin sharing – the Ethernet RMII pins overlap with some GPIO and other peripherals, so check the pin assignment in the datasheet before committing the schematic. No new production is running; the only supply channel is surplus inventory and broker stock. If your BOM still calls out this exact order code, you will need to source through independent distribution. For a long-term production program, plan a migration to a current Stellaris or Tiva-C family part (pin-compatible options exist within the same 100-LQFP footprint). ## Package and footprint – 100-LQFP 14x14 mm It is a standard fine-pitch QFP – reworkable with a hot-air station but not a field-swap candidate without a controlled environment. Decouple with a 0.1 µF cap near each VDD/VSS pair and a bulk 10 µF on the board.","metaTitle":"LM3S6637-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz","metaDescription":"LM3S6637-EQC50-A2T is a 32-bit ARM Cortex-M3 MCU from the Stellaris 6000 series. Runs at 50MHz with 128KB Flash, 32KB SRAM, Ethernet MAC, industrial temp range.","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":"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-A2T/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement or equivalent for LM3S6637-EQC50-A2T?","answer":"Texas Instruments did not publish a direct drop-in replacement for this exact order code. Within the Stellaris 6000 series, other 100-LQFP parts with Ethernet MAC exist (e.g., LM3S6965, LM3S9B96), but pin compatibility and peripheral mix differ. Check the specific Stellaris family cross-reference guide for a migration path. For a current-production alternative, the Tiva-C TM4C129x series offers Ethernet + more memory in a similar package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S6637-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/LM3S6637-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}}