{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S6633-EQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S6633-EQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S6633-EQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S6633-EQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 6000 series LM3S6633-EQC50-A2T, 32-bit single-core MCU, 50 MHz, 128 KB Flash, 32K x 8 RAM, Ethernet, I²C, SPI, UART, 41 I/O, 3×10-bit ADC, -40°C to 105°C, 100-LQFP.","salesMarkdown":"## 50 MHz Cortex-M3 — enough for moderate protocol stacks The 50 MHz core speed with the ARM Cortex-M3 pipeline handles a lightweight TCP/IP stack, Modbus TCP, or a basic RTOS scheduler without breaking a sweat. The 128 KB Flash ceiling means the application firmware plus the Ethernet stack needs to fit within that footprint — no room for a full-featured web server or large lookup tables. The 32K x 8 SRAM is adequate for packet buffers and a few kB of heap, but you will want to profile the stack's RAM usage early in the port. Any BOM line still specifying this MCU needs a replacement strategy before the remaining stock dries up. ## 100-pin LQFP — rework and inspection notes No exposed thermal pad — all heat dissipation goes through the leads and the PCB copper. MSL level is not in the record, but for an LQFP of this era assume MSL 3 unless a bake history is confirmed. The fine pitch (0.5 mm typical for 100-LQFP) needs a good solder paste stencil and a reflow profile with a soak zone to avoid tombstoning. Hand rework with hot air is feasible if the adjacent components are cleared. ## Supply voltage and power rail That 2.5 V nominal rail is tighter than the more common 3.3 V — a separate LDO or a 2.5 V tap from a POL converter is needed.","metaTitle":"LM3S6633-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz","metaDescription":"LM3S6633-EQC50-A2T is an obsolete Stellaris ARM Cortex-M3 MCU with 50 MHz core, 128 KB Flash, 32K x 8 RAM, Ethernet, industrial temp -40°C to 105°C, 100-LQFP.","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 3x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S6633","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/74dabdf1340c6d106493430f97a3738b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S6633-EQC50-A2T/alternatives.json"},"ai":{"faq":[{"question":"What is the direct replacement for LM3S6633-EQC50-A2T?","answer":"For a pin-compatible replacement, the closest candidate within the same Stellaris family would be another LM3S6633 variant with a different temperature or packaging suffix — verify the exact pinout against the datasheet before ordering. A full redesign may be needed to move to a current-production Cortex-M3 or Cortex-M4 part with Ethernet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S6633-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/LM3S6633-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}}