{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1637-EQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1637-EQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1637-EQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1637-EQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series MCU, LM3S1637-EQC50-A2T, 32-Bit Single-Core, 50MHz, 128KB Flash, 32K x 8 SRAM, 100-LQFP, -40°C~105°C.","salesMarkdown":"## 50 MHz Cortex-M3 — what the speed buys you At 50 MHz, this core handles a single PID loop with encoder feedback at a few kHz update rate, or a Modbus RTU slave stack with a handful of digital I/O points. It is not a part for heavy DSP or Ethernet protocol processing — the 32 KB SRAM fills quickly with a TCP/IP stack. For a fixed-function controller that polls sensors and drives a PWM stage, the 50 MHz clock is adequate and the power draw stays low. ## Obsolete — sourcing reality for the BOM line Texas Instruments has marked the LM3S1637-EQC50-A2T as Obsolete. No production-status claim is made beyond the official Obsolete designation. ## No official replacement — what to do next There is no pin-compatible direct replacement from TI for this exact order code. The Stellaris family was migrated to the Tiva C series, but the package, supply voltage, and peripheral set differ. A redesign is the cleanest path for new production. For bridge supply on existing boards, we can search the surplus channel for the LM3S1637-EQC50-A2T or the broader LM3S1637 base number — quote against an RFQ with your target quantity and date window.","metaTitle":"LM3S1637-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz, 128 KB Flash","metaDescription":"LM3S1637-EQC50-A2T is an obsolete Stellaris ARM Cortex-M3 MCU from TI. 50 MHz core, 128 KB Flash, 32 KB SRAM, 43 I/O, -40 to 105°C. Sourced to order against RFQ. Request quote.","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 1000","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":"I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"43","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":"LM3S1637","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/99ee81b12912cebc4bb780a82de7e81e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LM3S1637-EQC50-A2T obsolete and still available to buy?","answer":"Yes, it is officially Obsolete per Texas Instruments. It is no longer in factory production, but it can be sourced through the independent surplus and broker channel. We source and quote it to order against an RFQ — availability and current pricing are confirmed at quote time."},{"question":"What is the replacement for LM3S1637-EQC50-A2T?","answer":"There is no pin-compatible direct replacement from TI. The Stellaris family was superseded by the Tiva C series, but those parts differ in package, supply voltage, and peripheral set. A board redesign is the recommended path for new production. For legacy BOM support, we can search surplus stock for the LM3S1637 base number."},{"question":"Where can I buy LM3S1637-EQC50-A2T with stock?","answer":"We source this obsolete MCU through our independent distribution network. Submit an RFQ with your target quantity and date window; we will confirm availability and pricing at quote time. No stock figures are published for this end-of-life part."},{"question":"What is LM3S1637-EQC50-A2T's listed speed?","answer":"The core runs at 50 MHz, which is adequate for single-loop control, Modbus RTU slave stacks, and sensor polling at moderate update rates."},{"question":"Can I use LM3S1637-EQC50-A2T in a new design?","answer":"Not recommended. The part is Obsolete with no factory production. A redesign using a current-generation Cortex-M3 or Cortex-M4 MCU is the standard approach for new BOMs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1637-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/LM3S1637-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}}