{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1538-EQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1538-EQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1538-EQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1538-EQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series 32-bit MCU, LM3S1538-EQC50-A2T, 50MHz, 96KB Flash, 64K x 8 RAM, 100-LQFP, -40°C to 105°C.","salesMarkdown":"## Core and memory — what the 50 MHz Cortex-M3 carries The LM3S1538-EQC50-A2T: The Cortex-M3 core delivers a balance of DSP-friendly instruction throughput and deterministic interrupt response — the 50 MHz ceiling is the practical limit for the flash wait-state profile, not the core itself. On-chip memory is split between 96 KB of program Flash (96K x 8) and 64 KB of SRAM (64K x 8). The 64 KB RAM leaves headroom for a moderate application stack plus a real-time OS footprint; the Flash is sized for control-loop firmware with a small bootloader partition. The connectivity block includes I²C, SPI, SSI, UART/USART, IrDA, and Microwire — covering most sensor and actuator bus requirements — plus a Quadrature Encoder Interface (QEI) for motor-feedback loops. On-chip peripherals include a brown-out detect/reset, POR, PWM outputs, and a watchdog timer. An 8-channel 10-bit ADC handles analog inputs without an external converter. Texas Instruments lists the LM3S1538-EQC50-A2T as Obsolete. For a BOM line that already carries this MPN, the only viable procurement channel is independent surplus and excess inventory. Each reel is lot-specific; traceability and date-code consistency are confirmed at quote time. No pin-compatible drop-in replacement exists from TI — a board spin is required to migrate to a current-generation MCU.","metaTitle":"LM3S1538-EQC50-A2T Texas Instruments ARM Cortex-M3 MCU","metaDescription":"Texas Instruments LM3S1538-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz, 96KB Flash, 64Kx8 RAM, -40 to 105°C. Obsolete — sourced to order against RFQ.","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":"64K 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 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1538","Program Memory Size":"96KB (96K 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/b26997997ffc52a8b9d6c51230a8bbb0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the LM3S1538-EQC50-A2T?","answer":"There is no official pin-compatible successor from Texas Instruments. The Stellaris family has been superseded by the Tiva C Series and SimpleLink MCUs, which use different package pinouts and peripheral maps. A board redesign is required for migration."},{"question":"What compliance documentation is available for the LM3S1538-EQC50-A2T?","answer":"Texas Instruments provides RoHS and REACH compliance data for this part through its standard documentation portal. The device is not AEC-Q100 qualified; it is rated for industrial temperature range only."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1538-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/LM3S1538-EQC50-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:42:21.627Z","lastPublished":"2026-07-21T02:42:21.627Z","indexable":true}}