{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1138-EQC50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1138-EQC50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1138-EQC50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S1138-EQC50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series MCU, LM3S1138-EQC50-A2, 32-bit single-core, 50 MHz, 64 KB flash, 16 KB RAM, 100-LQFP, -40 to 105°C.","salesMarkdown":"## NRND status and sourcing posture Texas Instruments lists the LM3S1138-EQC50-A2 as NRND (Not Recommended for New Designs). This means the part remains available for existing production but is not intended for new design starts. For active BOM lines already qualified on this MCU, we source it to order against an RFQ through independent distribution channels. ## Core and memory budget Built around a 32-bit ARM Cortex-M3 core clocked at 50 MHz, this MCU delivers the processing headroom for control loops, protocol stacks, and sensor fusion in a single-cycle multiply-accumulate architecture. For a typical industrial protocol gateway or motor-control application, the 16 KB SRAM budget is tight; dynamic allocation should be profiled early. ## Package, supply, and temperature grade The exposed paddle on the underside provides a thermal path to the ground plane. Supply voltage is specified at 2.25 V to 2.75 V — a narrow window that demands a regulated rail within ±0.25 V. A 2.5 V LDO with 1% accuracy and 200 mV dropout covers the range with margin. 46 general-purpose I/O pins are available, with serial connectivity covering I²C, SPI, SSI, UART/USART, and IrDA — enough for a sensor hub aggregating multiple digital buses. The 8-channel 10-bit ADC handles basic analog inputs like potentiometer feedback or thermistor readings. On-chip brown-out detect, power-on reset, and watchdog timer provide the supervisory functions needed for unattended operation without an external supervisor IC.","metaTitle":"LM3S1138-EQC50-A2 TI Stellaris ARM Cortex-M3 MCU, 50 MHz","metaDescription":"Texas Instruments LM3S1138-EQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz, 64 KB flash, 16 KB RAM, 100-LQFP. NRND — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tray","RAM Size":"16K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, IrDA, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"46","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Not For New Designs","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1138","Program Memory Size":"64KB (64K 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":"$24.2027","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1138-EQC50-A2/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the LM3S1138-EQC50-A2?","answer":"The Stellaris family has been superseded by the Tiva C series, which uses a different pinout and requires a board layout change. For existing designs, the NRND status means the LM3S1138-EQC50-A2 is sourced through surplus and broker channels."},{"question":"What is the LM3S1138-EQC50-A2's core speed and memory?","answer":"The ARM Cortex-M3 core runs at 50 MHz. On-chip memory is 64 KB of flash and 16 KB of SRAM."},{"question":"How do I get current pricing and availability for the LM3S1138-EQC50-A2?","answer":"Submit an RFQ through this listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1138-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/LM3S1138-EQC50-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:40:03.663Z","lastPublished":"2026-07-21T02:40:03.663Z","indexable":true}}