{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1138-IQC50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1138-IQC50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1138-IQC50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S1138-IQC50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 MCU, LM3S1138-IQC50-A2, 50 MHz, 64 KB Flash, 16 KB RAM, 100-LQFP, -40 to 85°C.","salesMarkdown":"## 50 MHz Cortex-M3 with 64 KB flash — memory and speed budget The LM3S1138-IQC50-A2 runs a 32-bit ARM Cortex-M3 core at 50 MHz. On-chip memory is 64 KB of flash and 16 KB of SRAM. For a firmware engineer, that flash budget holds a moderate application stack plus a RTOS kernel; the SRAM leaves room for a few hundred bytes of heap and stack after the HAL footprint. Supply voltage is 2.25 V to 2.75 V — a narrow range that demands a regulated rail, not a direct battery. ## NRND — last-time-buy window open Texas Instruments lists the LM3S1138-IQC50-A2 as NRND (Not Recommended for New Designs). Existing production runs and BOM lines can still be filled through independent distribution; new designs should migrate to an active Stellaris or Tiva-C series part. The MCU provides 46 general-purpose I/O lines and a peripheral set that includes I²C, SPI, SSI, UART/USART, and IrDA. An 8-channel 10-bit ADC handles slow analog inputs like temperature or potentiometer feedback. On-chip oscillators eliminate the external crystal for many applications. Built-in brown-out detect, POR, PWM, and watchdog timer cover supervisory and timing needs without external ICs. The 100-LQFP package (14x14 mm body) is a standard fine-pitch QFP — four-layer boards fan out the inner rows comfortably.","metaTitle":"TI LM3S1138-IQC50-A2 ARM Cortex-M3 MCU, 50 MHz, 64 KB Flash","metaDescription":"Texas Instruments LM3S1138-IQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz, 64 KB flash, 16 KB RAM, -40 to 85°C. NRND — 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~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$29.0217","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1138-IQC50-A2/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1138-IQC50-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-IQC50-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:40:22.048Z","lastPublished":"2026-07-21T02:40:22.048Z","indexable":true}}