{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S6938-IQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S6938-IQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S6938-IQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S6938-IQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 6000 series, LM3S6938-IQC50-A2T, 32-bit single-core ARM Cortex-M3 at 50MHz, 256KB FLASH, 64KB RAM, 100-LQFP (14x14mm), Ethernet/I2C/SPI/UART, 8x10b ADC, -40°C to 85°C, 2.25V-2.75V.","salesMarkdown":"## What this Cortex-M3 brings to a networked control design The 8-channel 10-bit ADC and PWM timers cover local analog sensing and motor or valve actuation without an external companion chip. ## 50 MHz core with 256 KB Flash — memory headroom for protocol stacks The 50 MHz Cortex-M3 core delivers enough throughput to run a lightweight TCP/IP stack (lwIP or similar) while servicing UART and SPI peripherals without stalling. The 256 KB Flash holds a moderate application plus the Ethernet stack and bootloader; the 64 KB SRAM provides packet buffers and runtime data. Designs that need more heap for large packet queues or multiple protocol instances should budget memory carefully or look at higher-density siblings in the Stellaris 6000 series. ## 100-LQFP package — layout and assembly notes No special reflow profile beyond J-STD-020 is needed, but the exposed pad (if present on this variant) should be stitched to ground with thermal vias for adequate heat dissipation. The 38 available GPIOs leave enough pins for a parallel LCD or external memory bus alongside the serial interfaces. No last-time-buy window remains open through the factory channel. Stock is available only through independent distributors and surplus inventories. No official pin-compatible replacement has been announced by TI; any substitution requires a board redesign and firmware port.","metaTitle":"LM3S6938-IQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz","metaDescription":"Texas Instruments LM3S6938-IQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz, 256KB Flash, 64KB RAM, Ethernet, 100-LQFP, -40°C to 85°C.","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":"64K 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":"38","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":"LM3S6938","Program Memory Size":"256KB (256K 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":"$37.3664","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/beae9e94c842b58b378a83db5cdfe822.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S6938-IQC50-A2T/alternatives.json"},"ai":{"faq":[{"question":"Is LM3S6938-IQC50-A2T obsolete and what is the recommended replacement?","answer":"Yes, the LM3S6938-IQC50-A2T is officially obsolete per Texas Instruments. No direct pin-compatible replacement has been announced. A redesign using a current TI Cortex-M4 or TM4C series part, or a comparable MCU from another vendor, would be required to maintain Ethernet and serial connectivity."},{"question":"Does LM3S6938-IQC50-A2T support Ethernet and what are the communication interfaces?","answer":"Yes, it integrates an Ethernet MAC controller. Additional serial interfaces include I²C, IrDA, Microwire, SPI, SSI, and UART/USART, covering most industrial communication needs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S6938-IQC50-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/LM3S6938-IQC50-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}}