{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S2739-IQC50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S2739-IQC50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S2739-IQC50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S2739-IQC50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 2000 microcontroller, LM3S2739-IQC50-A2, 32-bit single-core, 50 MHz, 128 KB flash, 64 KB RAM, 100-LQFP, industrial temp.","salesMarkdown":"Texas Instruments lists the LM3S2739-IQC50-A2 as NRND (Not Recommended for New Designs). This means the part is still available for existing production but TI will not support it in new socket designs — a last-time-buy window is the typical next step, so existing BOM lines should plan a migration. ## Core and memory — flash budget and RAM headroom The ARM Cortex-M3 core runs at 50 MHz — enough throughput for a CAN-connected motor controller or a multi-protocol gateway aggregating I²C and SPI sensor buses. The 128 KB on-chip flash and 64 KB SRAM leave room for a real-time OS kernel plus the application stack; the 128 KB flash sector layout typically budgets 8–16 KB for a bootloader, leaving the rest for firmware. Program memory is FLASH type, field-upgradable via the bootloader if the firmware update strategy fits within the flash endurance (100 K erase/write cycles typical for the Stellaris family). The LM3S2739 integrates a CANbus controller, two I²C interfaces, two SPI/SSI ports, a UART/USART, plus IrDA and Microwire support — covering the common fieldbus and serial sensor links in a single chip. The Quadrature Encoder Interface (QEI) is useful for closed-loop motor position feedback without an external encoder counter. On-chip peripherals include brown-out detect, POR, PWM, and watchdog timer. The 4-channel 10-bit ADC samples at the internal oscillator rate; for higher precision or simultaneous sampling, an external ADC on the SPI bus is straightforward. 56 GPIO lines in the 100-LQFP package give enough headroom for a parallel LCD interface or a bank of opto-isolated inputs alongside the serial interfaces. The core and I/O share a single supply rail: 2.25 V to 2.75 V. This narrow window means the 2.5 V rail must be regulated — a standard 2.5 V LDO with 200 mV dropout works from a 3.3 V bus, but the headroom is tight. The internal oscillator eliminates the external crystal for the core clock, though the USB or CAN timing may still need an external resonator for accuracy.","metaTitle":"TI LM3S2739-IQC50-A2 Cortex-M3 MCU, 50 MHz, 128 KB Flash","metaDescription":"Texas Instruments LM3S2739-IQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz, 128 KB flash, 64 KB RAM, 100-LQFP. NRND — sourced to order. Request a quote.","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 2000","Package":"Tray","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"56","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Not For New Designs","Data Converters":"A/D 4x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S2739","Program Memory Size":"128KB (128K 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":"$22.6084","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e578ba8ea9aa738439f0d34e3213a748.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S2739-IQC50-A2/alternatives.json"},"ai":{"faq":[{"question":"How can I get pricing and availability for LM3S2739-IQC50-A2?","answer":"We source this part through independent distribution channels. No stock-holding claim is made here."},{"question":"What is the closest pin-compatible alternative to LM3S2739-IQC50-A2?","answer":"The Stellaris family includes higher-density parts (e.g., LM3S9xxx series with more flash and USB OTG), but those require a board spin — the package and pinout differ. For a drop-in replacement, check the LM3S2xxx siblings in the same 100-LQFP package; the peripheral mix varies by variant."},{"question":"What is the listed speed of LM3S2739-IQC50-A2?","answer":"The Cortex-M3 core runs at 50 MHz maximum. This is the nominal clock rate from the internal oscillator; the actual throughput depends on flash wait states and the bus matrix arbitration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S2739-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/LM3S2739-IQC50-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:51:46.953Z","lastPublished":"2026-07-21T02:51:46.953Z","indexable":true}}