{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S2139-EQC25-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S2139-EQC25-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S2139-EQC25-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S2139-EQC25-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 2000 MCU, LM3S2139-EQC25-A2, 32-Bit Single-Core, 25MHz, 64KB Flash, 16K x 8 RAM, 100-LQFP, -40°C~105°C.","salesMarkdown":"## Obsolete — what that means for your BOM The LM3S2139-EQC25-A2: Quantities are lot-specific; we confirm availability and pricing at RFQ time against your target quantity. ## Core and memory — what fits where The ARM® Cortex®-M3 core runs at 25 MHz — this is the instruction throughput ceiling for the single-cycle multiply and hardware divide. The 64 KB of on-chip Flash (64K x 8) and 16K x 8 SRAM set the application footprint: a modest RTOS with a CAN stack and a few peripheral drivers fits, but a full TCP/IP stack with a large buffer pool will strain the RAM budget. Program memory is Flash, not OTP or ROM — field firmware updates are possible over the CAN or UART bootloader, provided the update image fits within the 64 KB boundary. ## Peripherals and connectivity for control applications The on-chip peripheral set includes CANbus, I²C, SPI, SSI, UART/USART, and IrDA — enough serial interfaces to talk to a motor drive over CAN, log data over UART, and read a sensor over I²C simultaneously. The 56 general-purpose I/O pins are multiplexed with these serial functions, so the usable I/O count depends on which peripherals are enabled. A 4-channel 10-bit ADC is integrated for analog feedback — reading a potentiometer, a current-sense resistor, or a temperature sensor without an external converter. The internal oscillator saves a crystal on the BOM, though the accuracy is adequate for UART baud-rate generation, not for precision timing. Brown-out detect, POR, and a watchdog timer are built in — the MCU can reset itself on a supply dip or a firmware hang without external supervisor ICs. ## Package, supply, and temperature grade Housed in a 100-LQFP (14x14 mm) body with 0.5 mm pitch — a standard 4-layer board with via-in-pad is not required, but the fine pitch demands careful solder-paste stencil design and a clean reflow profile. The supplier device package is 100-LQFP (14x14). The I/O pins are not 5 V tolerant; level translation is needed if interfacing with 5 V logic or sensors.","metaTitle":"LM3S2139-EQC25-A2 Texas Instruments ARM Cortex-M3 MCU, 25MHz","metaDescription":"Texas Instruments LM3S2139-EQC25-A2 Stellaris ARM Cortex-M3 MCU, 25MHz, 64KB Flash, 16K 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":"25MHz","Series":"Stellaris® ARM® Cortex®-M3S 2000","Package":"Tray","RAM Size":"16K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"56","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"A/D 4x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S2139","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c1cdf722c5d87c271bdac9e2db61473c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S2139-EQC25-A2/alternatives.json"},"ai":{"faq":[{"question":"What is the LM3S2139-EQC25-A2's listed speed?","answer":"The core runs at 25 MHz. This is the maximum clock frequency for the ARM® Cortex®-M3 processor in this device."},{"question":"What compliance documentation does Texas Instruments provide for the LM3S2139-EQC25-A2?","answer":"Texas Instruments provides the datasheet, errata, and application notes for this device. RoHS and REACH compliance status is typically declared in the product drawing or the TI compliance portal — confirm at the time of ordering as documentation may vary by date code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S2139-EQC25-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/LM3S2139-EQC25-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:50:20.377Z","lastPublished":"2026-07-21T02:50:20.377Z","indexable":true}}