{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S300-EQN25-C2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S300-EQN25-C2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S300-EQN25-C2","factsUrl":"https://icboms.com/api/mcp/products/LM3S300-EQN25-C2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 300 32-Bit MCU, LM3S300-EQN25-C2, 25MHz, 16KB FLASH, 4K x 8 RAM, 48-LQFP, Tray.","salesMarkdown":"Texas Instruments has marked the LM3S300-EQN25-C2 as Obsolete. Sourcing now runs through independent distribution — surplus inventory, broker channels, and verified stock lots. ## Core and memory — what the 25 MHz buys Built around a 32-bit ARM Cortex-M3 core clocked at 25 MHz. This is a single-core MCU from the Stellaris® ARM® Cortex®-M3S 300 series. The 25 MHz ceiling suits control-loop and sensor-fusion tasks where throughput is moderate but deterministic — think motor commutation timing or serial protocol handling. Program memory is 16 KB of on-chip flash (16K x 8). Data RAM is 4K x 8. For a firmware engineer, the 16 KB flash limits the application to a compact RTOS or bare-metal scheduler with the HAL and stack included — no room for a full TCP/IP stack or large lookup tables. The 4 KB SRAM is the working memory ceiling; a 2 KB buffer plus 1 KB stack leaves about 1 KB for global variables. ## Peripherals and I/O — what connects Serial connectivity covers I²C, Microwire, SPI, SSI, and UART/USART. This set handles common sensor buses (I²C for temperature/humidity, SPI for ADCs or displays) and asynchronous links to radios or host controllers. The Microwire interface is a legacy SPI variant — useful when mating with older EEPROMs or codec parts that still use the 4-wire protocol. The 48-LQFP package (7x7 mm) gives a reasonable pin count for a mixed-signal board — enough for a keypad matrix, a few LED indicators, and the serial peripherals without multiplexing. On-chip peripherals include brown-out detect/reset, POR, PWM, and a watchdog timer. This industrial-grade span covers outdoor enclosures, engine-bay-adjacent electronics, and factory-floor controllers. The LM3S300-EQN25-C2 is supplied in a 48-LQFP package with a 7x7 mm body. The 0.50 mm pitch demands a 4-layer board for reliable fan-out of the inner rows — two-layer boards will struggle to route all 36 I/O plus power and ground without vias. The supplier device package is 48-LQFP (7x7). Mounting is surface-mount. Internal oscillator type is listed as Internal — no external crystal is required for the core clock, though the UART baud-rate accuracy may benefit from an external resonator if the internal RC tolerance drifts outside the ±2% window over temperature. ## Sourcing posture The LM3S300-EQN25-C2 is an obsolete Texas Instruments MCU. Sourcing is through independent distribution channels — surplus stock, broker lots, and verified inventory. Lead time and pricing are confirmed when the RFQ is placed against the specific quantity and date.","metaTitle":"Texas Instruments LM3S300-EQN25-C2 MCU, 25MHz, 16KB Flash","metaDescription":"Obsolete Stellaris ARM Cortex-M3 MCU, 25MHz, 16KB flash, 4KB RAM, 48-LQFP. Sourced to order against RFQ through independent distribution.","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 300","Package":"Tray","RAM Size":"4K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"36","Core Processor":"ARM® Cortex®-M3","Package / Case":"48-LQFP","Product Status":"Obsolete","Data Converters":"-","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S300","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~105°C(TA)","Supplier Device Package":"48-LQFP (7x7)","Voltage - Supply (Vcc/Vdd)":"3V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b0079ff5b3d77e4f86c3abfcf8857684.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LM3S300-EQN25-C2 and how do I get a price?","answer":"Sourced through independent distribution — surplus inventory, broker channels, and verified stock lots."},{"question":"What is the closest pin-compatible alternative to LM3S300-EQN25-C2 in this MCU family?","answer":"The LM3S300 is an obsolete Stellaris part with no direct drop-in replacement from Texas Instruments."},{"question":"What is LM3S300-EQN25-C2's listed speed?","answer":"25 MHz. This is the maximum core clock for the ARM Cortex-M3 processor in this device."},{"question":"What compliance documentation does Texas Instruments provide for LM3S300-EQN25-C2?","answer":"The evidence does not list specific compliance certifications (RoHS, REACH, UL, IEC) for this part number. Standard Texas Instruments MCU documentation is available through the base product number LM3S300."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S300-EQN25-C2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S300-EQN25-C2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:52:53.125Z","lastPublished":"2026-07-21T02:52:53.125Z","indexable":true}}