{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S328-IQN25-C2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S328-IQN25-C2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S328-IQN25-C2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S328-IQN25-C2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 300 series, LM3S328-IQN25-C2T, 32-bit MCU, 25MHz, 16KB Flash, 4KB RAM, 28 I/O, 48-LQFP, -40 to 85°C.","salesMarkdown":"## 48-LQFP footprint and board-fit The LM3S328-IQN25-C2T comes in a 48-LQFP package with a 7x7 mm body. That 0.5 mm pitch demands a controlled-impedance stack-up if any of the I²C or SPI lines run at full speed across a long trace — the 25 MHz core clock doesn't stress the layout, but the edge rates on the GPIOs can couple into adjacent signals if the return path is broken under the package. The internal oscillator means you can skip an external crystal for the core clock, but the UART/USART baud-rate accuracy depends on the internal RC tolerance — budget a ±2 % frequency error across temperature. ## NRND — what it means for a BOM line Texas Instruments lists the LM3S328-IQN25-C2T as NRND (Not Recommended for New Designs). That means the part is still orderable for existing production runs, but TI will not qualify it for new sockets — no new datasheet revisions, no extended temperature grades, no additional package variants. For a board already in production, the NRND flag is a supply-chain signal: the last-time-buy window could open at any time. The 48-LQFP footprint is common across the Stellaris 300 series, so a pin-compatible migration to a higher-memory sibling is possible without a board spin — but the exact replacement depends on the firmware memory map and peripheral set. ## Industrial temperature and supply rails The brown-out detect and POR reset the core if the supply dips below the threshold, so an external supervisor is optional unless you need a precise reset voltage or a manual reset button. The 8-channel 10-bit ADC samples at the rate set by the ADC clock derived from the 25 MHz system clock. The internal oscillator drives the ADC clock; if you need better than 10-bit accuracy at the full sample rate, an external reference on the VREF pin improves the INL. The 4 KB SRAM is enough for a small RTOS or a bare-metal state machine — the stack and heap must fit within that, so watch the linker script.","metaTitle":"Texas Instruments LM3S328-IQN25-C2T ARM Cortex-M3 MCU, 25MHz","metaDescription":"Texas Instruments LM3S328-IQN25-C2T Stellaris ARM Cortex-M3 MCU, 25MHz, 16KB Flash, 4KB RAM, 48-LQFP, -40 to 85°C. NRND status — sourced to 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":"25MHz","Series":"Stellaris® ARM® Cortex®-M3S 300","Package":"Tape & Reel (TR)","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":"28","Core Processor":"ARM® Cortex®-M3","Package / Case":"48-LQFP","Product Status":"Not For New Designs","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S328","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"48-LQFP (7x7)","Voltage - Supply (Vcc/Vdd)":"3V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.3867","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/47a181b8b99cd2b700efc344c2b6e241.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S328-IQN25-C2T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S328-IQN25-C2T?","answer":"The Stellaris ARM Cortex-M3S 300 series includes multiple 48-LQFP variants with higher Flash and RAM densities, but a direct replacement depends on the firmware memory footprint and peripheral set. A board-spin-free migration requires matching the 48-LQFP footprint and supply voltage — confirm the specific sibling's memory size and peripheral list against your application before committing."},{"question":"What compliance documentation does Texas Instruments provide for LM3S328-IQN25-C2T?","answer":"Texas Instruments provides RoHS and REACH compliance data for the LM3S328-IQN25-C2T as part of the standard documentation package. The part ships in Tape & Reel (TR) packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S328-IQN25-C2T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S328-IQN25-C2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:53:41.236Z","lastPublished":"2026-07-21T02:53:41.236Z","indexable":true}}