{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1620-IQC25-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1620-IQC25-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1620-IQC25-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1620-IQC25-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3 MCU, LM3S1620-IQC25-A2T, 25MHz, 128KB Flash, 32KB RAM, 52 I/O, 100-LQFP, -40°C to +85°C, Tape & Reel.","salesMarkdown":"## Cortex-M3 core at 25 MHz — what the clock buys you The LM3S1620-IQC25-A2T: The ARM Cortex-M3 core runs at 25 MHz, delivering around 25 DMIPS — enough for real-time control loops, sensor fusion, and protocol bridging without an RTOS overhead penalty. The internal oscillator trims the BOM by one external crystal, though an external clock source can still be fed in for tighter timing. 128 KB of on-chip flash and 32 KB of SRAM (32K x 8) leave room for a moderate application stack plus a small RTOS kernel. The flash is single-cycle at 25 MHz up to the zero-wait-state boundary — the exact boundary depends on the flash controller's prefetch buffer, so profile the actual instruction-fetch stalls in your tightest loop. 52 general-purpose I/O lines in a 100-pin LQFP give plenty of headroom for parallel buses, keypad matrices, and discrete sensor inputs. The connectivity block includes I²C, SPI, SSI, UART/USART, IrDA, Microwire, and a quadrature encoder interface (QEI) — the QEI is useful for motor-speed feedback without a dedicated timer capture. On-chip peripherals include brown-out detect, POR, PWM, and a watchdog timer — the brown-out reset monitors the 2.25 V to 2.75 V supply rail and asserts reset before the core logic enters an undefined state. ## Temperature grade and environment The 100-LQFP (14x14 mm) package has a typical junction-to-ambient thermal resistance around 40°C/W — the 2.75 V max supply keeps the power dissipation low enough that no heatsink is needed in still air.","metaTitle":"LM3S1620-IQC25-A2T Cortex-M3 MCU, 25MHz, 128KB Flash, NRND","metaDescription":"Texas Instruments LM3S1620-IQC25-A2T, Stellaris Cortex-M3 MCU, 25MHz, 128KB Flash, 32KB RAM, 52 I/O, NRND. 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 1000","Package":"Tape & Reel (TR)","RAM Size":"32K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"52","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Not For New Designs","Data Converters":"-","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1620","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":"$15.3870","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1620-IQC25-A2T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S1620-IQC25-A2T?","answer":"The Stellaris family includes other Cortex-M3 parts in the same 100-LQFP footprint, but pin compatibility varies by peripheral mix and supply voltage — cross-reference the full pinout against the target part before committing a board spin."},{"question":"What is LM3S1620-IQC25-A2T's listed speed?","answer":"The core runs at 25 MHz, delivering roughly 25 DMIPS from the Cortex-M3 pipeline. The internal oscillator eliminates the external crystal, but an external clock source can still be used for applications that need tighter frequency tolerance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1620-IQC25-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/LM3S1620-IQC25-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:43:20.497Z","lastPublished":"2026-07-21T02:43:20.497Z","indexable":true}}