{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1620-IQC25-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1620-IQC25-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1620-IQC25-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S1620-IQC25-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 MCU, LM3S1620-IQC25-A2, 32-Bit Single-Core, 25MHz, 128KB Flash, 32K x 8 RAM, 100-LQFP, -40°C~85°C.","salesMarkdown":"## Obsolete — sourcing path for existing BOM lines The LM3S1620-IQC25-A2 is listed as Obsolete by Texas Instruments. For builds already qualified to this Stellaris ARM Cortex-M3 MCU, the only supply route is through independent surplus or broker channels — no last-time-buy window remains open. Any replacement will require a board-level respin and firmware migration to a current-generation Cortex-M3 or M4 device. ## Core architecture and on-chip memory Built around the ARM Cortex-M3 core running at 25 MHz, this 32-bit single-core MCU delivers deterministic interrupt handling and a single-cycle multiply for control-loop tasks. The 128 KB on-chip flash (128K x 8) and 32K x 8 SRAM provide enough code and data space for a moderate-sized application — a CANopen stack, sensor fusion, or a basic HMI — without external memory. On-chip peripherals include brown-out detect, POR, PWM, and a watchdog timer — enough to build a standalone controller without external supervisor ICs. Serial interfaces cover I²C, IrDA, Microwire, QEI, SPI, SSI, and UART/USART, so the part can talk to encoders, sensors, displays, and legacy fieldbuses from a single 52-I/O package. Housed in a 100-LQFP (14x14 mm body), the 0.5 mm pitch demands a 4-layer PCB for clean fan-out of the peripheral signals and power rails.","metaTitle":"LM3S1620-IQC25-A2 TI ARM Cortex-M3 MCU, 25MHz, 128KB Flash","metaDescription":"Texas Instruments LM3S1620-IQC25-A2 ARM Cortex-M3 MCU, 25MHz, 128KB Flash, 32KB SRAM, 100-LQFP. 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 1000","Package":"Tray","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":"$18.8578","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1620-IQC25-A2/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S1620-IQC25-A2?","answer":"No official pin-compatible replacement is listed by Texas Instruments. A board-level redesign with a current-generation ARM Cortex-M3 or M4 MCU is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1620-IQC25-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/LM3S1620-IQC25-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:43:04.974Z","lastPublished":"2026-07-21T02:43:04.974Z","indexable":true}}