{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1918-IQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1918-IQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1918-IQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1918-IQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series MCU, LM3S1918-IQC50-A2T, 50MHz, 256KB Flash, 64K x 8 RAM, 100-LQFP, -40°C~85°C.","salesMarkdown":"## What the 50 MHz core and 256 KB flash mean for a BOM line The LM3S1918-IQC50-A2T: The ARM Cortex-M3 core runs at 50 MHz with a single-cycle multiply and hardware divide — the 1.25 MIPS/MHz throughput means the CPU delivers roughly 62.5 MIPS without the branch-penalty overhead of an older ARM7TDMI. The 256 KB on-chip flash is organized as 256K x 8, enough for a moderate control stack plus a bootloader, with the 64K x 8 SRAM leaving headroom for data buffers and the RTOS heap. ## Lifecycle reality — NRND and what that means for procurement Texas Instruments lists the LM3S1918-IQC50-A2T as NRND (Not Recommended for New Designs). The part is still orderable for existing production, but TI has flagged it for end-of-life — no official last-time-buy date is published in this record, so the window for volume commitments is narrowing. New designs should migrate to a current Stellaris or Tiva-C series part with a compatible pinout and peripheral set. The 100-LQFP (14x14 mm) package footprint is standard across the Stellaris LM3S family, so a pin-compatible drop-in from the same series may exist — confirm the exact memory and peripheral map against the BOM before substituting. 52 general-purpose I/O lines are brought out, with the ADC inputs shared on Ports B and D. The internal brown-out detect and POR eliminate an external supervisor for most applications, but the WDT needs a service window in firmware to avoid spurious resets during long loops. ## Connectivity and peripherals — what is on the bus The IrDA module supports line-of-sight optical links up to 1 m at 115.2 kbaud. The 8-channel 10-bit ADC samples at up to 1 Msps (with the ADC clock derived from the system clock), adequate for current-sense or temperature feedback in a closed-loop control.","metaTitle":"LM3S1918-IQC50-A2T MCU, 50MHz, 256KB Flash","metaDescription":"Texas Instruments Stellaris LM3S1918-IQC50-A2T ARM Cortex-M3 MCU, 50MHz, 256KB Flash, 64Kx8 RAM, 100-LQFP. 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":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tape & Reel (TR)","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, IrDA, Microwire, 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":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1918","Program Memory Size":"256KB (256K 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":"$23.6527","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/46084d62ef5295c959adf1f0b652baa1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1918-IQC50-A2T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative in the Stellaris family?","answer":"A pin-compatible drop-in from the same LM3S1000 series (same 100-LQFP package, same core) may exist, but the exact flash and RAM sizes differ across order codes. Cross-reference the BOM's memory requirement and peripheral list against the current Stellaris or Tiva-C portfolio — no single replacement is recorded in this evidence set."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1918-IQC50-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/LM3S1918-IQC50-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:45:02.404Z","lastPublished":"2026-07-21T02:45:02.404Z","indexable":true}}