{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1H16-IQR50-A1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1H16-IQR50-A1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1H16-IQR50-A1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1H16-IQR50-A1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series, 32-bit MCU, 50MHz, 512KB Flash, 48KB RAM, 33 I/O, 8x12-bit ADC, 64-LQFP, -40 to 85°C, 1.235-1.365V supply, Tape & Reel.","salesMarkdown":"## What the 50MHz Cortex-M3 means on a legacy board The LM3S1H16-IQR50-A1T is a Texas Instruments Stellaris ARM Cortex-M3 MCU clocked at 50MHz — that is the core speed ceiling, not the flash access speed. With 512KB of program Flash and 48KB of RAM, it fits firmware images that outgrew smaller Stellaris parts without a board spin. The 32-bit single-core Cortex-M3 handles the Thumb-2 instruction set, so code density is tighter than a pure ARM32 core — useful when the Flash is already half-full with a legacy application. ## Memory and I/O for a field-swap decision 512KB of on-chip Flash and 48KB of SRAM (organized as 48K x 8) give this MCU enough room for a moderate control stack plus a small data logger. If your existing firmware image is near 480KB, this part still fits; if it crossed 512KB, you need a larger Flash variant in the same package. 33 general-purpose I/O lines in the 64-LQFP package — the 10x10mm body with 0.5mm pitch is a common footprint. The pinout is the same across several Stellaris parts in the same package, so a layout swap between siblings is possible without a respin. Connectivity covers I²C, SPI, SSI, UART/USART, LINbus, IrDA, and Microwire — enough for a sensor hub or a motor drive interface. The 8-channel 12-bit ADC samples at rates adequate for current sensing or temperature monitoring in an industrial control loop. ## Obsolete — sourcing reality for the BOM line Texas Instruments lists this part as Obsolete. The part is sourced through independent distribution channels — quantities are lot-specific and confirmed at RFQ.","metaTitle":"TI LM3S1H16-IQR50-A1T ARM Cortex-M3 MCU, 50MHz, 512KB Flash","metaDescription":"Texas Instruments Stellaris LM3S1H16-IQR50-A1T ARM Cortex-M3 MCU, 50MHz, 512KB Flash, 48KB RAM, 64-LQFP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tape & Reel (TR)","RAM Size":"48K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"33","Core Processor":"ARM® Cortex®-M3","Package / Case":"64-LQFP","Product Status":"Obsolete","Data Converters":"A/D 8x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1H16","Program Memory Size":"512KB (512K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"64-LQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"1.235V ~ 1.365V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de194519ed916c2871c81590ec8f7b42.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LM3S1H16-IQR50-A1T and get a price?","answer":"Submit a request with your target quantity; availability and current market pricing are confirmed at quote time. No stock-holding claim is made — each lot is sourced per inquiry."},{"question":"What is the closest pin-compatible alternative to LM3S1H16-IQR50-A1T?","answer":"No official pin-compatible successor is listed by Texas Instruments for this specific order code. Other Stellaris parts in the same 64-LQFP package may share the pinout, but the Flash/RAM sizes and peripheral set differ. Verify the BOM position against the datasheet pin map before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1H16-IQR50-A1T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1H16-IQR50-A1T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:48:11.494Z","lastPublished":"2026-07-21T02:48:11.494Z","indexable":true}}