{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1H11-IQC50-A1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1H11-IQC50-A1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1H11-IQC50-A1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1H11-IQC50-A1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series microcontroller, LM3S1H11-IQC50-A1T, 32-bit single-core, 50MHz, 512KB Flash, 48KB RAM, 100-LQFP, -40°C to 85°C.","salesMarkdown":"## 50 MHz Cortex-M3 with 512 KB on-chip flash The LM3S1H11-IQC50-A1T: The 32-bit Cortex-M3 core includes a hardware single-cycle multiply and a 3-stage pipeline with branch speculation, delivering 1.25 DMIPS/MHz. At 50 MHz the throughput ceiling is approximately 62.5 DMIPS, constrained by flash wait states at this clock rate. ## 100-LQFP package and board integration Housed in a 100-pin LQFP with a 14x14 mm body and 0.50 mm pitch, the LM3S1H11-IQC50-A1T demands a 4-layer PCB for reliable fan-out of the inner rows. The I/O ring runs from the same rail or a separate 3.3 V supply depending on the peripheral voltage tolerance — the datasheet's power sequencing guideline specifies that VDD must reach the operating range before any I/O pin is driven externally. 67 general-purpose I/O lines are multiplexed with a comprehensive peripheral set: EBI/EMI for external memory or FPGA interface, I²C, SPI, SSI, UART/USART, IrDA, LINbus, and Microwire. The EBI/EMI bus supports both synchronous and asynchronous devices with up to four chip selects, enabling direct connection to external SRAM, NOR flash, or an FPGA without glue logic. An 8-channel 12-bit successive-approximation ADC samples at up to 1 Msps. On-chip peripherals include a brown-out detect/reset circuit, a power-on-reset module, a DMA controller, a PWM generator, and a watchdog timer. The DMA engine offloads the CPU for memory-to-peripheral transfers — useful for moving ADC samples to SRAM without core intervention. Texas Instruments has designated the LM3S1H11-IQC50-A1T as obsolete. No official successor or pin-compatible replacement is recorded from the original manufacturer. The Stellaris family was acquired by TI and later phased out; the Cortex-M4F-based TM4C series is the functional evolution but requires a board spin due to different pinout and peripheral map. Quantities are lot-specific and confirmed at RFQ. No last-time-buy window remains open from TI — procurement relies on existing inventory in the distribution channel.","metaTitle":"LM3S1H11-IQC50-A1T Texas Instruments ARM Cortex-M3 MCU","metaDescription":"Texas Instruments LM3S1H11-IQC50-A1T Stellaris ARM Cortex-M3 MCU, 50MHz, 512KB Flash, 48KB RAM, 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":"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":"EBI/EMI, I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"67","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"A/D 8x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1H11","Program Memory Size":"512KB (512K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","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/68920ccd04e046c9d0ddb9ddf41bb2dc.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the LM3S1H11-IQC50-A1T and how do I get a price?","answer":"The LM3S1H11-IQC50-A1T is obsolete and sourced through independent distribution channels. No stock-holding claim is made — each order is sourced per request."},{"question":"What is the closest pin-compatible alternative to the LM3S1H11-IQC50-A1T?","answer":"No official pin-compatible successor is recorded from Texas Instruments. The Stellaris family has been superseded by the TM4C series (Cortex-M4F), which uses a different pinout and peripheral set. A board redesign is required for migration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1H11-IQC50-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/LM3S1H11-IQC50-A1T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:48:14.485Z","lastPublished":"2026-07-21T02:48:14.485Z","indexable":true}}