{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1D26-IQR80-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1D26-IQR80-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1D26-IQR80-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S1D26-IQR80-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series microcontroller, LM3S1D26-IQR80-A2, 80MHz, 512KB flash, 96KB RAM, 64-LQFP, -40°C to 85°C.","salesMarkdown":"## 80 MHz Cortex-M3 — memory budget and peripheral set The LM3S1D26-IQR80-A2 is a 32-bit single-core ARM Cortex-M3 MCU clocked at 80 MHz from the Stellaris series. On-chip memory breaks down as 512 KB of flash for firmware and bootloader, plus 96 KB x 8 of SRAM for data buffers and stack — enough for a modest RTOS with a few protocol stacks. Peripheral integration includes DMA, PWM, WDT, brown-out detect, and POR, which reduces the external supervisor and glue-logic count. Connectivity covers I²C, SPI, SSI, UART/USART, LIN, IrDA, and Microwire — the UART set alone handles multi-drop RS-485 or Modbus on a factory floor. The 8-channel 12-bit ADC brings analog measurement on-die; the internal oscillator saves the crystal BOM line for applications that tolerate ±1% accuracy over temperature. ## Industrial-temperature qualification and supply voltage An enclosure sitting on a hot factory floor or a rooftop telecom cabinet stays inside the operating envelope without active cooling. That demands a regulated rail — a standard 1.2 V LDO with ±2% tolerance sits inside the band; a 1.8 V rail fed through a divider does not. The I/O bank tolerance is not listed, but the narrow Vdd range is the tighter constraint for the board designer. Texas Instruments has marked this part obsolete. For a BOM that requires this exact part number, the procurement path is spot-market sourcing. A board spin to a current Cortex-M4 or M0+ from the same package family is the long-term migration option. ## 64-LQFP footprint — board layout constraints Housed in a 64-LQFP with a 10x10 mm body. The 0.50 mm pitch demands controlled impedance traces if any high-speed serial interfaces (SPI at 80 MHz) are routed to the edge — the peripheral set includes SSI and UART, so 2-layer boards are viable for low-speed I/O but 4-layer is safer for the core clock.","metaTitle":"LM3S1D26-IQR80-A2 Texas Instruments ARM Cortex-M3 MCU, 80MHz","metaDescription":"Texas Instruments LM3S1D26-IQR80-A2 Stellaris ARM Cortex-M3 MCU, 80MHz, 512KB flash, 96KB RAM, 64-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":"80MHz","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tray","RAM Size":"96K 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":"LM3S1D26","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/2247965125a0408ba40a5c455d9325e4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM3S1D26-IQR80-A2?","answer":"The Stellaris family has largely migrated to the Tiva C series (TM4C123/129), which uses a different pinout and peripheral map — a board layout change is required."},{"question":"What is LM3S1D26-IQR80-A2's core speed and memory?","answer":"80 MHz ARM Cortex-M3 core with 512 KB flash and 96 KB x 8 SRAM. The 80 MHz clock is the internal maximum — the flash wait-state controller adjusts automatically to keep zero-wait access at lower frequencies."},{"question":"What compliance documentation does Texas Instruments provide for LM3S1D26-IQR80-A2?","answer":"No specific compliance documentation (RoHS, REACH, UL, IEC) is listed on the part record. TI typically provides RoHS and REACH declarations for active parts; for an obsolete part, the documentation is limited to what the original production batch carried."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1D26-IQR80-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/LM3S1D26-IQR80-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:47:06.446Z","lastPublished":"2026-07-21T02:47:06.446Z","indexable":true}}