{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1D26-IQR80-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1D26-IQR80-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1D26-IQR80-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1D26-IQR80-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series MCU, LM3S1D26-IQR80-A2T, 80 MHz, 512 KB flash, 96 KB RAM, 64-LQFP, industrial temp.","salesMarkdown":"## 80 MHz Cortex-M3 with 512 KB flash — what the memory budget buys The LM3S1D26-IQR80-A2T: For a control-loop application running a real-time OS, the flash holds the kernel plus application image with room for field-update staging; the 96 KB SRAM buffers sensor data and communication stacks without external memory. The 12-bit ADC with eight multiplexed channels reads analog sensors directly — no external converter needed for basic current, voltage, or temperature monitoring. The on-chip DMA moves conversion results to SRAM without CPU intervention, keeping the 80 MHz core free for protocol handling. ## Peripheral set and connectivity — what it connects to on a factory-floor node Connectivity covers I²C, SPI, SSI, UART/USART, LIN, IrDA, and Microwire — enough to talk to a fieldbus PHY, an external EEPROM, a display module, and a serial sensor all on one chip. The LIN and IrDA support is less common at this price point; LIN suits automotive sub-networks, IrDA works for short-range optical data transfer in clean environments. The PWM module drives small motors or LED dimming directly; the WDT guards against firmware lockup in unattended equipment. The 33 general-purpose I/O lines in a 64-LQFP package give enough pins for a parallel LCD bus, a keypad matrix, and a few discrete I/O without expanding the footprint. ## Package and supply — board integration constraints The 64-LQFP package measures 10x10 mm with 0.5 mm pitch — a standard four-layer board with via-in-pad is not required; two-layer breakout is feasible for the outer rows, though inner rows need at least one signal layer. Industrial temperature range (-40°C to +85°C) means the part works in outdoor enclosures, unheated warehouses, and engine-bay-adjacent compartments without a heater. The internal oscillator eliminates the external crystal for basic clocking, though an external source is still an option for tighter accuracy. ## Obsolete status — what it means for a BOM line Texas Instruments has marked the LM3S1D26-IQR80-A2T as obsolete. The last-time-buy window has closed; no new factory orders are accepted. Sourcing is through independent distribution channels — surplus, broker inventory, and end-of-life stock. A pin-compatible replacement from the same Stellaris family may exist, but the exact fit depends on the target firmware and peripheral requirements — verify the BOM position against the original design files before committing.","metaTitle":"TI LM3S1D26-IQR80-A2T Cortex-M3 MCU, 80 MHz, 512 KB Flash","metaDescription":"Texas Instruments LM3S1D26-IQR80-A2T Stellaris Cortex-M3 MCU, 80 MHz, 512 KB flash, 96 KB 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":"80MHz","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tape & Reel (TR)","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 the LM3S1D26-IQR80-A2T?","answer":"No official pin-compatible successor is recorded from Texas Instruments. Other parts in the Stellaris Cortex-M3S 1000 series share the same core and package footprint, but flash, RAM, and peripheral mixes differ. Verify the BOM position against the original design files before substituting."},{"question":"What is the LM3S1D26-IQR80-A2T's core speed and memory?","answer":"The Cortex-M3 core runs at 80 MHz. On-chip memory is 512 KB of flash and 96 KB of SRAM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1D26-IQR80-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/LM3S1D26-IQR80-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:47:24.455Z","lastPublished":"2026-07-21T02:47:24.455Z","indexable":true}}