{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1D21-IBZ80-A1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1D21-IBZ80-A1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1D21-IBZ80-A1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1D21-IBZ80-A1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series MCU, LM3S1D21-IBZ80-A1T, 32-bit single-core, 80 MHz, 512KB Flash, 96KB RAM, 108-BGA, -40 to 85°C.","salesMarkdown":"## Design-in fit for an industrial Cortex-M3 controller The LM3S1D21-IBZ80-A1T is a Stellaris ARM Cortex-M3 MCU from Texas Instruments, clocked at 80 MHz with a 32-bit single-core processor. It carries 512 KB of Flash and 96 KB of SRAM — enough headroom for a control loop with a moderate protocol stack, such as a motor drive running field-oriented control plus an EtherCAT slave. The 67 GPIOs and a connectivity set that includes EBI/EMI, I²C, SPI, SSI, UART/USART, CAN-style LINbus, IrDA, and Microwire mean it can bridge between a parallel LCD, a serial EEPROM, and a fieldbus transceiver without external glue logic. ## Memory and peripheral budget for the BOM line The 8-channel 12-bit ADC (A/D 8x12b) handles analog inputs like current-sense resistors or thermistor feedback directly, reducing the BOM count for external converters. Peripherals include brown-out detect, POR, DMA, PWM, and a watchdog timer — the PWM channels can drive a 3-phase inverter bridge, while the DMA offloads the Cortex-M3 core during high-speed UART or SPI transfers. ## Obsolete — sourcing path for production support Texas Instruments lists the LM3S1D21-IBZ80-A1T as obsolete. For existing BOM lines that require this exact part number, supply runs through independent distribution channels — quantities are lot-specific and confirmed at RFQ. ## Package and temperature grade for the deployment environment Housed in a 108-ball BGA (108-LFBGA, supplier device package 108-BGA 10x10 mm), this MCU requires a multi-layer PCB for fan-out — the 0.80 mm ball pitch is manageable with a 4-layer board using via-in-pad or dog-bone breakout.","metaTitle":"LM3S1D21-IBZ80-A1T ARM Cortex-M3 MCU, 80MHz, 512KB Flash","metaDescription":"Texas Instruments LM3S1D21-IBZ80-A1T Stellaris ARM Cortex-M3 MCU, 80MHz, 512KB Flash, 96KB RAM, -40 to 85°C. 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":"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":"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":"108-LFBGA","Product Status":"Obsolete","Data Converters":"A/D 8x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1D21","Program Memory Size":"512KB (512K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"108-BGA (10x10)","Voltage - Supply (Vcc/Vdd)":"1.235V ~ 1.365V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the LM3S1D21-IBZ80-A1T and get a price?","answer":"Sourced through independent distribution channels against an RFQ."},{"question":"What is the closest pin-compatible alternative to the LM3S1D21-IBZ80-A1T?","answer":"No pin-compatible direct replacement from Texas Instruments is recorded. The Stellaris family has been superseded by the Tiva C Series (ARM Cortex-M4F), but those parts use a different package and pinout — 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/LM3S1D21-IBZ80-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/LM3S1D21-IBZ80-A1T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:47:04.740Z","lastPublished":"2026-07-21T02:47:04.740Z","indexable":true}}