{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1D21-IBZ80-A1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1D21-IBZ80-A1","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1D21-IBZ80-A1","factsUrl":"https://icboms.com/api/mcp/products/LM3S1D21-IBZ80-A1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series microcontroller, LM3S1D21-IBZ80-A1, 32-bit single-core, 80MHz, 512KB Flash, 96KB RAM, 108-LFBGA, tray.","salesMarkdown":"## Cortex-M3 core at 80 MHz with 512 KB flash The LM3S1D21-IBZ80-A1 is a Stellaris-series ARM Cortex-M3 microcontroller running at 80 MHz — the 32-bit single-core pipeline delivers 1.25 DMIPS/MHz, so the effective throughput is about 100 DMIPS before flash wait-states cut in. The internal oscillator eliminates the external crystal for the core clock, though the RTC or USB (if used) still needs a 32.768 kHz watch crystal. ## Peripheral set and connectivity options 67 GPIOs are available on the 108-ball BGA package, with an external bus interface (EBI/EMI) that can gluelessly connect to SRAM, NOR flash, or an FPGA over a 16-bit parallel bus. Serial connectivity covers I²C, SPI, SSI, UART/USART, IrDA, LINbus, and Microwire — enough to talk to sensors, displays, and fieldbus transceivers on the same chip. On-chip peripherals include an 8-channel 12-bit ADC, a PWM module for motor or LED control, a DMA controller for memory-to-peripheral transfers without CPU intervention, plus brown-out detect, POR, and a watchdog timer. The industrial temperature range (-40°C to 85°C) makes it suitable for factory-floor controllers and outdoor equipment enclosures. Texas Instruments has marked the LM3S1D21-IBZ80-A1 as obsolete. No last-time-buy window remains open with the factory. For a BOM that already carries this MCU, the 108-BGA (10x10 mm) footprint and 1.235-1.365 V core rail are the critical dimensions for a drop-in replacement search. Any alternative must match the ball map and the narrow supply range to avoid a board spin.","metaTitle":"LM3S1D21-IBZ80-A1 Texas Instruments Cortex-M3 MCU, 80MHz","metaDescription":"Texas Instruments LM3S1D21-IBZ80-A1 Stellaris ARM Cortex-M3 MCU, 80MHz, 512KB Flash, 96KB RAM, 108-BGA. 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":"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 LM3S1D21-IBZ80-A1 and get a price?","answer":"This part is sourced to order through independent distribution. No stock-holding claim is made — each order is sourced against the BOM line."},{"question":"What is the closest pin-compatible alternative to LM3S1D21-IBZ80-A1?","answer":"The Stellaris family has been superseded by the Tiva C series, but those devices use a different package and ball map. A board-level redesign is required for any direct replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1D21-IBZ80-A1","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-A1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:47:03.442Z","lastPublished":"2026-07-21T02:47:03.442Z","indexable":true}}