{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1B21-IBZ80-C5","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1B21-IBZ80-C5","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1B21-IBZ80-C5","factsUrl":"https://icboms.com/api/mcp/products/LM3S1B21-IBZ80-C5","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series microcontroller, LM3S1B21-IBZ80-C5, 80 MHz, 32-bit, 256 KB flash, 96 KB RAM, 108-BGA, tray.","salesMarkdown":"## Obsolete — spot-market sourcing only Texas Instruments has marked the LM3S1B21-IBZ80-C5 as obsolete. Availability and pricing confirmed per lot at quote time; date codes and quantities vary. ## 80 MHz Cortex-M3 with 256 KB flash The ARM Cortex-M3 core runs at 80 MHz — the 32-bit single-core architecture delivers 1.25 DMIPS/MHz, putting throughput around 100 DMIPS assuming zero-wait flash access. On-chip memory: 256 KB flash for program storage and 96 KB SRAM for data. The flash is large enough for a full protocol stack plus application code; the 96 KB RAM leaves headroom for packet buffers in Ethernet or EBI/EMI applications. ## 108-ball BGA — 10x10 mm footprint Packaged in a 108-LFBGA, supplier device package 108-BGA 10x10 mm. The 0.80 mm ball pitch demands a multi-layer PCB for fan-out — a 4-layer board is typical for this density. 67 general-purpose I/O lines bring out the peripheral mix: EBI/EMI for external memory or parallel displays, plus I²C, SPI, SSI, UART, IrDA, LIN, and Microwire serial interfaces.","metaTitle":"TI LM3S1B21-IBZ80-C5 Cortex-M3 MCU, 80 MHz, 256 KB Flash","metaDescription":"Texas Instruments LM3S1B21-IBZ80-C5 Stellaris ARM Cortex-M3 MCU. 80 MHz, 256 KB flash, 96 KB RAM, 108-BGA.","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 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1B21","Program Memory Size":"256KB (256K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"108-BGA (10x10)","Voltage - Supply (Vcc/Vdd)":"1.08V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5a682c061d806b177dc245e9bb945319.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LM3S1B21-IBZ80-C5?","answer":"We source LM3S1B21-IBZ80-C5 through independent distribution channels. Submit an RFQ for current availability, pricing, and date-code options. No stock-holding claim — confirmed per request."},{"question":"What is the closest pin-compatible alternative to LM3S1B21-IBZ80-C5?","answer":"No official pin-compatible successor is recorded from Texas Instruments. The Stellaris family shares the same Cortex-M3 core and peripheral set across many derivatives, but pin compatibility requires verifying the specific BGA ballout against the target part number."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1B21-IBZ80-C5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1B21-IBZ80-C5 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:46:31.200Z","lastPublished":"2026-07-21T02:46:31.200Z","indexable":true}}