{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S9U92-IBZ80-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S9U92-IBZ80-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S9U92-IBZ80-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S9U92-IBZ80-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 9000 series LM3S9U92-IBZ80-A2, 32-Bit Single-Core MCU, 80MHz, 384KB Flash, 96K x 8 RAM, Ethernet/CAN/USB OTG, 108-LFBGA, -40°C~85°C.","salesMarkdown":"It runs at 80 MHz and packs 384 KB of Flash program memory alongside 96 KB of SRAM, which is enough for a real-time control stack plus a TCP/IP or CANopen protocol layer without external memory. The core is a single-cycle multiply Cortex-M3 with a 32-bit bus matrix, so the 80 MHz clock delivers deterministic interrupt response for time-critical control loops. On-chip peripherals include a 16-channel 12-bit ADC, PWM outputs, quadrature encoder interface (QEI) for motor position feedback, and a DMA controller that can move data between Ethernet, USB, and serial buffers without CPU intervention. The internal oscillator trims to within 1% accuracy, though an external crystal is still the right choice for CAN or Ethernet timing where the spec demands ±0.5% tolerance. Texas Instruments has ended production, with no last-time-buy window currently open. Any migration will require a firmware port and re-validation of the board-level timing, not just a re-spin of the BOM line. ## 80 MHz Cortex-M3 — what the speed rating delivers The 80 MHz core clock is the single performance anchor for this part. At this speed the Cortex-M3 executes most single-cycle instructions in 12.5 ns, which means a PID loop with 10 µs update rate has roughly 800 instructions per cycle — comfortable for a motor control or power-conversion algorithm. The Flash memory uses a prefetch buffer to avoid wait-state penalties at 80 MHz, so tight loops in the control ISR run at full speed without stalling on instruction fetches. Compare this to the 50 MHz variants in the same Stellaris family: the 80 MHz part gives a 60% throughput headroom for protocol processing (Ethernet frame forwarding, CAN message filtering) on top of the control workload. If your application already runs at 50 MHz with 70% CPU load, this part buys margin for future feature additions without a core architecture change. ## BGA footprint and board-level considerations The 108-ball BGA (10x10 mm array, 0.8 mm pitch) is a compact package that saves board area versus a 100-pin LQFP, but it demands at least a 4-layer PCB with buried vias for fanout. The ball map is a 12x12 grid with the center rows depopulated, so routing the inner balls to the outer perimeter requires via-in-pad or microvia techniques on high-density designs. The core supply is 1.235 V to 1.365 V, a narrow range that needs a dedicated LDO or switching regulator with tight regulation. The I/O supply is separate (3.3 V typical) and powers the 65 GPIOs plus the Ethernet PHY and USB transceiver. Decoupling the 1.3 V core rail with a 10 µF ceramic plus 0.1 µF per supply pin pair is the baseline; the Ethernet PHY's analog supply needs its own LC filter to keep switching noise out of the transmit signal.","metaTitle":"LM3S9U92-IBZ80-A2 Stellaris ARM Cortex-M3 MCU, 80 MHz","metaDescription":"LM3S9U92-IBZ80-A2 is an obsolete Stellaris ARM Cortex-M3 MCU with 80 MHz core, 384 KB Flash, 96 KB RAM, Ethernet, CAN, USB OTG in 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 9000","Package":"Tray","RAM Size":"96K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, Ethernet, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"65","Core Processor":"ARM® Cortex®-M3","Package / Case":"108-LFBGA","Product Status":"Obsolete","Data Converters":"A/D 16x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S9U92","Program Memory Size":"384KB (384K 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":"https://cdn.icboms.com/fc0303f2fd91b149d5b22f262664ec01.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LM3S9U92-IBZ80-A2 obsolete?","answer":"Yes, the LM3S9U92-IBZ80-A2 is listed as Obsolete by Texas Instruments. Production has ended and no last-time-buy window is active."},{"question":"What is the replacement for LM3S9U92-IBZ80-A2?","answer":"A pin-compatible sibling within the Stellaris 9000 series (same 108-BGA footprint) could serve as a hardware drop-in, but the firmware will require porting due to differences in peripheral register maps and memory sizes. Any migration plan should include a full re-qualification of timing and peripheral behavior."},{"question":"What is the price of LM3S9U92-IBZ80-A2?","answer":"Pricing for this obsolete part varies with available surplus inventory. No single fixed price can be stated due to market conditions."},{"question":"How fast is LM3S9U92-IBZ80-A2?","answer":"The core runs at 80 MHz, which is the maximum clock speed for this Cortex-M3 device. At this frequency most single-cycle instructions execute in 12.5 ns, and the Flash prefetch buffer keeps the pipeline fed without wait-state penalties."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S9U92-IBZ80-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/LM3S9U92-IBZ80-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}