{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5C51-IQC80-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5C51-IQC80-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5C51-IQC80-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5C51-IQC80-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series MCU, LM3S5C51-IQC80-A2T, 32-bit single-core, 80MHz, 512KB Flash, 64K x 8 RAM, 67 I/O, CANbus/USB OTG/Ethernet, 100-LQFP, -40°C to 85°C.","salesMarkdown":"## What this Cortex-M3 brings to the board It is built for industrial control, motor drive, and human-machine interface applications where a mix of real-time control and connectivity is needed — the peripheral set includes CAN, USB OTG, multiple UART/SPI/I²C channels, and a QEI for quadrature encoder inputs. ## Memory and peripheral fit 512 KB of on-chip Flash (512K x 8) paired with 64 KB SRAM (64K x 8) gives enough headroom for a modest RTOS, a TCP/IP stack, and a control loop without external memory. The 16-channel 12-bit ADC samples at rates suitable for motor current sensing or multi-channel sensor acquisition. On the connectivity side, the USB OTG port handles device/host/OTG roles, while the CAN 2.0B controller and full set of serial interfaces (UART, SPI, I²C, SSI, Microwire, IrDA, LIN) cover most industrial fieldbus and debug link requirements. ## Industrial temperature range and operating conditions The supply voltage window is 3.0 V to 3.6 V, matching a standard 3.3 V rail with margin for ripple. Internal oscillator is available, though an external crystal or clock source can be used for tighter timing accuracy. Any new-design win should look at TI's current Cortex-M4 or M7 families, though a pin-for-pin drop-in does not exist; a board respin will be required. ## Sourcing posture Buyers filling a BOM line for an existing production board should expect to work with broker or excess inventory sources; the window for last-time-buy orders from TI has closed.","metaTitle":"LM3S5C51-IQC80-A2T Stellaris ARM Cortex-M3 MCU, 80MHz","metaDescription":"Texas Instruments LM3S5C51-IQC80-A2T 32-bit ARM Cortex-M3 MCU, 80MHz core, 512KB Flash, 64KB SRAM, industrial temp -40°C to 85°C, 100-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 5000","Package":"Tape & Reel (TR)","RAM Size":"64K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"67","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"A/D 16x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S5C51","Program Memory Size":"512KB (512K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"3V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5C51-IQC80-A2T/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy LM3S5C51-IQC80-A2T?","answer":"This part is obsolete and no longer in production at Texas Instruments. Submit an RFQ for current availability and pricing — quotes are confirmed at order time against verified stock."},{"question":"Is LM3S5C51-IQC80-A2T obsolete?","answer":"Yes, the lifecycle status is Obsolete. TI has discontinued this Stellaris Cortex-M3 MCU. There is no official pin-compatible replacement listed; any new design will require migrating to a current-generation TI MCU family, which will involve a board layout change."},{"question":"What is the difference between LM3S5C51-IQC80-A2T and LM3S5C51-IQC80-A2?","answer":"The 'T' suffix in the order code indicates Tape & Reel packaging. The base part LM3S5C51-IQC80-A2 is the tray/tube variant. Electrically and functionally they are identical — same 80 MHz Cortex-M3, same 512 KB Flash, same 64 KB SRAM, same 100-LQFP package, same industrial temperature range. The difference is purely in the shipping medium."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5C51-IQC80-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/LM3S5C51-IQC80-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}