{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S9997-IQC80-C3T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S9997-IQC80-C3T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S9997-IQC80-C3T","factsUrl":"https://icboms.com/api/mcp/products/LM3S9997-IQC80-C3T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 9000 series LM3S9997-IQC80-C3T, 32-bit MCU, 80MHz, 256KB Flash, 64K x 8 RAM, Ethernet + USB OTG + CAN, 60 I/O, -40°C to 85°C, 100-LQFP.","salesMarkdown":"## 80 MHz Cortex-M3 with Ethernet and USB OTG — the gateway MCU that is now obsolete The 60 GPIOs and 16-channel 10-bit ADC support sensor fusion and local control loops without an external FPGA or CPLD. ## Industrial temperature range and peripheral mix — what it means for a retrofit or repair BOM The 1.235 V to 1.365 V core supply is tight — your existing 1.2 V or 1.8 V rail needs a local LDO or a precision switcher; a standard 3.3 V-only board will not power the core directly. The Stellaris family was acquired and later wound down; production ended years ago. New-manufacture stock is no longer available from the factory. ## Pin-compatible alternatives — what to look for in the same footprint Within the Stellaris LM3S9000 series, the LM3S9997-IQC80-C5T is a nominal sibling sharing the same 100-LQFP package and 80 MHz core. The difference is in the temperature grade or qualification variant (the C5T suffix). Without a full cross-reference from TI, any substitution requires a pin-to-pin comparison of the datasheets. For a new design, migrating to a current-production Cortex-M4 or M7 part with Ethernet and USB OTG in the same footprint is the practical path — but that means a board layout change and firmware port.","metaTitle":"LM3S9997-IQC80-C3T Stellaris ARM Cortex-M3 MCU, 80MHz","metaDescription":"LM3S9997-IQC80-C3T Stellaris ARM Cortex-M3 MCU, 80MHz, 256KB Flash, 64K x 8 RAM, Ethernet+USB OTG+CAN.","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":"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, Ethernet, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"60","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"A/D 16x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S9997","Program Memory Size":"256KB (256K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","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/a16760f1b1ed2b544492e5acf48839b9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the LM3S9997-IQC80-C3T obsolete?","answer":"Yes. Texas Instruments has marked this part as obsolete. No official replacement order code is published. Surplus and broker channels are the only supply route."},{"question":"What is the speed of the LM3S9997-IQC80-C3T?","answer":"The ARM Cortex-M3 core runs at 80 MHz."},{"question":"Does the LM3S9997-IQC80-C3T have a datasheet?","answer":"Yes, the original TI datasheet for the Stellaris LM3S9997 is available. It covers the 80 MHz core, 256 KB Flash, 64K x 8 SRAM, Ethernet MAC+PHY, USB OTG, CAN, and the 16-channel 10-bit ADC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S9997-IQC80-C3T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S9997-IQC80-C3T 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}}