{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5C56-IQR80-A1T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5C56-IQR80-A1T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5C56-IQR80-A1T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5C56-IQR80-A1T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series LM3S5C56-IQR80-A1T, 32-Bit Single-Core MCU, 80MHz, 512KB FLASH, 64K x 8 RAM, CANbus/I²C/SPI/UART/USB OTG, 64-LQFP, -40°C~85°C.","salesMarkdown":"## 80 MHz core and 512 KB Flash — what they mean for a replacement search That places it in the mid-range Cortex-M3 tier — enough throughput for a motor drive with CANopen and a USB host stack running concurrently, but not the high-end 120 MHz+ parts. The 64-LQFP package with 33 I/O and an 8-channel 12-bit ADC means the pinout and analog channel count are constraints you'll need to match in any pin-compatible replacement. For a board that needs this exact MCU — whether it's a legacy controller in the field or a repair requiring the same firmware image — the supply path is the independent distribution market. No official replacement part number has been published by TI for this specific variant, so a pin-compatible swap would require validating a different Stellaris or a third-party Cortex-M3 with the same 64-LQFP footprint and peripheral map. ## Industrial temperature grade and 3V–3.6V supply rail The supply range of 3V to 3.6V means it runs on a single 3.3V rail — common for mixed-signal boards — and integrates a brown-out detect and POR to handle power-up sequencing cleanly.","metaTitle":"LM3S5C56-IQR80-A1T Stellaris ARM Cortex-M3 MCU, 80MHz","metaDescription":"Texas Instruments LM3S5C56-IQR80-A1T Stellaris ARM Cortex-M3S 5000 MCU. 80MHz, 512KB Flash, 64K x 8 RAM, 64-LQFP, -40°C~85°C.","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, POR, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"33","Core Processor":"ARM® Cortex®-M3","Package / Case":"64-LQFP","Product Status":"Obsolete","Data Converters":"A/D 8x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S5C56","Program Memory Size":"512KB (512K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"64-LQFP (10x10)","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/LM3S5C56-IQR80-A1T/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3S5C56-IQR80-A1T?","answer":"Texas Instruments has not published a direct pin-compatible replacement for this specific order code. A functional replacement would require selecting another Cortex-M3 MCU in a 64-LQFP package with 80 MHz or higher core speed, 512 KB Flash, and the same peripheral set including CAN, USB OTG, and multiple serial interfaces. Any candidate needs validation against the original firmware and board layout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5C56-IQR80-A1T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S5C56-IQR80-A1T 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}}