{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S5P31-IQC80-C3T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S5P31-IQC80-C3T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S5P31-IQC80-C3T","factsUrl":"https://icboms.com/api/mcp/products/LM3S5P31-IQC80-C3T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 5000 series 32-bit MCU, LM3S5P31-IQC80-C3T, 80 MHz, 64 KB Flash, 24 KB RAM, 100-LQFP, -40 to 85°C.","salesMarkdown":"## 64 KB flash / 24 KB RAM — memory budget matters The LM3S5P31-IQC80-C3T: 64 KB of on-chip flash and 24 KB of SRAM. For a typical motor-drive comms stack (CANopen + UART bootloader) plus a 10 kHz current loop, the firmware footprint lands around 40–48 KB — leaving headroom for a modest RTOS kernel and a few data logs. The 24 KB RAM is enough for a double-buffered ADC buffer of 256 samples per channel on all 16 channels, with space left for the stack. ## Peripheral set — CAN, USB, and 16-channel ADC Connectivity includes CANbus for industrial fieldbus, full-speed USB (device/host/OTG), multiple UART/USART, SPI, I²C, and SSI for serial sensor interfaces. The 16-channel 10-bit ADC samples at up to 1 MSPS — sufficient for reading thermocouple or pressure-transducer outputs in a machine-monitoring node. On-chip brown-out detect, POR, and a watchdog timer let the part run unattended in an enclosure without an external supervisor IC. ## Obsolete — sourcing reality check Texas Instruments lists this part as obsolete. The 100-LQFP (14x14 mm) footprint is common across the Stellaris family, but no pin-compatible direct replacement has been announced.","metaTitle":"Texas Instruments LM3S5P31-IQC80-C3T Cortex-M3, 80 MHz","metaDescription":"TI Stellaris LM3S5P31-IQC80-C3T ARM Cortex-M3 MCU, 80 MHz, 64 KB flash, 24 KB RAM, 100-LQFP. Obsolete — sourced to order through independent distribution.","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":"24K 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","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 16x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S5P31","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"1.08V ~ 1.32V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.6100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6eb0e448a2435bd671cb24636bc93dca.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S5P31-IQC80-C3T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to LM3S5P31-IQC80-C3T?","answer":"Other Stellaris 5000-series parts in the same 100-LQFP package may share the footprint but differ in flash/RAM size and peripheral mix — a BOM-level review is needed to confirm fit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S5P31-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/LM3S5P31-IQC80-C3T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:55:58.192Z","lastPublished":"2026-07-21T02:55:58.192Z","indexable":true}}