{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S308-EGZ25-C2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S308-EGZ25-C2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S308-EGZ25-C2","factsUrl":"https://icboms.com/api/mcp/products/LM3S308-EGZ25-C2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 300 microcontroller, LM3S308-EGZ25-C2, 32-bit single-core, 25MHz, 16KB flash, 4KB RAM, 28 I/O, 48-VFQFN exposed pad, tray.","salesMarkdown":"## 25 MHz Cortex-M3 with 16 KB flash — what fits in that footprint The LM3S308-EGZ25-C2: That is a tight memory budget — enough for a single-loop control task or a UART-to-SPI bridge, but not for a full RTOS plus application stack. The 4 KB SRAM (organized as 4K x 8) leaves around 2.5 KB after the vector table and minimal HAL, so every global buffer counts. The part is in the Stellaris ARM Cortex-M3S 300 series, TI's first-generation Cortex-M3 family. It uses the ARMv7-M architecture with a single-cycle multiply and a 12-cycle divide — no FPU, no MPU. The 25 MHz ceiling is set by the internal oscillator; the device can also run from an external crystal or a PLL-locked source, though the PLL is not available on all package variants. ## Industrial temp grade and on-chip peripherals On-chip peripherals include a PWM module, a watchdog timer, and an 8-channel 10-bit ADC. The connectivity block supports I2C, Microwire, SPI, SSI, and UART/USART — enough for a sensor hub or a simple motor controller. The 28 general-purpose I/O lines are 5 V tolerant on most pins, which simplifies level translation when interfacing to legacy 5 V logic. ## 48-VQFN package — thermal pad and layout notes The device comes in a 48-VFQFN exposed pad package (7x7 mm body, 0.5 mm pitch). Surface-mount assembly with a tray handling option — the package is not moisture-sensitive above MSL 3 per JEDEC, but a bake-out before reflow is recommended if the shelf life has been exceeded. The 0.5 mm pitch demands a solder paste stencil aperture of about 0.25 mm width for the perimeter pads; the center pad needs a grid of small apertures to avoid voiding. The base product number is LM3S308 — the suffix -EGZ25-C2 encodes the package (48-VQFN), temperature range (industrial), and speed grade (25 MHz). When ordering, verify the full order code against the BOM position; the -C2 suffix indicates the latest silicon revision, which incorporates errata fixes from earlier stepping levels.","metaTitle":"TI LM3S308-EGZ25-C2 Cortex-M3 MCU, 25MHz, 16KB Flash","metaDescription":"Texas Instruments LM3S308-EGZ25-C2 Stellaris ARM Cortex-M3 MCU, 25MHz, 16KB flash, 4KB RAM, 8x10b ADC, -40°C to 105°C, 48-VQFN.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"25MHz","Series":"Stellaris® ARM® Cortex®-M3S 300","Package":"Tray","RAM Size":"4K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I2C, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"28","Core Processor":"ARM® Cortex®-M3","Package / Case":"48-VFQFN Exposed Pad","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S308","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 105°C (TA)","Supplier Device Package":"48-VQFN (7x7)","Voltage - Supply (Vcc/Vdd)":"3V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/90a978bd331b0d8880daa32faecfc169.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the flash and RAM size on the LM3S308-EGZ25-C2?","answer":"The device has 16 KB of flash program memory (16K x 8) and 4 KB of SRAM (4K x 8). The flash is organized as a single bank with sector erase granularity; the SRAM is mapped at 0x20000000 with no wait states at 25 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S308-EGZ25-C2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S308-EGZ25-C2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}