What this part is and where it fits
The Texas Instruments LM3S310-IQN25-C2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 300 series. It runs at 25 MHz with 16 KB of Flash program memory and 4K x 8 of SRAM, giving it enough compute and storage for basic control, sensor interface, or serial-communication tasks in industrial or embedded systems. The 36 general-purpose I/O lines and built-in serial interfaces — Microwire, SPI, SSI, UART/USART — let it handle moderate I/O and protocol bridging without external logic. The internal oscillator keeps the BOM simple, and the brown-out detect, POR, PWM, and watchdog timer cover the usual supervision and timing needs for a standalone controller.
Industrial temperature grade and package
Rated for -40°C to 85°C, this MCU is at home in factory-floor enclosures, outdoor telecom cabinets, or engine-bay-adjacent electronics where the ambient can swing. The 48-LQFP package (7x7 mm body) is a common surface-mount footprint that routes easily on a two-layer board and fits tight panel layouts. Supply range of 3V to 3.6V lets it run from a standard 3.3V rail without an extra regulator.