50 MHz Cortex-M3 with 256 KB Flash — the memory and speed profile
The LM3S1850-EQC50-A2T: The 100-LQFP package (14x14 mm) exposes 56 general-purpose I/O lines. The 2.25 V to 2.75 V supply rail is tighter than the typical 3.3 V MCU — the board's regulator must hold within that window across load steps.
Industrial temperature grade and on-chip peripherals
The internal oscillator eliminates the external crystal for the core clock, saving two pins and a board component. Connectivity includes I²C, SPI, SSI, UART/USART, IrDA, and a QEI for quadrature encoder inputs — useful for motor-feedback loops. On-chip peripherals cover brown-out detection, POR, PWM generation, and a watchdog timer.
Texas Instruments lists the LM3S1850-EQC50-A2T as obsolete. For a BOM line that already carries this order code, the procurement decision is whether the remaining build volume justifies a last-time buy or a board spin to a current-generation Cortex-M4 or M7 part in a similar 100-pin LQFP footprint.