What the 50 MHz Cortex-M3 core means for your board
The LM3S1918-EQC50-A2T is a Stellaris-series ARM Cortex-M3 running at 50 MHz — enough throughput for real-time control loops, sensor fusion, or protocol bridging without needing an external DSP. With 52 GPIOs, eight 10-bit ADC channels, and a peripheral set that includes I²C, SPI, UART, and IrDA, this part can handle mixed-signal control and multiple serial buses from a single 100-pin LQFP package.
Industrial temperature range and supply rails
The core runs on a 2.25 V to 2.75 V supply, which is tighter than the 3.3 V single-rail many Cortex-M3s use — your board's regulator needs to hold that band across load steps. The internal oscillator saves a crystal on the BOM for applications that can tolerate ±1-2% accuracy.
Texas Instruments has marked the LM3S1918-EQC50-A2T as obsolete. Quantities are lot-specific; no stock-holding claim is made here.