What the LM3S611-IQN50-C2T is and where it fits
The Texas Instruments LM3S611-IQN50-C2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris® 600 series, clocked at 50 MHz with 32 KB of Flash and 8 KB of RAM. It carries 32 general-purpose I/O lines, a 4-channel 10-bit ADC, and serial interfaces including I²C, SPI, SSI, and UART/USART. The part is housed in a 48-LQFP package (7x7 mm) and rated for the industrial temperature range of -40°C to 85°C, making it suitable for factory automation, motor control, and embedded control panels where a moderate-performance Cortex-M3 core is sufficient.
50 MHz core — what it means for the control loop
At 50 MHz, this Cortex-M3 executes single-cycle multiply and hardware divide, enough for PID loops running at a few kHz. The 8 KB RAM is the tighter resource: a full TCP/IP stack won't fit, but a lightweight serial protocol handler will.
Obsolete — sourcing reality for the BOM line
The LM3S611-IQN50-C2T is officially obsolete (EOL). No last-time-buy window remains open from the manufacturer. For a BOM line that needs this exact order code, the only channel is the independent surplus and broker market.