The Texas Instruments LM3S6G65-IBZ80-A2T is a 32-bit ARM Cortex-M3 MCU from the Stellaris family, clocked at 80 MHz with 512 KB of Flash and 64 KB of SRAM.
The 80 MHz Cortex-M3 core runs a lightweight TCP/IP stack alongside a control loop and ADC sampling. The 80 MHz bin is the one to pick if the Ethernet frame rate or the PWM update period is the timing constraint.
Industrial temperature range and BGA footprint
The 108-ball LFBGA (10x10 mm) requires controlled solder-paste deposition and X-ray inspection — not a hand-solder candidate. Plan for a four-layer PCB with a dedicated ground plane under the BGA to keep signal integrity on the Ethernet differential pairs.
EOL lifecycle — sourcing reality
The LM3S6G65-IBZ80-A2T carries an end-of-life (hot) status. TI has discontinued the Stellaris series; no official successor from TI exists in the same pinout.