Stellaris Cortex-M3 with Ethernet and USB — what this part was designed for
The LM3S9D92-IQC80-A1: It was designed for industrial control, building automation, and networked sensor hubs where a single-chip Ethernet and CAN gateway was needed.
80 MHz Cortex-M3 — what the core speed delivers
The Cortex-M3 core runs at 80 MHz. Single-cycle multiply and hardware divide keep interrupt latency predictable for motor-drive and power-conversion applications.
Industrial temperature grade — deployment envelope
The 1.235 V to 1.365 V core supply is tight — the board-level regulator must hold within that window across load steps and temperature. MSL level should be verified from the date-code trace before reflow.
For production builds that cannot migrate to a newer Stellaris or Tiva-C series device, the only channel is independent distribution — surplus stock, new-old-stock, or broker-sourced units. Each lot should be inspected for date code consistency and tested for functional compliance before a production run.