What the 50 MHz Cortex-M3 buys you in a BGA footprint
The LM3S6611-IBZ50-A2: The 108-ball BGA (10x10 mm) package packs 46 GPIOs into a board footprint that suits space-constrained control-plane designs — motor drives, building automation gateways, and industrial Ethernet nodes.
No last-time-buy dates or successor order code appear in the official record. Any new design-in should target a current-production Cortex-M3 or M4 with Ethernet — the Stellaris family has been superseded by TI's Tiva C Series, though the BGA footprint and peripheral set differ.
Ethernet on a 108-ball BGA — integration note
The Ethernet controller is a key differentiator for this part — it saves an external MAC chip on a board that needs a factory-network or building-automation link. The 50 MHz core has enough headroom to run a lightweight TCP/IP stack alongside the control loop, but the 32 KB RAM limits buffer depth, so plan for a small-footprint stack (uIP or lwIP in reduced mode). The BGA package means all signals route on inner layers; verify that the Ethernet PHY interface (MII/RMII) pins are accessible without excessive via stubs that could degrade signal integrity at 50 MHz.