50 MHz Cortex-M3 with 128 KB Flash — mid-range Stellaris MCU
It carries 128 KB of program Flash and 20K x 8 of SRAM, placing it in the mid-range tier of the Stellaris 1000 series for control-oriented applications.
Obsolete — no official successor on record
No direct pin-compatible replacement part number has been published by TI for this specific order code. The Stellaris family was migrated to the Tiva C series, but a drop-in footprint and register-map match is not guaranteed — any migration requires a full firmware and layout review.
100-LQFP footprint — layout constants
The 67 available GPIOs occupy most of the perimeter, so fan-out via blind vias under the package is not required — a two-layer board can route the signals if the decoupling caps are placed close to the supply pairs.