Peripherals and connectivity — what is on the die
That means the only channel for this part today is the surplus and broker market — new-old-stock or pulled inventory from closed production runs. There is no LTB window to catch; the production line has already stopped.
64 KB of Flash is a mid-range budget for a Cortex-M3 — enough for a modest RTOS, a USB or CAN stack, and application logic, but tight if you are porting a large legacy codebase or adding over-the-air update staging. The 12 KB SRAM handles stack, heap, and DMA buffers; watch the linker map if your application uses double-buffered ADC or large lookup tables. If your firmware already fits on this part, the memory sizing is settled — just the sourcing question remains.