Existing production lines can continue to source it through independent distribution, but new projects should evaluate a pin-compatible or functionally equivalent alternative. The Stellaris family has a broad portfolio; a drop-in replacement within the same 48-LQFP footprint may be available — confirm pin-to-pin compatibility against the datasheet before committing the layout.
20 MHz core and 3.3 V supply — design-fit check
The 20 MHz clock rate keeps power draw moderate for always-on control loops. The 48-LQFP (7x7 mm) package is hand-solderable and common across many Stellaris parts, easing board reuse. Brown-out detect and POR are integrated, so external reset supervision is optional.