What this part is
The 54F163ADC is a binary counter from the 54F series, designed for synchronous counting applications in digital logic systems. It is commonly used in frequency division, event counting, and timing circuits where a parallel-loadable, synchronous up-counter is required. The part is, which means it ships as loose devices rather than tape-and-reel, suited for through-hole assembly or prototyping environments.
No last-time-buy or obsolescence risk is associated with this part at present.
Equivalent or second-source considerations
The 54F prefix indicates the military-temperature range version.