Part Number: SN54HC273-SP Hi,
The datasheet specifies a radiation tolerance that's qualified for space, but can you explain or direct me to an explanation that covers the qualification process of such space grade equipment and if radiation tolerant is…
Normal plastic packages probably have a high rate of outgassing. In any case, it's not tested.
The SN54HC273-SP and UC1637-SP are guaranteed to work in vacuum; see the Space Guide .