54 Series - military spec

A small offering of 54 series logic integrated circuits as required in military, avaition and medical equipment.   

Having a greater range of physical and electrical characteristics over conventional 74 series.   

i.e ceramic packaging for a greater heat range.   

These come at a premium so we advise that unless you need to replace one for one a 54 series chip you look at the cheaper standard logic equivalents (74 series)