So a 74xx244 works at a commercial operating temperature, while a 54xx244 which is the same logic device [maybe the same pinout, and package] will continue to operate to the military operating temperature range [which is wider].
A distemper vaccine is more than a preventive against canine distemper virus. This vaccine, considered a core vaccine for all dogs in the United States, also protects against a host of other diseases you may not know your dog is susceptible to. These can include adenovirus, parvovirus, and others.
The vaccine commonly known as Distemper is actually a collection of vaccines given in one shot. 1  Itâs technically called the DHPP vaccine: each letter stands for a virus or disease. In this shot, we have Distemper itself, Hepatitis, Parvovirus and Parainfluenza: 2  Distemper is a virus that causes multi-system abnormalities, and is often fatal.