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 canine distemper vaccine is a common shot dogs first get when they are between the ages of 4 to 20 weeks.Dogs are then given booster shots of the vaccine based on their veterinarian's recommendation.he success of the vaccine depends on the interference, or lack thereof, of the maternal antibody. Some veterinarians may recommend a puppy be vaccinated at the age of 6 weeks and then every 2 to 4 weeks after that until the dog is 16-weeks-old.