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 distemper/parvo vaccination is typically given at 6-8 weeks of age and boosted 2 times at three week intervals, and again a year later. Like rabies, after the first year, distemper/parvo can be given as a 3 year vaccine, ONLY if the pet has stayed on a veterinarian recommended vaccine schedule.What do all of the letters mean in my pets âDistemperâ vaccination? Most distemper/parvo vaccines are in fact combo vaccines.ike rabies, after the first year, distemper/parvo can be given as a 3 year vaccine, ONLY if the pet has stayed on a veterinarian recommended vaccine schedule. What do all of the letters mean in my pets âDistemperâ vaccination? Most distemper/parvo vaccines are in fact combo vaccines.