How did this happen? This is horrible. Is there any good reason why they are different??
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The package is standardized, the device in side is unique. Usuallyt eh internal device dictates the pin # association and isnt something a manufacturer can choose since the same die needs to be inserted in many packages, and tools for cross-wiring and other things have tons of problems (not the least of which being that its expensive.
You will find that while these pinouts are referred to as the japanese, american, and european "standards" they arent. In fact even when standards are attempted they disagree with this (for example its common for NPN adn PNP to have reverse pinouts).
