How is the iPhone 5 lightniing connector all digital?

How is this digital connector different from the previous one?

It is just a term, it is different because you can plug it in both sides and they had to get a smaller charger to reduce the thickness of the next gen devices hope this answers your question

Since the first through fifth generation charging prong was a 28 pin connector, this new lightning connector allows for more energy to be transferred while using less power, so technically it's just an upgrade, something samsung has been doing for quite a while.