Understanding BCD-to-7-Segment decoders

For one of the projects I have on my workbench I was using a BCD-to-7-segment decoder in form of a 74LS247N. While I was looking for some more detailed specifics about this circuit I got the impression that – although it’s a quite common and a more or less trivial one – not very much about it could be found on the internet (or maybe I was just not able to find it).

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