For most parts, click on the accompanying picture to enlarge. This is something that happens when a manufacturer has an application that might call for a slightly different IC function than what is available in the data books.
Some devices are very close to standard parts.
Manufacturers have also done this to stifle reverse engineering. Possible ferrite core with reddish brown magnet wire. Five leads, two on one side. Likely an inductor. I've used similar in Tuned IR receivers.