I designed a PCB using both NE5532 and OP177 opamps. In principle both opamps are in SOIC-8 packages. However when I received the opamps, I found the NE5532 are much larger than the footprint they were designed to have on the PCB (using the KiCad SOIC-8 3.9x4.9mm footprint).
If I measure the width of the NE5532 it appears to be wider than 5mm, while the datasheet says it shouldn't be wider than 4mm.
What has gone wrong here? Have I made a bad assumption somewhere? Or is this a faulty package?