I looked at the datasheet and it doesn't show a middle ground paddle on the bottom of the package. But pictures on Digikey suggest there is a ground paddle on the bottom that needs to be soldered. So I looked at the gerbers on the example test board and it indicates there is a solder mask opening for .09x.08 for soldering of a ground paddle.
Is the datasheet missing the ground paddle dimensions or the ground paddle does not exist on the part?
This appears to be a high isolation switch so I assume there must be a ground paddle on the package.
Rod Calabio
Daico Industries
rcalabio@daico.com