MAX1668 does not have exposed pad.
Link to create footprint - https://vendor.ultralibrarian.com/Maxim/Embedded?vdrPN=MAX1668MEE%2B
MAX1668
Production
The MAX1668/MAX1805/MAX1989 are precise multichannel digital thermometers that report the temperature of all remote sensors and their own packages. The...
Datasheet
MAX1668 on Analog.com
MAX1668 does not have exposed pad.
Link to create footprint - https://vendor.ultralibrarian.com/Maxim/Embedded?vdrPN=MAX1668MEE%2B