There have been 2013 publications of this part. If you want to mount it with Surface Mount, that's what you should do. Circuits application is essential that the minimum working temperature of this device not be below 0°C. Temperatures below 70°C degrees Celsius should be used.
ICS9LPRS397EKLF Features
ICS9LPRS397EKLF Applications
There are a lot of Integrated Device Technology (IDT) ICS9LPRS397EKLF application specific timer applications.