There is a SSOP-serial number on the packaging of this product that identifies it as being packaged in a case. normaloperation can occur at a frequency of 266MHz. There have been 2009 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.
ICS93777BF Features
ICS93777BF Applications
There are a lot of Integrated Device Technology (IDT) ICS93777BF application specific timer applications.