There is an embedded version in the package TSSOP.In these RTC times, there is a memory of 96B where data and programs can be stored.RTC time is recommended that the operating temperature be above -40°C.Lower than 85°C should be the operating temperature.
DS1305EN+T&R/C01 Features
TSSOP package
DS1305EN+T&R/C01 Applications
There are a lot of Maxim Integrated DS1305EN+T&R/C01 Real Time Clocks applications.