There is an embedded version in the package TSSOP.Packaged as Tape & Reel (TR).RTC time is recommended that the operating temperature be above -40°C.Lower than 85°C should be the operating temperature.
DS1306EN+T&R/C04 Features
TSSOP package
DS1306EN+T&R/C04 Applications
There are a lot of Maxim Integrated DS1306EN+T&R/C04 Real Time Clocks applications.