The PCF85063ATL/1,118 Real Time Clock (RTC) IC Clock/Calendar I²C, 2-Wire Serial 10-XFDFN Exposed Pad is a low-power integrated clock/calendar circuit. It was developed by NXP as a push-button battery-powered clock that can operate in real time for many years. The IC stores date and time data to an I2C or its binary format with an accuracy of one second. It features selectable time-of-day alarm and timer interrupt functions, and also supports extended functions such as time-stamp register, frequency output, trigger output, and timing functions. The minimal input power required is 1.1V and is customizable over the range of 1.1V to 5.5V. The IC is packaged in a 10-XFDFN Exposed Pad package.