Maxim Integrated DS1339BU+, Real Time Clock Serial-I2C, 8-Pin μSOP

Completely Manages All Timekeeping Functions
Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
Two Time-of-Day Alarms
Programmable Square-Wave Output
Oscillator Stop Flag
Interfaces to Most Microcontrollers
I2C Serial Interface
Low-Power Operation Extends Battery Backup Run Time
Automatic Power-Fail Detect and Switch Circuitry
Trickle-Charge Capability

Surface-Mount Package with an Integrated Crystal (DS1339C Saves Additional Space and Simplifies Design
Applications
Consumer Electronics (Set-Top Box, Digital Recording, Network Appliance)
Handhelds (GPS, POS Terminal)
Medical (Glucometer, Medicine Dispenser)
Office Equipment (Fax/Printer, Copier)
Other (Utility Meter, Vending Machine, Thermostat, Modem)
Telecommunications (Router, Switcher, Server)