Maxim Integrated DS1339AU+, Real Time Clock Serial-I2C, 8-Pin μSOP

Drop-In Replacement for DS1339
Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap-Year Compensation Up to 2200
Two Time-of-Day Alarms
Programmable Square-Wave Output
Supports Crystals with Up to 60kΩ ESR
Maintains Time Even During Power Outage with Backup Supply Pin
Automatic Power-Fail Detect and Switch Circuitry
Trickle-Charge Capability
Supports VCC from 1.8V to 5V
Oscillator Stop Flag
Oscillator Runs Down to 1.15V
Interfaces with a Wide Range of Microcontrollers
I2C Serial Interface

Applications
Consumer Electronics (Set-Top Box, Digital Recording, Network Appliance)
Handhelds (GPS, POS Terminals)
Medical (Glucometer, Medicine Dispenser)
Office Equipment (Fax/Printers, Copier)
Other (Utility Meter, Vending Machine, Thermostat, Modem)
Telecommunications (Routers, Switches, Servers)