DS1395 - RAMified Real Time Clock

VDD, VSS

Bus operational power is supplied to the part via these pins.

The voltage level present on these pins should be monitored to transition between operational power and battery power.

Data Bus (bidirectional): Data is written into the device from the data bus if eith

• Ideal for EISA bus PCs.
• Functionally compatible with MC146818 in 32 KHz mode.
• Totally nonvolatile with over 10 years of operation in the absence of power.
• Self-contained subsystem includes lithium, quartz, and support circuitry.
• Counts seconds, minutes, hours, day of the week, date, month, and year with leap year compensation.
• Binary or BCD representations of time, calendar, and alarm.
• 12- or 24-hour clock with AM and PM in 12-hour.