Y2K Compliant +3V or +5V Operation 64-Bit Silicon Serial Number Power-Control Circuitry Supports System Power-On from Date/Time Alarm or Key Closure 32kHz Output for Power Management Crystal-Select Bit Allows RTC to Operate with 6pF or 12.5pF Crystal SMI Recovery Stack 242 Bytes Battery-Backed NV RAM Auxiliary Battery Input RAM Clear Input Century Register Date Alarm Register Compatible with Existing BIOS for Original DS1287 Functions Available as Chip (DS1685) or Stand-Alone Encapsulated DIP (EDIP) with Embedded Battery and Crystal (DS1687) Timekeeping Algorithm Includes Leap-Year Compensation Valid Through 2099 Applications Embedded Systems Network Hubs, Switches, Routers Security Systems Utility Meters
