DS12887A - Real Time Clock

AD0-AD7 NC MOT CS AS R/ W DS RESET IRQ SQW VCC RCLR GND - Multiplexed Address/Data Bus - No Connection - Bus Type Selection - Chip Select - Address Strobe - Read/Write Input - Data Strobe - Reset Input - Interrupt Request Output - Square Wave Output - +5 Volt Supply - RAM Clear - Ground DESCRIP

• Drop.
• in replacement for IBM AT computer clock/calendar.
• Pin compatible with the MC146818B and DS1287A.
• 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, days, day of the week, date, month, and year with leap year compensation valid up to 2100.
• Binary or BCD representation of time, calendar, and alarm.
• 12.