| 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 96-byte nonvolatile RAM for data storage Two time-of-day alarms—programmable on combination of seconds, minutes, hours, and day of the week 1Hz and 32.768kHz clock outputs Serial interface supports Motorola serial peripheral interface (SPI) serial data ports or standard 3-wire interface Burst mode for reading/writing successive addresses in clock/RAM Dual-power supply pins for primary and backup power supplies Optional trickle-charge output to backup supply 2.0V to 5.5V operation Optional industrial temperature range -40°C to +85°CAvailable in space-efficient 20-pin TSSOP package Underwriters Laboratory (UL) recognized |