| Real-Time Clock Counts Seconds, Minutes, Hours, Day of Week, Date of Month, Month, Year, and Century Leap-Year Compensation Valid up to Year 2100 +2V to +5.5V Wide Operating Voltage Range SPI Interface: 4MHz at 5V; 1MHz at 2V 31 x 8-Bit SRAM for Scratchpad Data Storage Uses Standard 32.768kHz, 12.5pF Watch Crystal Low Timekeeping Current (400nA at 2V) Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock Registers or SRAM Ultra-Small 8-Pin 3mm x 3mm x 0.8mm TDFN Package Programmable Time/Date Polled ALARM Function No External Crystal Bias Resistors or Capacitors Required |