FEATURES
 Minimum Timekeeping supply voltage TYP:0.66 to 5.5v (Worst: 1.00V to 5.5v); VDD pin
 Low power consumption 0.45A TYP at VDD=3V (1.00A MAX.)
 Four signal lines (CE, SCLK, SI, and SO) required for connection to the CPU.
 Time counters (counting hours, minutes, and seconds) and calendar counters (counting years, months, days, and
weeks) (in BCD format)
 Interrupt circuit configured to generate interrupt signals (with interrupts ranging from 0.5 seconds to 1 month) to
the CPU and provided with an interrupt flag and an interrupt halt
 2 alarm interrupt circuits (Alarm_W for week, hour, and minute alarm settings and Alarm_D for hour and minute
alarm settings)
 With Power-on flag to prove that the power supply starts from 0V
 32-kHz clock output pin (N-channel open drain output)
 Supply voltage monitoring circuit with two supply voltage monitoring threshold settings
 Automatic identification of leap years up to the year 2099
 Selectable 12-hour and 24-hour mode settings
 High precision oscillation adjustment circuit
 Built-in oscillation stabilization capacitors (CG and CD)
 Package TSSOP10G (4.0mm x 2.9mm x 1.0mm: R2043T)
 FFP12 (2.0mm x 2.0mm x 1.0mm: R2043K)
 QFN023023-16(2.3mm x 2.3mm x 0.4mm: R2043L)
 CMOS process