| Two 32-bit counters track time in seconds for >125 years One counter tracks real-time on system or battery power while battery input >2.5V One counter tracks elapsed time under system power and holds the count under battery power Clear function resets a selected counter to 0 Read/write serial port affords low pin count Maximum current drain <1µA with serial port disabled 1-byte protocol defines read/write, counter address, and software clear function Operating temperature range: -40°C to +85°C |