Time Keeping: Seconds, minutes, hours, day, month, year; leap-year compensated
Calendar Valid: Year 2100
Accuracy: ±2 minutes/year (±3.5 ppm) over the operating temperature range -40˚C to +85˚C
Time-of-Day Alarm: Two user programmable, assignable to 1-of-8 GPIO (8-bit) pins
Control Bus: I2C
Battery Back-Up: Low power battery back-up; user replaceable CR1220 3 volt lithium coin cell
Time Keeping Battery Current/Duration: 3 µA/1-year typical @ 20˚C
State Indicator: Power ON green LED
Power: +5 VDC @ 7 mA
Maximum Installed Modules: 10



