Patohia: Clock/Calendar, Āhuahira: Alarm, Leap Year, Square Wave Output, SRAM, Rahinga Mahara: 64B, Hōpututanga Wā: HH:MM:SS (12/24 hr), Hōpututanga Ra: YY-MM-DD-dd, Atanga: I²C, 2-Wire Serial,
Patohia: Clock/Calendar, Āhuahira: Alarm, Leap Year, Square Wave Output, SRAM, Unique ID, Rahinga Mahara: 64B, 1Kb, Hōpututanga Wā: HH:MM:SS (12/24 hr), Hōpututanga Ra: YY-MM-DD-dd, Atanga: I²C, 2-Wire Serial,
Patohia: Clock/Calendar, Āhuahira: Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer, Rahinga Mahara: 64B, Hōpututanga Wā: HH:MM:SS:hh (12/24 hr), Hōpututanga Ra: YY-MM-DD-dd, Atanga: SPI,
Patohia: Clock/Calendar, Āhuahira: Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Rahinga Mahara: 64B, Hōpututanga Wā: HH:MM:SS:hh (12/24 hr), Hōpututanga Ra: YY-MM-DD-dd, Atanga: SPI,
Patohia: Clock/Calendar, Āhuahira: Alarm, Leap Year, Square Wave Output, SRAM, Unique ID, Rahinga Mahara: 64B, Hōpututanga Wā: HH:MM:SS (12/24 hr), Hōpututanga Ra: YY-MM-DD-dd, Atanga: I²C, 2-Wire Serial,
Patohia: Clock/Calendar, Āhuahira: Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Watchdog Timer, Rahinga Mahara: 64B, Hōpututanga Wā: HH:MM:SS:hh (12/24 hr), Hōpututanga Ra: YY-MM-DD-dd, Atanga: SPI,