| Order | Package version | resolution | Interface | VDD (interface) (V) | watchdog timer | Programmable alarm | countdown timer | VDD (clock) (V) | Leap year tracking | IDD (nA) | temperature compensation | Tamb (Cel) | AEC-Q100 compliant |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCA2129T | |||||||||||||
| PCF2127 | SOT163-1, SOT162-1 | 1 sec to year | I2C, SPI | 1.8 to 4.2 | yes | yes | yes | 1.8 to 4.2 | yes | 700 | yes | -40 to +85 | no |
| PCF2129 | SOT162-1, SOT163-1 | 1 sec to year | I2C, SPI | 1.8 to 4.2 | yes | yes | no | 1.8 to 4.2 | yes | 700 | yes | -40 to +85 | no |
