Real-time clock counts seconds, minutes, hours, date, month, day, year, and leap year to 2100
56-bytes general-purpose NV RAM
Accuracy > 2 minutes/month at 25oC
Automatic Power Management Circuitry
2-wire Serial Interface
Programmable Square Wave Output Signal
Uses <300nA in backup mode with oscillator running
Pin Number | Description |
1 | X1 – 32.768kHz Crystal Connection |
2 | X2 – 32.768kHz Crystal Connection |
3 | Vbat – +3V Battery Input |
4 | GND – Ground |
5 | SDA – Serial Data |
6 | SCLK – Serial Clock |
7 | SQW/OUT – Squarewave Output |
8 | Vcc – Primary Power Supply |