Analog Devices
No picture yet
I2C real-time clock with battery backup and 56 bytes of NVRAM. Needs an external 32.768kHz crystal and drifts more than a DS3231.
| Part number | DS1307 |
|---|---|
| Manufacturer | Analog Devices |
| Category | Integrated Circuits › I/O Expander & Bus ICs |
| Package | DIP-8 |
| Pins | 8 |
| Frequency | 32.768 kHz |
DS1307 pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | X1 | clock | 32.768kHz crystal |
| 2 | X2 | clock | 32.768kHz crystal |
| 3 | VBAT | power | Backup battery |
| 4 | GND | ground | Ground |
| 5 | SDA | bidirectional | I2C data |
| 6 | SCL | bidirectional | I2C clock |
| 7 | SQW/OUT | output | Square wave output |
| 8 | VCC | power | Supply, 5V |
Schematic symbol and footprint
Schematic symbol
Footprint: DIP-8 — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.