DS1307 64 x 8 Serial Real-Time Clock (I2C)
64 x 8, Serial, I2C Real-time clock, 4.5V to 5.5V VCC, 0°C to +70°C, DIP-8
Aliase:DS1307, DS1307N, I2C RTC, Real Time Clock
DIP-8 Top View
8 Pins
Pin-Tabelle8
| Pin | Signal / Name | Typ | Alternative Funktionen |
|---|---|---|---|
| 1 | X1 | Digital | Crystal Oscillator Input — connect 32.768kHz crystal; load capacitors per crystal spec |
| 2 | X2 | Digital | Crystal Oscillator Output — connect to crystal only; do not load |
| 3 | VBAT | Power | Backup Battery Input (2.5V–3.5V, e.g. CR2032 via diode); maintains timekeeping when VCC is absent or below 1.25×VBAT |
| 4 | GND | Ground | System Ground (0V) |
| 5 | SDA | Digital | I2C Serial Data Line (requires 4.7kΩ pull-up; address fixed at 0x68) |
| 6 | SCL | Digital | I2C Serial Clock Line (max 100kHz) |
| 7 | SQW/OUT | Digital | SQW — Square Wave Output (open-drain; programmable: 1Hz, 4.096kHz, 8.192kHz, 32.768kHz; requires pull-up)OUT — General-Purpose Output bit (when SQW disabled; level set by OUT bit in control register) |
| 8 | VCC | Power | Positive Power Supply |