DS1307
Every spec below is cited to the manufacturer datasheet. Pick your exact ordering code, compare the closest alternatives, then ask the assistant what it means for your design.
What the DS1307 family does
The DS1307 is a 64 x 8 bit serial real-time clock with 56 bytes of battery-backed SRAM. It spans commercial, industrial, and military temperature grades in 8-pin DIP and SO packages. The device operates on a 4.5V to 5.5V supply, supports clock frequencies up to 100 kHz, and draws less than 500 nA in battery backup mode. It counts seconds through years with leap-year compensation and automatically switches to a backup supply during power failures. Engineers typically use this component for timekeeping in microcontroller applications requiring low power consumption and simple I2C interfaces.
DS1307 datasheet parameters
| Parameter | Min | Typ | Max | Conditions | Source |
|---|---|---|---|---|---|
| supply voltage range | 4.5 V | 5 V | 5.5 V | RECOMMENDED DC OPERATING CONDITIONS | ADI datasheet, p. 2 — RECOMMENDED DC OPERATING CONDITIONS |
| operating temperature | 0 °C | — | 70 °C | Commercial grade (noncondensing) | ADI datasheet, p. 2 |
| clock frequency | — | 32.8 kHz | — | ADI datasheet, p. 7 — Table 1. Crystal Specifications | |
| standby current | — | — | 200 µA | (Note 3); DC ELECTRICAL CHARACTERISTICS | ADI datasheet, p. 2 — DC ELECTRICAL CHARACTERISTICS |
| rise time | — | — | 1 µs | AC ELECTRICAL CHARACTERISTICS | ADI datasheet, p. 3 — AC ELECTRICAL CHARACTERISTICS |
| fall time | — | — | 300 ns | AC ELECTRICAL CHARACTERISTICS | ADI datasheet, p. 3 — AC ELECTRICAL CHARACTERISTICS |
| load capacitance | — | 12.5 pF | — | ADI datasheet, p. 7 — Table 1. Crystal Specifications |