Key facts
- Brand
- Maxim
- Model
- DS1306
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-10
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Maxim DS1306 Serial Alarm Real-Time Clock Datasheet
The DS1306 is a serial alarm real‑time clock that tracks seconds, minutes, hours, day, date, month and year, with automatic leap‑year handling and two programmable alarms. It offers 96 bytes of battery‑backed non‑volatile RAM and operates from 2.0 V to 5.5 V.
Key features include dual‑power supply pins, optional trickle‑charge circuitry, 1 Hz and 32.768 kHz clock outputs, and support for both SPI and standard 3‑wire serial interfaces. The device is available in 16‑pin DIP and 20‑pin TSSOP packages and can operate from –40 °C to +85 °C for industrial versions.
Maxim DS1306 specifications
| Operating Voltage | 2.0 V to 5.5 V |
|---|---|
| Temperature Range | -40 °C to +85 °C (industrial) |
| Package Options | 16‑pin DIP (300 mil) or 20‑pin TSSOP (173 mil) |
| NV RAM | 96 bytes, battery‑backed |
| Clock Outputs | 1 Hz and 32.768 kHz square‑wave outputs |
All Maxim DS1306 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What does the INTO pin do?
INTO is an active‑low interrupt 0 output that can be asserted by Alarm 0.
How is the trickle charger enabled?
The trickle charger is enabled by setting the TCS bits to the pattern 1010.
What temperature range can the DS1306 operate in for industrial use?
The DS1306 operates from –40 °C to +85 °C in industrial temperature range.
How many programmable alarms does the DS1306 provide?
It provides two time‑of‑day alarms that can generate interrupt signals.