DS1305 is a serial alarm real-time clock produced by Maxim. It has seconds, minutes, hours, date, month, week, year, and two programmable time alarm functions.
The DS1305 provides a full BCD clock/calendar with seconds, minutes, hours, day, date, month and year, plus automatic leap‑year correction. It operates from 2.0 V to 5.5 V and supports both standard 3‑wire and Motorola SPI serial interfaces.
The device includes dual‑power supply pins, an optional trickle‑charge circuit, two time‑of‑day alarms, and 96 bytes of battery‑backed non‑volatile RAM. It is offered in 16‑pin DIP and 20‑pin TSSOP packages, with industrial temperature grades available.
| Operating Voltage | 2.0 V to 5.5 V |
|---|---|
| Temperature Range | -40 °C to +85 °C (industrial) |
| Non‑volatile RAM | 96 bytes |
| Alarms | Two time‑of‑day alarms |
| Package Options | 16‑pin DIP (300 mil) or 20‑pin TSSOP (173 mil) |
The DS1305 operates from 2.0 V to 5.5 V.
The device provides 96 bytes of battery‑backed NV RAM.
Two time‑of‑day alarms can be programmed.
It is available in a 16‑pin DIP (300 mil) and a 20‑pin TSSOP (173 mil) package.