Analog Devices / Maxim Integrated DS1337 Serial Real-Time Clock (RTCs)

Analog Devices DS1337 Serial Real-Time Clock (RTC) is a low-power clock/calendar with two programmable time-of-day alarms and programmable square-wave output. Address and data are transferred serially through an I²C bus. The clock/calendar provides information on seconds, minutes, hours, days, dates, months, and years. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for the leap year. The clock operates in a 24-hour or 12-hour format with AM/PM indicators.

The Analog Devices DS1337 Serial Real-Time Clock (RTC) is fully accessible through the serial interface, while VCC is between 1.8V and 5.5V. I²C operation is not guaranteed below 1.8V. Timekeeping operation is maintained with V_CC as low as 1.3V.

Features

Completely Manages All Timekeeping Functions
- Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Days, Dates, Months, and Years with Leap-Year Compensation Valid Up to 2100
- Two Time-of-Day Alarms
- Programmable Square-Wave Output Defaults to 32kHz on Power-Up
- Oscillator Stop Flag

Interfaces with Most Microcontrollers
- I²C Serial Interface
Surface-Mount Package with an Integrated Crystal (DC1337C) Saves Additional Space and Simplifies Design
-40°C to +85°C Industrial Temperature Range Supports Operation in a Wide Range of Applications