Product Summary

The DS1339 serial real-time clock (RTC) is a lowpower
clock/date device with two programmable timeof-
day alarms and a programmable square-wave
output. Address and data are transferred serially
through an I2C* bus. The clock/date provides seconds,
minutes, hours, day, date, month, and year
information. The date at the end of the month is
automatically adjusted for months with fewer than 31
days, including corrections for leap year. The clock
operates in either the 24-hour or 12-hour format with
AM/PM indicator. The DS1339 has a built-in powersense
circuit that detects power failures and
automatically switches to the backup supply,
maintaining time and date operation.

Features

 Real-Time Clock (RTC) Counts Seconds, Minutes,
Hours, Day, Date, Month, and Year with Leap-
Year Compensation Valid Up to 2100
 Available in a Surface-Mount Package with an
Integrated Crystal (DS1339C)
 I2C Serial Interface
 Two Time-of-Day Alarms
 Programmable Square-Wave Output
 Oscillator Stop Flag
 Automatic Power-Fail Detect and Switch Circuitry
 Trickle-Charge Capability
 Underwriters Laboratory (UL) Recognized

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
DS1339U-33+T&R
DS1339U-33+T&R
Maxim Integrated Products
Real Time Clock I2C Serial RTC
Data Sheet
0-1: $1.99
1-25: $1.48
25-50: $1.45
50-100: $1.27
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
DS1300
DS1300
Other

Data Sheet
Negotiable 
DS1300-3
DS1300-3
Emerson / Astec Power
Linear and Switching Power Supplies 12V output, 1300W 2U x 3U x 7.5"
Data Sheet
0-4: $296.74
4-10: $285.51
10-25: $269.47
DS1301-7R
DS1301-7R

EURO-CASSETTE 100W 12V
Data Sheet
0-5: $629.64
DS1302
DS1302
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-6900: $1.20
DS1302+
DS1302+
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-1: $2.23
1-25: $1.50
25-50: $1.09
50-100: $1.07
DS1302N
DS1302N
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-6910: $1.49