DS1339 Datasheet, PDF (1/18 Pages) Dallas Semiconductor – Serial Real-Time Clock

DS1339
I²C Serial Real-Time Clock
www.maxim-ic.com
GENERAL DESCRIPTION
The DS1339 serial real-time clock (RTC) is a low-
power clock/date device with two programmable time-
of-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 power-
sense circuit that detects power failures and
automatically switches to the backup supply,
maintaining time and date operation.
APPLICATIONS
Handhelds (GPS, POS Terminals)
Consumer Electronics (Set-Top Box, Digital
Recording, Network Appliance)
Office Equipment (Fax/Printers, Copier)
Medical (Glucometer, Medicine Dispenser)
Telecommunications (Routers, Switches, Servers)
Other (Utility Meter, Vending Machine, Thermostat,
Modem)
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
Pin Configurations appear at end of data sheet.
*I²C is a trademark of Philips Corp. Purchase of I²C components
from Maxim Integrated Products, Inc., or one of its sublicensed
Associated Companies, conveys a license under the Philips I²C
Patent Rights to use these components in an I²C system, provided
that the system conforms to the I²C Standard Specification as
defined by Philips.
ORDERING INFORMATION
PART
DS1339C-2
DS1339C-2+
DS1339C-3
DS1339C-3+
DS1339C-33
DS1339C-33+
DS1339U-2
DS1339U-3
DS1339U-3+
DS1339U-33
DS1339U-33+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
+ Denotes a lead-free/RoHS-compliant device.
## = second line, revision code
2 = 2.0V (VCC ±10%)
3 = 3.0V (VCC ±10%)
33 = 3.3V (VCC ±10%)
* A “+” on the top mark indicates a lead-free device.
VOLTAGE (V)
2.0
2.0
3.0
3.0
3.3
3.3
2.0
3.0
3.0
3.3
3.3
PIN-PACKAGE
16 SO (300 mils)
16 SO (300 mils)
16 SO (300 mils)
16 SO (300 mils)
16 SO (300 mils)
16 SO (300 mils)
8 mSOP
8 mSOP
8 mSOP
8 mSOP
8 mSOP
TOP MARK*
DS1339C-2
DS1339C-2
DS1339C-3
DS1339C-3
DS1339C-33
DS1339C-33
1339 ##-2
1339 ##-3
1339 ##-3
1339 ##-33
1339 ##-33
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