Rainbow Electronics DS1339 - Manual

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Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
http://www.maxim-ic.com/errata .
FEATURES
§ Real-time clock (RTC) counts seconds,
minutes, hours, day, date, month, and year
with leap-year compensation valid up to 2100
§ 2-wire serial interface
§ Two time-of-day alarms
§ Programmable square-wave output
§ Oscillator stop flag
§ Automatic power-fail detect and switch
circuitry
§ Trickle charge capability
ORDERING INFORMATION
PART
PIN-
PACKAGE
TOP MARK
DS1339U-2 8 µSOP 1339 ##-2
DS1339U-3 8 µSOP 1339 ##-3
DS1339U-33 8 µSOP 1339 ##-33
## = second line, revision code
2 = 2.0V, V
CC
±10%
3 = 3.0V, V
CC
±10%
33 = 3.3V, V
CC
±10%
PIN ASSIGNMENT (Top View)
Package Dimension Information
http://www.maxim-ic.com/TechSupport/DallasPackInfo.htm
PIN DESCRIPTION
V
CC
- Power Supply
X1, X2 - 32.768kHz Crystal Connection
GND - Ground
SDA - Serial Data
SCL - Serial Clock
V
BACKUP
- Secondary Power Supply
SQW/
INT
- Square-Wave/Interrupt Output
APPLICATIONS
§ Handhelds (GPS, POS Terminal)
§ Consumer Electronics (Set-Top Box, Digital
Recording, Network Appliance)
§ Office Equipment (Fax/Printer, Copier)
§ Medical (Glucometer, Medicine Dispenser)
§ Telecommunications (Router, Switcher,
Server)
§ Other (Utility Meter, Vending Machine,
Thermostat, Modem)
DS1339
Serial Real-Time Clock
www.maxim-ic.com
www.maxim-ic.com
DS1339
4
CPU
VCC
VCC
VCC
5
6
8 1 2
SDA
SCL
GND
X2 X1
VCC
RPU RPU
CRYSTAL
SQW /INT
VBACKUP
3
7
i
TYPICAL OPERATING CIRCUIT
8-Pin mSOP
SQW/
INT
X1
X2
GND
V
CC
SCL
SDA V
BACKUP