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DS1339U-2+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
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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 I
2
C 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, date, and alarm 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)
I
2
C 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 Laboratories (UL) Recognized
Pin Configurations appear at end of data sheet.
ORDERING INFORMATION
PART
TEMP RANGE
VOLTAGE (V)
PIN-PACKAGE
TOP MARK†
DS1339C-2# -40°C to +85°C 2.0 16 SO (300 mils) DS1339C-2
DS1339C-3#
-40°C to +85°C
3.0
16 SO (300 mils)
DS1339C-3
DS1339C-33#
-40°C to +85°C
3.3
16 SO (300 mils)
DS1339C-33
DS1339U-2+ -40°C to +85°C 2.0
8 µSOP
1339 rr-2
DS1339U-3+ -40°C to +85°C 3.0
8
µ
SOP
1339 rr-3
DS1339U-33+ -40°C to +85°C 3.3
8 µSOP
1339 rr-33
+Denotes a lead(Pb)-free/RoHS-compliant package.
#Denotes a RoHS-compliant device that may include lead that is exempt under the RoHS requirements. The lead finish is JESD97 category
e3, and is compatible with both lead-based and lead-free soldering processes.
†A “+” anywhere on the top mark indicates a lead(Pb)-free device. A “#” denotes a RoHS-compliant device. rr = second line, revision code
DS1339
I
2
C Serial Real-Time Clock
19-5770; Rev 4/11
DS1339 I
2
C Serial Real-Time Clock
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ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground………………………………………………………………-0.3V to +6.0V
Operating Temperature Range (Noncondensing)………………………………………………………….-40°C to +85°C
Storage Temperature Range………………………………………………………………………………..-55°C to +125°C
Lead Temperature (soldering, 10s)...…………………………………………………………………………………+260°C
Soldering Temperature (reflow).……………………………………………………………………………………….+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
µSOP
Junction-to-Ambient Thermal Resistance (θ
JA
).…………………...……………………………………….206.3°C/W
Junction-to-Case Thermal Resistance (θ
JC
)……………………………………………………………………42°C/W
SO
Junction-to-Ambient Thermal Resistance (θ
JA
).……………………………………………………………….73°C/W
Junction-to-Case Thermal Resistance (θ
JC
)……………………………………………………………………23°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
RECOMMENDED DC OPERATING CONDITIONS
(T
A
= -40°C to +85°C) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
DS1339-2 1.8 2.0 5.5
V
DS1339-3 2.7 3.0 5.5
DS1339-33 2.97 3.3 5.5
Backup Supply Voltage V
BACKUP
1.3 3.0 3.7 V
Logic 1 V
IH
0.7 x
V
CC
V
CC
+
0.3
V
Logic 0 V
IL
-0.3
+0.3 x
V
CC
V
Power-Fail Voltage V
PF
DS1339-2 1.58 1.70 1.80
V DS1339-3 2.45 2.59 2.70
DS1339-33 2.70 2.85 2.97
DS1339 I
2
C Serial Real-Time Clock
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DC ELECTRICAL CHARACTERISTICS
(V
CC
= MIN to MAX, T
A
= -40°C to +85°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Leakage I
LI
(Note 3) 1
µA
I/O Leakage I
LO
(Note 4) 1
µA
Logic 0 Out
V
OL
= 0.4V; V
CC
> V
CC
MIN (-3, -33);
V
CC
≥ 2.0V (-2)
I
OL
(Note 4) 3 mA
Logic 0 Out
V
OL
= 0.2 (V
CC
);
1.8V < V
CC
< 2.0V (DS1339-2)
I
OL
(Note 4) 3 mA
Logic 0 Out
V
OL
= 0.2 (V
CC
);
1.3V < V
CC
< 1.8V (DS1339-2)
I
OL
(Note 4) 250
µA
V
CC
Active Current I
CCA
(Note 5) 450
µA
V
CC
Standby Current (Note 6) I
CCS
-2: V
CC
= 2.2V 60 100
µA
-3: V
CC
= 3.3V 80 150
-33: V
CC
= 5.5V 200
Trickle-Charger Resistor Register
10h = A5h, V
CC
= Typ, V
BACKUP
= 0V
R1 (Note 7) 250
Ω
Trickle-Charger Resistor Register
10h = A6h, V
CC
= Typ, V
BACKUP
= 0V
R2 2000
Ω
Trickle-Charger Resistor Register
10h = A7h, V
CC
= Typ, V
BACKUP
= 0V
R3 4000
Ω
V
BACKUP
Leakage Current I
BKLKG
25 100 nA
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 0V, T
A
= -40°C to +85°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
BACKUP
Current EOSC = 0, SQW Off
I
BKOSC
(Note 8) 400 700 nA
V
BACKUP
Current EOSC = 0, SQW On
I
BKSQW
(Note 8) 600 1000 nA
V
BACKUP
Current EOSC = 1
I
BKDR
10 100 nA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

DS1339U-2+

Mfr. #:
Buy DS1339U-2+
Manufacturer:
Maxim Integrated
Description:
Real Time Clock I2C Serial RTC
Lifecycle:
New from this manufacturer.
Delivery:
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