DS1339 I2C Serial Real-Time Clock
HANDLING, PC BOARD LAYOUT, AND ASSEMBLY
The DS1339C package contains a quartz tuning-fork crystal. Pick-and-place equipment may be used, but
precautions should be taken to ensure that excessive shocks are avoided. Ultrasonic cleaning should be avoided
to prevent damage to the crystal.
Avoid running signal traces under the package, unless a ground plane is placed between the package and the
signal line. All N.C. (no connect) pins must be connected to ground.
The SO package may be reflowed as long as the peak temperature does not exceed 240°C. Peak reflow
temperature (≥ 230°C) duration should not exceed 10 seconds, and the total time above 200°C should not exceed
40 seconds (30 seconds nominal). Exposure to reflow is limited to 2 times maximum.
Moisture-sensitive packages are shipped from the factory dry-packed. Handling instructions listed on the package
label must be followed to prevent damage during reflow. Refer to the IPC/JEDEC J-STD-020B standard for
moisture-sensitive device (MSD) classifications.
PIN CONFIGURATIONS
TOP VIEW
TOP VIEW
SCL
SQW/INT
VCC
SDA
GND
VBACKUP
N.C.
DS1339C
VCC
SQW/INT
X1
X2
VBACKUP
N.C.
SCL
SDA
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
GND
ꢀSOP
CHIP INFORMATION
TRANSISTOR COUNT: 11,325
PROCESS: CMOS
THERMAL INFORMATION
THETA-JA
THETA-JC
PART
µSOP
CONDITIONS
(°C/W)
(°C/W)
229
73
39
Typical
SO
23
PACKAGE INFORMATION
For the latest package outline information, go to www.maxim-ic.com/DallasPackInfo.
18 of 18
Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product.
No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products S Printed USA
are registered trademarks of Maxim Integrated Products, Inc., and Dallas Semiconductor Corporation.
DALLAS [ DALLAS SEMICONDUCTOR ]
