DS1339 Maxim, DS1339 Datasheet - Page 19

• Manufacturer Part Number: DS1339
• 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
• Manufacturer: Maxim

HANDLING, PCB 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.
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
CHIP INFORMATION
PROCESS: CMOS
PACKAGE INFORMATION
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages.
Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different
suffix character, but the drawing pertains to the package regardless of RoHS status.
TOP VIEW
PACKAGE TYPE
8 µSOP
V
16 SO
BACKUP
GND
X1
X2
µSOP
DS1339
V
SCL
SDA
SQW/INT
CC
PACKAGE CODE
W16#H2
U8+1
19 of 20
TOP VIEW
OUTLINE NO.
21-0036
21-0042
SQW/INT
SCL
V
N.C.
N.C.
N.C.
N.C.
N.C.
CC
SO (300 mils)
DS1339 I
DS1339C
2
LAND PATTERN NO.
C Serial Real-Time Clock
SDA
GND
N.C.
N.C.
N.C.
N.C.
N.C.
V
BACKUP
90-0092
90-0107