DS1338 Maxim, DS1338 Datasheet - Page 15

• Manufacturer Part Number: DS1338
• Description: The DS1338 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM
• Manufacturer: Maxim

HANDLING, PCB LAYOUT, AND ASSEMBLY
The DS1338C 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. Exposure to reflow is limited to 2 times maximum.
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 RoHS and lead-free/RoHS packages may be reflowed using a reflow profile that complies with JEDEC J-STD-
020.
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-020 standard for moisture-
sensitive device (MSD) classifications.
PIN CONFIGURATIONS
CHIP INFORMATION
TRANSISTOR COUNT: 12,231
PROCESS: CMOS
THERMAL INFORMATION
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.
PACKAGE TYPE
TOP VIEW
8 SO
8 μSOP
16 SO
PART
8 µMAX
16 SO
8 SO
GND
V
X1
X2
BAT
SO, μSOP
THETA-J
1
2
3
4
(°C/W)
206.3
132
73
PACKAGE CODE
8
7
6
5
A
W16#H2
V
SQW/OUT
SCL
SDA
U8+1
CC
S8+4
THETA-J
(°C/W)
38
42
23
C
15 of 16
OUTLINE NO.
21-0041
21-0036
21-0042
TOP VIEW
SQW/OUT
SCL
N.C.
N.C.
N.C.
N.C.
N.C.
V
cc
DS1338 I
SO (300 mils)
DS1338C
LAND PATTERN NO.
2
C RTC with 56-Byte NV RAM
SDA
GND
N.C.
N.C.
N.C.
N.C.
N.C.
V
90-0096
90-0092
90-0107
BAT