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General Description
The DS1372 is a 32-bit binary up counter and 24-bit
down counter with a unique 64-bit ID. The counters, ID,
configuration, and status registers are accessed using
an I2C serial interface. The DS1372 includes a
SQW/INT open-drain output that can output either a
square wave at one of four predefined frequencies, or it
can output an active-low signal when the 24-bit down
counter reaches 0.
Applications
Portable Audio and Video Players
Features
Compliant with Microsoft Windows Media DRM
10 for Portable Devices
32-Bit Binary Counter
Programmable Alarm
64-Bit Factory-Programmed ID
Interrupt Output
I2C Serial Interface
Two Selectable I2C Addresses
2.4V to 5.5V Operating Voltage Range
1.3V to 5.5V Timekeeping Operating Range
-40°C to +85°C Operating Temperature Range
8-Pin SOP
DS1372
________________________________________________________________
Maxim Integrated Products
1
1
2
3
4
8
7
6
5
VCC
SQW/INT
SCL
SDA
GND
AD0
X2
X1
DS1372
μSOP
TOP VIEW
+
Pin Configuration
Ordering Information
SCL
SDA
SQW/INT
GND
RPU
RPU = tR / CB
RPU
CPU
VCC
X1
X2 VCC
CRYSTAL
VCC
DS1372
AD0
Typical Operating Circuit
Rev 0; 7/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+
Denotes a lead-free package. This symbol also appears on the
top mark.
Windows Media is a registered trademark of Microsoft Corp.
PART
TEMP RANGE
PIN-PACKAGE
TOP
MARK
DS1372U+
-40
°C to +85°C
8 μSOP
1372
I2C, 32-Bit, Binary Counter Clock with 64-Bit ID
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