DS1372 Maxim, DS1372 Datasheet - Page 4

• Manufacturer Part Number: DS1372
• Description: The DS1372 is a 32-bit binary up counter and 24-bit down counter with a unique 64-bit ID
• Manufacturer: Maxim

I
Figure 1. Block Diagram
4
2
GND
SDA
SCL
AD0
_______________________________________________________________________________________
V
C, 32-Bit, Binary Counter Clock with 64-Bit ID
PIN
1, 2
X1
X2
CC
3
4
5
6
7
8
SQW/
NAME
X1, X2
GND
AD0
SDA
SCL
V
CC
OSCILLATOR
INTERFACE
POWER
I
2
C
Connections for Standard 32.768kHz Quartz Crystal. The internal oscillator circuitry is designed for
operation with a crystal having a 12.5pF specified load capacitance (C
oscillator and can optionally be connected to an external 32.768kHz oscillator. The output of the
internal oscillator, pin X2, is floated if an external oscillator is connected to pin X1.
Slave Address Input. This pin is the slave address input for the I
access multiple devices on the same bus. To select the device, the address value on the pin
must match the corresponding bit in the device addresses. This pin can be connected to V
ground or be driven to a logic-high or logic-low level.
Ground
Serial Data Input/Output. This pin is the data input/output for the I
open drain and requires an external pullup resistor.
Serial Clock Input. This pin is the clock input for the I
data movement on the serial interface.
Square Wave or Active-Low Interrupt Open-Drain Output. This pin is used to output the square wave
or alarm interrupt signal. The function of this pin is selected by the state of the INTCN control bit.
This pin is open drain and requires an external pullup resistor.
DC Power Pin. This pin should be decoupled using a 0.1μF or 1.0μF capacitor.
÷4
CONTROL/
64-BIT ID
STATUS
ROM
DIVIDER CHAIN
÷2
÷4096
÷4096
FUNCTION
32,768Hz
8192Hz
4096Hz
CLR
1Hz
1Hz
2
RS[2:1]
C serial interface and is used to synchronize
MUX
24-BIT ALARM
COUNTER
COUNTER
32-BIT
ACE
SQW
2
2
C serial interface and is used to
C serial interface. The SDA pin is
AF
L
INTCN
DS1372
). Pin X1 is the input to the
MUX
Pin Description
N
SQW/INT
CC
or