PT7C4337_13 Datasheet, PDF (2/23 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C4337
Real-time Clock Module (I²C Bus)
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Pin Assignment
PT7C4337
1 X1
VCC 8
2 X2
SQW/INTB ⁷
3 INTA
SCL 6
4 _GND
SDA ⁵
Pin Description
Pin No. Pin Type
1
X1
I
2
X2
O
6
SCL
I
5
SDA I/O
3
INTA O
7
SQW/I
NTB
O
8
VCC
P
4
GND
P
/
NC
DIP-8、SOIC-8
MSOP8
Description
Oscillator Circuit Input. Together with X1, 32.768kHz crystal is connected between them.
Or external clock input.
Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between
them. When 32.768kHz external input, X2 must be float.
Serial Clock Input. SCL is used to synchronize data movement on the I²C serial interface.
Serial Data Input/Output. SDA is the input/output pin for the 2-wire serial interface. The
SDA pin is open-drain output and requires an external pull-up resistor.
Interrupt Output. When enabled, INTA is asserted low when the time matches the values
set in the alarm registers. This pin is an open-drain output and requires an external pull up
resistor.
Square-Wave/Interrupt Output. Programmable square-wave or interrupt output signal. It
is an open-drain output and requires an external pull up resistor.
Power. Primary power for PT7C4337.
Ground.
No Connect. These pins are not connected internally, but must be grounded for proper
operation.
Maximum Ratings
Storage Temperature ............................................................ -65℃ to +150℃
Ambient Temperature with Power Applied ........................... -40℃ to +85℃
Supply Voltage to Ground Potential (V_CC to GND) ............... -0.3V to +6.5V
DC Input (All Other Inputs except Vcc & GND)^{......................................} -0.3V to (Vcc +0.3V)
DC Output Voltage (SDA, /INTA, /INTB pins)........................................-0.3V to +6.5V
DC Output Current (FOUT) ............................................... -0.3V to (Vcc +0.3V)
Power Dissipation .............................................320mW(depend on package)
Note:
Stresses greater than those listed under
MAXIMUM RATINGS may cause permanent
damage to the device. This is a stress rating
only and functional operation of the device at
these or any other conditions above those
indicated in the operational sections of this
specification is not implied. Exposure to
absolute maximum rating conditions for
extended periods may affect reliability.
2013-06-0002
PT0205-9 06/18/13
2