PT7C4307_13 Datasheet, PDF (2/15 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C4307
Real-time Clock Module (I²C Bus)
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Pin Assignment
PT7C4307
1 X1
VCC 8
2 X2
SQW/OUT 7
3 VBAT
SCL 6
4 _GND
SDA ⁵
DIP-8
SOIC-8
Pin Description
Pin no.
Pin
Type
Description
1
X1
I Oscillator Circuit Input. Together with X2, 32.768kHz crystal is connected between them.
2
X2
O
Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them.
When 32.768kHz external input, X2 must be float.
6
SCL
I Serial Clock Input. SCL is used to synchronize data movement on the I²C serial interface.
5
SDA
I/O
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.
7
SQW/OUT
O
Square Wave/Output Driver. Open drain. Four frequencies selectable: 32.768k, 8.192k,
4.096k, 1Hz when SQWE bit is set to 1.
8
VCC
P Power. Primary power for PT7C4307.
3
VBAT
P +3V Battery Power.
4
GND
P Ground.
2013-06-0002
PT0206-5 06/18/13
2