PT7C4337A Datasheet, PDF (2/25 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C4337A/4337AC
Real-time Clock Module (I²C Bus)
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pin Assignment
PT7C4337A
1 X1
VCC 8
2 X2
SQW/INTB 7
3 INTA
SCL 6
4 _GND
SDA ⁵
SOIC-8, MSOP-8,
TDFN-8, TSSOP-8
PT7C4337AC
1 SCL
SDA 16
2 SQW/INTB GND 15
3 VCC
INTA 14
4 _NC
5 NC
NC ¹³
NC 12
6 NC
NC 11
7 NC
NC 10
8 _NC
NC ⁹
SOIC-16
PT7C4337AC
NC ¹
8 _VCC
NC 2
7 SQW/INTB
INTA ³
GND 4
6 _SCL
5 SDA
DFN4x4-8L
Pin Description
Pin No.
4337A
4337AC
SOIC
4337AC
DFN
Pin
Type
1
/
/
X1
I
2
/
/
X2
O
6
1
6
SCL
I
5
16
5
SDA I/O
3
14
3 ^INTA O
7
2
7 ^SQW/ O
INTB
8
3
8 VCC P
4
15
4 GND P
/ 5-13 1, 2 NC
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 PT7C4337A.
Ground.
No Connect. These pins are not connected internally, but must be grounded for
proper operation.
2014-10-0002
PT0480-2 11/03/14
2