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2013-06-0002

PT0205-9

06/18/13

2

PT7C4337

Real-time Clock Module (I

Pin Assignment

X2

INTA

GND

VCC

SQW/INTB

SCL

6

7

8

1

2

3

X1

4

5

SDA

PT7C4337

DIP-8、SOIC-8

MSOP8

Pin Description

Pin No.

Pin

Type

Description

1

X1

I

Oscillator Circuit Input. Together with X1, 32.768kHz crystal is connected between them.

Or external clock input.

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 I

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.

3

INTA

O

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.

7

SQW/I

NTB

O

Square-Wave/Interrupt Output. Programmable square-wave or interrupt output signal. It

is an open-drain output and requires an external pull up resistor.

8

VCC

P

Power. Primary power for PT7C4337.

4

GND

P

Ground.

/

NC

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℃

DC Input (All Other Inputs except Vcc & GND)

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.