PT7C4337 View Datasheet(PDF) - Unspecified

Part Name

Description

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PT7C4337

Real-time Clock Module (I2C Bus)

Unspecified 

Data Sheet

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

Description

1

X1

I

Oscillator Circuit Input. Together with X2, 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 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.

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/INTB

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.

4

GND

P Ground.

PT0205(02/07)

3

Ver: 1

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