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Real-time Clock Module

2015-12-0001

PT0280-8

12/11/15

2

PT7C43390/43390C

Pin Configuration

1

2

3

INT1

4

PT7C43390

SOIC-8L

XIN

XOUT

GND

8

7

6

5

INT2

SCL

SDA

VDD

1

INT1

PT7C43390C

TDFN4x4-8L

NC2

NC1

GND

INT2

SCL

SDA

VDD

4

2

3

8

5

7

6

GND

P

2

P

1

INT1

4

PT7C43390

TSSOP-8L

XIN

XOUT

GND

INT2

SCL

SDA

VDD

3

2

1

5

6

7

8

INT1

PT7C43390

TDFN2x3-8L

XIN

XOUT

GND

INT2

SCL

SDA

VDD

2

1

4

3

7

8

5

6

Pin Description

Pin No.

Pin

Name

Type

Description

43390

43390C

1

1

INT1

O

Output for Interrupt Signal 1. This pin outputs a signal of interrupt, or a clock pulse. By

using the status register 2, users can select either of: alarm 1 interrupt, output of user-set

frequency, per-minute edge interrupt, minute-periodical interrupt 1, minute-periodical

interrupt 2, or 32.768 kHz output. This pin has NCH open drain output.

2

-

XOUT

O

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

them. When 32.768kHz external input, X2 must be float.

-

2

NC1

-

No connected.

3

-

XIN

I

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

them. Or external clock input.

-

3

NC2

-

No connected.

4

4

VSS

P

Negative power supply pin. Connects to GND.

5

5

INT2

O

Output for Interrupt Signal 2. This pin outputs a signal of interrupt, or a clock pulse. By

using the status register 2, users can select either of: alarm2 interrupt, output of user-set

frequency, or minute-periodical interrupt 1. This pin has NCH open drain output.

6

6

SCL

I

Serial clock input pin. This pin is to input a clock pulse for I

pin inputs/outputs data by synchronizing with the clock pulse.

7

7

SDA

I/O

Serial Data Input/Output. This is a data input / output pin of I

inputs / outputs data by synchronizing with a clock pulse from the SCL pin. This pin has

potential via a resistor, and connect it to any other device having open drain or open

collector output with wired-OR connection.

8

8

VDD

P

Positive power supply pin. Connect this VDD pin with a positive power supply.