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PI3V724

1 to 2 VGA Demux

Pinout Table

Pin #

Name

Type

Description

1

R

I/O

Red signal from source

2

G

I/O

Green signal from source

3

GND

Ground

Ground

4

Vdd

Power

3.3V Power Supply

5

B

I/O

Blue signal from source

6

H_Source

I

Horizontal Synchronous signal from source. Internal 300Kohm pull-down

7

V_Source

I

Vertical Synchronous signal from source. Internal 300Kohm pull-down

8

MS

I

Mode Select (switch between auto switch vs. manual switch). OUTx pins work

regardless of MS pin status. Internal pull down.

9

SDA_Source

I/O

DDC data signal from source

10

SCL_Source

I/O

DDC clock signal from source

11

Rref

I

Connect external resistor to ground to determine which application scheme

best matches your design. For actual R values, please see page 6

12

SDA1

I/O

DDC data signal from VGA connector 1

13

SDA2

I/O

DDC data signal from VGA connector 2

14

SCL1

I/O

DDC clock signal from VGA connector 1

15

SCL2

I/O

DDC clock signal from VGA connector 2

16

Vdd5_IN

I (Power)

5V input power supply

17

V2_out

O

Buffered, vertical synch signal output for VGA connector #2

18

V1_out

O

Buffered vertical synchronous signal driving VGA connector #1

19

H2_out

O

Buffered, horizontal synch signal output for VGA connector #2

20

H1_out

O

Buffered horizontal synchronous signal driving VGA connector #1

21

B2

I/O

Un-buffered, Blue signal driving VGA connector 2

22

B1

I/O

Un-buffered, Blue signal driving VGA connector 1

23

Vdd

Power

3.3V Power Supply

24

G2

I/O

Un-buffered, Green signal driving VGA connector 2

25

G1

I/O

Un-buffered, Green signal driving VGA connector 1

26

R2

I/O

Un-buffered, Red signal driving VGA connector 2

27

R1

I/O

Un-buffered, Red signal driving VGA connector 1

28

CE

I

Chip enable input. If signal is LOW, then chip is fully functional. If signal is

HIGH, then IC is powered down and all I/O’s are hi-z

29

OUT

O

open drain output describing external monitor status. If connected, OUT is

LOW, if not connected, OUT is hi-z. OUT will only provide the status of the

CHOSEN port.

Chosen port can be determined based on manual switching

or automatic switching (please see truth table for more information on how to

configure into auto mode or manual mode)

30

Priority/SEL

I

Output Port selection or output port priority depending on MS pin status

31

GND

Ground

Ground

32

Test

I

please tie high or leave floating for normal operation. internal pull-up

14-0168