Datasheet GL3812 Datasheet (HEI)

1

SWITCH FOR TV, VCR

2 3 4 5 6 7 10 9 8 11 22

20

18 17 16 13 14 15 12

Functions Pin Configuration

• Audio Signal Switching

• Video Signal Switching

• Input Signal Selecting Logic

Features

•

Possible to Switch 4 Channel Video Signals

•

Possible to Switch 4 Channel L & R Audio Signals

Absolute Maximum Ratings ( CT

V Supply Voltage

Power Dissipation
Operating Temperature

Storage Temperature

1CC

V

2CC

P 310mW

D

T -20 to C°70+

OPR

T -55 to

STG

A

°= 25 )

15V

AUDIO-IN LCH(V1)

AUDIO-IN, LCH(V2)

AUDIO-IN, LCH(V3)

AUDIO-IN, RCH(V2)
AUDIO-IN, RCH(V3)

C°125+

AUDIO-IN, RCH(V1)

VIDEO-IN(V1)

V

CC

VIDEO-IN(V2)

GND

MODE-IN(C0)

1

GL3812

GL3812

GL3812

AUDIO/VIDEO

AUDIO-IN, LCH(TV)

21

AUDIO-IN, RCH(TV)
V

CC2

19

VIDEO-IN(TV)
AUDIO-OUT LCH
AUDIO-OUT RCH
VIDEO-OUT

MODE-OUT TV/LOW

MODE-OUT, V3/HIGH
MODE-IN(C1)

VIDEO-IN(V3)

Mode Selection Logic/Output Signal

C1 C0 PIN 14 PIN15 PIN 16 PIN 17 PIN 18

L L L L VIDEO (TV) AUDIO RCH(TV) AUDIO LCH(TV)
L H L H VIDEO (
H L L H VIDEO (
H H H H VIDEO (

V ) AUDIO RCH(1V ) AUDIO LCH(1V )

1

V ) AUDIO RCH(2V ) AUDIO LCH(2V )

2

V ) AUDIO RCH(3V ) AUDIO LCH(3V )

3

2

BUFFER

BUFFER

BUFFER
VIDEO AMP

AUDIO

AMP(LCH)

AUDIO

AMP(RCH)

BUFFER

BUFFER

VIDEO OUT
MOD

IN(CO)

MODE

IN(C1)

OUT, LCH

AUDIO

OUT, RCH
VIDEO

IN, V

VIDEO

IN, V

VIDEO

IN, V

VIDEO

IN, TV
AUDIO

IN, V

AUDIO

IN, V

AUDIO

IN, V

AUDIO

IN, TV

AUDIO

IN, V

AUDIO

IN, V

AUDIO

IN, V

AUDIO

IN, TV

LCH RCH GND

Block Diagram

GL3812

16

MODE-IN
INTERFACE

BUFFER

20
8

DECODER

15 14

7

8

12

19

1

2

3

-

-

-

-

-

E-

11

13

1

1 3 2

1

2

-

-

-

18

22

3

-

-

-

17

10

4

5

6

21

3

1

2

-

-

-

-

3

15 20

10 —

—

20 —

15 20
—

Ω

50 —
60 —
—- —
12 14

—

20 —

15 20
—
60 —
70 —

—

— —

—

— —

GL3812

Electrical Characteristics: ,C°25=

Current Dissipation

Video Channel Bandwidth

Video Signal Voltage Gain

Video Signal
Input Dynamic Range

Video Channel PSRR

Video Channel Input Impedance
Video Channel Output Impedance
Video Channel Crosstalk
Video Channel S/N
Audio Channel Bandwidth
Audio Signal Voltage Gain

Audio Signal
Input Dynamic Range

Audio Channel PSRR

Audio Channel Input Impedance
Audio Channel Output Impedance
Audio Channel Crosstalk
Audio Channel S/N
Audio Signal THD

Input Mode Selection
Threshold Voltage

PIN 14 (
Low Level Voltage

PIN 14 (
High Level Voltage

PIN 15 (TV/L)
Low Level Voltage

PIN 15 (TV/L)
High Level Voltage

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT

V /H)

3

V /H)

3

T V12=

A

I V12=V=V

F -3dB Frequency

V

A f=500 kHz,

V

D

V

PS

R

IV

R

OV

CT f=3.58 MHz,
SN
F -3dB frequency

A

A f=1 kHz,

a

D

a

PS

a

R

ia

R

oa

CT f=1 kHz

a

SN
THD f=1 kHz,

V

MTH

V

V

V TV mode selection

V

2,1CC

V

V
V

a

a

TV,L

TV,H

3V,L

3V,H

V

CC

f=500 kHz,
THD < 1 %

V

1CC

Sine Wave (50Hz/60Hz)

V

out

f=1 kHz
THD < 1 %

V

2CC

Sine Wave (50Hz/60Hz)

V

OUT

TV or 1V or 2V
1 mode selection

V mode selection

3

V or 2V or 3V

1

1 mode selection

2CC1CC

V2=

p.p

V2=

p.p

V

OUT

V1+V12=

V1+V12=

V1V =

p.p

V1=INV

V5.0=INV

p.p

p.p

V2=

p.pIN

p.p

p.p

10

5

5.0

1.7

15

10

— 200
40
50

100

10

0.7

15

10

— 200
50
60

— 0.5

2.0

—

10

—

10

6.0

2.0

1.0

2.3

mA

MHz

7.0 dB

V

DB

K Ω

DB
DB

KHz

DB

V

DB

KΩ

Ω

DB
DB

1.5 %

2.6 V

0.5 V

V

0.5 V

V

p.p

p.p

4

Pin Description

V

No. Name Explanation No. Name Explanation

1 AUDIO-IN (

2 AUDIO-IN (

3 AUDIO-IN (

4 AUDIO-IN (

5 AUDIO-IN (

6 AUDIO-IN (

7 VIDEO-IN (

8

9 VIDEO-IN (

10 GND 21 AUDIO-IN (R-TV) Input of R-CH Audio
11 MODE-IN (C0) Input for Mode Selection.

L ) Input of L-Ch Audio Signal

1

for Video (

L ) Input of L-Ch Audio Signal

2

for Video (

L ) Input of L-Ch Audio Signal

3

for Video (

R ) Input of R-Ch Audio Signal

1

for Video (

R ) Input of R-Ch Audio Signal

2

for Video (

R ) Input of R-Ch Audio Signal

3

for Video (

V ) Input of V Video Signal. 18 AUDIO-OUT (L) Output of Selected L-CH

1

Power Supply for Video

1CC

V ) Input of video Signal. 20

and Logic Block.

2

V ).

1

V ).

2

V ).

3

V ).

1

V ).

2

V ).

3

13 MODE-IN (C1) Input for Mode

Selection

14 MODE-OUT (

15 MODE-OUT (TV/L) Output Voltage of this Pin

16 VIDEO-OUT Output of Selected Video

17 AUDIO-OUT(R) Output of Selected R-CH

19 VIDEO-IN (TV) Input of TV Video Signal

V Power Supply for Audio

V /H) Output Voltage of this Pin

3

2CC

Becomes High State,
Only when
Else Low State

Becomes Low State, Only
when TV is selected.
Else High State.

Signal

Audio Signal

Audio Signal

Block

Signal for Video (TV).

GL3812

V is Selected

3

12 VIDEO-IN (

V ) Input of V Video Signal.

3

22 AUDIO-IN (L-TV) Input of L-CH Audio

Signal for Video (TV).

5

Test Circuit

10µF/50V

10µF/50V

10µF/50V

µF/50V

+

5V 50 50 1K 1K 10K

50

+

µF/50V

1µF/50V

+

+

35K AUDIO SIGNAL IN

LCH 75

75

1µF/50V

µF/50V

+

+

50

µF/50V µF/50V

+

+

75

75

µF/50V µF/50V

+

+

µF/50V

1

2

5

7 8 9

11

12

13

14

15

16

17

18

19

20

21

22

10

GL3812

35K

GL3812

×2

×3

6

Application Circuit

1

10 9 8 7 6 5 4

3

22

21

13

14

15

16

17

18

19

20

12 2 1M

35K

1ì F

1M

35K

1ì F

1M

35K

1M

35K

1ì F

1M

35K

1ì F

1M

35K

75

11

75

10ì F

75

75

1M

35K

1ì F

10ì F

1M

35K

1ì F

GL3812

GL3812

* In case of not using Pin 14 or 15, Connect to Ground.

In case of not using Pin 11, Connect to VCC.
In case of not using Pin 13, Connect to Ground.