HEI GL3812 Datasheet
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
-
-
-
-
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