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IC BLOCK DIAGRAM & DESCRIPTION
IC480 LA7305-E(Video Signal Driver)
1
Vcc 5V
2
COMPOSITE IN
SQUEEZE SW
3
4
LETTER
BOX SW
5
MUTE SW
(ON/OFF)
6
C IN
7
GND
8
Y1 IN
9
(MIX/COM)
10
IN SW
11
Y2 IN
12
13
LPF SW
(OFF/ON)
MUTE SW
(ON/OFF)
14
Cb IN
15
16
Cr IN
18
GND
17
GND
36
35
34
33
COMPOSITE
OUT
32
GND
31
C OUT
30
C_DC OUT
29
GND
28
Y
OUT1
27
GND
26
GND
25
Y
OUT2
24
23
Cb OUT
22
GND
21
Cr OUT
19
20
GND
C_OFFSET
DC_CTL
CLAMP
CLAMP
CLAMP
2Step
Amp.
LPF
2Step
Amp.2
LPF1
2Step
Amp.3
2Step
Amp.5
2Step
Amp.4
LPF1
LPF2
LPF1
LPF2
LPF1
MIX
DRIVER
DRIVER
DRIVER
DRIVER
DRIVER
DRIVER
PEDEST
A
L
CLAMP
PEDEST
AL
CLAMP
2Step
Amp.6
LPF2
LPF1
PEDEST
A
L
CLAMP
REG
VCC
SYNC
SEP
IC481 MM1508XNRE(Switing)
6
IN1
4
IN2
1
5
GND
SW
3
Vcc
2 OUT
Clamp
Clamp
Bias
DRV.
6dB
IC495 NJM4556AL(Op. Amp.)
1
2
3
4
8
7
6
5
A
B
D,M,V Type
(Top View)
V(+)
V(-)
IC490,811,603 PST3627U(Op. Amp.)
OUT
GND
V
DD
C
D
2
1
GND
1
V
DD
OUT
C
D
2
4
3
3
4
R
D
Vref
PIN No.
1
2
3
4
PIN NAME
GND
V
DD
C
D
OUT
FUNCTIONS
GND Pin
V
DD
Pin / Voltage Detect Pin
Capacitor Connect Pin with Delay
Reset Signal Output Pin