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TH-A75
4.19 LA73054-X (IC231) : Video driver
• Pin layout & Block diagram
36
35
2Step
Amp1
CLAMP
1
2
• Pin function
Pin No.
Symbol
1
2
COMPOSITE.IN
3
SQUEEZE.SW
4
LETTER-BOX.SW
5
MUTE-SW-1
6
7
GND11
8
9
YC-MIX.SW
10
SIGNAL-IN.SW
11
12
MUTE-SW-2
13
LPF.SW
14
15
AMP.SW-2
16
17
GND12
18
19
DRIVE.SW-2
20
GND26
21
CR.OUT
22
GND25
23
CB.OUT
24
25
Y-OUT-2
26
GND24
27
GND23
28
Y-OUT-1
29
GND22
30
C-DC.OUT
31
32
GND21
33
COMPOSITE-OUT
34
35
DRIVE.SW-1
36
AMP.SW-1
1-36 (No.22009)
34
33
32
31
30
75
75
DRIVER
DRIVER
LPF
Y/C
C_OFFSET
MIX
DC_CTL
LPF1
2Step
Amp2
3
4
5
6
7
I/O
VCC1
-
VCC except for 75ohm driver
I
Input composite
I
Selecting squeeze mode
I
Selecting letter-box mode
I
Composite/S signal mute selection
C-IN
I
Input Chroma signal
-
Composite/S GND except for 75ohm driver
Y-IN-1
I
Input Y signal
I
Selecting of doing Y/C-MIX or not
I
Selection of a kind of signal
Y-IN-2
I
Input component Y or baseband signal
I
Component signal mute selection
I
Selection of a kind of component LPF
CB.IN
I
Input component or baseband signal
I
Selecting amplifier gain for component signal
CR.IN
I
Input component or baseband signal
-
Component GND except for 75ohm driver
REG
O
Capacitor terminal for regulator
I
2drive/1drive select for component signal
-
CR-GND for 75ohm driver
O
75ohm driver output of pin16 input
-
CB-OUT for 75ohm driver
O
75ohm driver output of pin14 input
VCC22
-
Component Vcc for 75ohm driver
O
75ohm driver output of pin11 input
-
Component Y out for 75ohm driver
-
Y out for 75ohm driver
O
75ohm driver output of pin8 input
-
Chroma out for 75ohm driver
O
DC voltage output for S1,S2
C-OUT
O
75ohm driver output of pin6 input
-
Composite out for 75ohm driver
O
75ohm driver output of pin2 input
VCC21
-
Composite/S Vcc for 75ohm driver
I
2drive/1drive select for composite/S signal
I
Selecting amplifier gain for composite/S signal
29
28
27
26
25
75
DRIVER
75
DRIVER
LPF2
LPF1
2Step
Amp4
LPF1
SYNC
SEP
2Step
PEDESTAL
Amp3
CLAMP
CLAMP
CLAMP
8
9
10
11
12
Function
24
23
22
21
20
19
75
75
DRIVER
DRIVER
LPF2
LPF1
LPF2
LPF1
2Step
2Step
Amp5
Amp6
PEDESTAL
PEDESTAL
VCC
CLAMP
CLAMP
REG
13
14
15
16
17
18
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