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10. IC INFORMATION
• Block Diagram
• IC103 (V7021J: NTSC/PAL DECODER
• Pin Assignment
28
15
[ : : : : : : : : : : ~ : II
14
• Pin Function
• External applied voltage
No.
Symbol
GNDl
SYNC OUT
BF OUT
ACK
TC
TP
ADJ
ALT PLSOUT
Vcc3
APCTC
10
HUE
ADJ
1J
VX.02
Description
GND 1erminal
of
Y
AMP
and SYNC SEP.
Output terminal of COMPOSIT SYNC. (TTL level)
Burst flag output terminal. (TTL level)
Time
constant
terminal of
ACK (automatic color
kiUer).
Burst flag
position adjustment tenninal.
The
burst
nag
po9ition can be
adjusted
to
tp
(BF)
=
5.6
µs
by changing
the
current from
this
terminal.
Power terminal of
Y
AMP and SYNC
SEP.
Line
alternate pulse output
tenninaJ.
During
NTSC
mode
:
L
During
PAL mode
:
Alternately dw1gts
H
to
Land
vice versa at eve,y
lH.
Power
terminal
of
MC,
HUE
and VXO.
APC (color synchronous) time constant and
fO
adjustment terminal.
The
free·run frequency
of VXO can
be
adjusted
by
changing
the DC
voltage on
this
tttminal
to
variable.
HUE adjustment
terminal.
Hue over ±JO•
can
be
adjusted by applying a
voltage
of Oto SV
to this terminal.
For
the PAL mode,
ground this
terminal using
a
capacitor.
Crystal oscillator terminal
1:29
No.
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Symbol
VXOl
GND3
SCOUT
GND2
ROUT
GOUT
BOUT
DLA
IN
DLA BIAS
CHROMA OUT
Vcc2
CHROMA
ADJ
CHROMA
IN
ACC
TC
TC2
VIDEO
IN
TC!
LD-V4300D
Description
Crystal
osci1111tor
tennioal
GND
lennioal
of APC,
HUE
and VXO.
Subearrier output terminal
GND terminal of
the
demodulator and
the Y/C mixer.
R output terminal
G output terminal
B output terminal
DL
amplifier input terminal.
Ground this terminal for the NTSC
mode.
Connect
to tl1e
IHDL OUT
terminal for
the PAL
mode.
NTSCJPAL mode switching
and
DL
amplifier gain adjustment
terminal.
By
cl1an,ing the voltage oo
this terminal,
the mode can be
changed from
NTSC to PAL and
vice
versa,
and the gaio of the
DL
amplifier
in
the PAL mode
CM
be
adjusted.
Vw
:s o.av
NTSC
mode
2.0V
:S
Vie :S
2.8V
•
PAL mode
Variable
range
:
±3d8
or
more
Chroma output tennioal.
Connttt to Vcc2 for
the
NTSC
mode.
Coru:ieet to the lHDL
JN
terminal for the
PAL
mode,
Power terminal of
demodulator
and Y/C
mixer.
Chroma amplifier
gain
adjustment
terminal.
The
pin of the chroma amplifier can
be
adjusted
by
changing the
voltage
on
this terminal.
Vu :Ii
0.8V
Monochrome
mode
(b"ee
run)
2.0V
:Ii
Vn
:Ii
3.0V
Color
mode
Variable
range :
-20 to
OdB or more
Chroma signal input
terminal.
The
standard
input level
is
burst amplification of
143mVp·p.
ACC (automatic color control) time constant
terminal.
Pedestal damp tim
e
constant
terminal
Video signal (luminance and synchronous signals) input
terminal.
The standard input
level
is
0.36Vp·p.
Clainp time constant terminal for SYNC
SEP.
130
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