ICs for TV
AN5195K-C
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
De-empahsis pin
DC (V)
9 V
29
AC
0 kHz
to
(VCC1
)
De-empahsis filter pin for sound
detection signal.
•
1.7 kΩ
Detection output
120 kΩ
60 kΩ
External C is the same for PAL and
NTSC (internal impedance changes)
PAL: 120 kΩ//60 kΩ × 1 200 pF = 48 µs
NTSC: 60 kΩ × 1 200 pF = 72 µs
20 kHz
•
PAL
100 µA
29
NTSC
•
•
1 200 pF
9 V
(VCC1
30
AFT output pin
DC
)
1.1 kΩ
1.1 kΩ
Center voltage offset should be
adjusted by using bus.
•
9 V
If AFT defeat SW is turned on (09 =
00), V30 comes to a value determined
by the value of externally attached
resistor dividing.
•
30
To tuner
1.1 kΩ
50 µA
40 kΩ 1.1 kΩ
max. 350 µΑ
AFT µ is variable by impedance of
externally attached resistor.
•
9 V
(VCC1
31
External video input pin
AC
)
Input pin for external video signal.
DC cut input.
1 V[p-p]
(composite)
•
3.4 V
Ext. video
Typical 1 V[p-p]
30 kΩ
•
To
video SW
50 kΩ
31
10 µF
DC
100 µA
10 kΩ
approx. 2.0 V
9 V
32
Decoupling pin
DC
(VCC1
)
•
S curve inside IC is wide band but
DC feedback is applied so that DC
voltage of output signal becomes
constant.
1.7 kΩ
typ. 4.5 V
32
1.7 kΩ
•
DC level (typ. 4.5 V)
10 µF
3 kΩ
3 kΩ
fS → high: V32 → low
20 kΩ
13 µA
100 µA
33
SIF signal input pin
AC+DC
AC
9 V
(VCC1
)
•
Common use with DC input pin for
sharpness control
33
f = fS
SIF in
4.4 V
•
DC bias is applied from external
10 pF
30 kΩ
(DC: 5 V to 7 V for sharpness control)
30 kΩ
1.8
kΩ
200 µA
9 V
5 V to 7 V
100 µA
100 µA
To SIF
limiter
amp.
Sharpness
contorol
19
PANASONIC [ PANASONIC ]
