AN5195K-C
ICs for TV
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
DC (V)
9 V
34
External audio input pin:
AC
0 kHz
to
(VCC1
)
5.4 V
Input pin for external audio signal
input. DC cut input.
•
50 µA
To
audio SW
Typical input level should be adjusted
to internal sound level.
20 kHz
•
65 kΩ
34
10 µF
150 µA
9 V
35
SIF signal input pin:
AC+DC
(VCC1
)
100 µA
•
36
Input pin of SIF1, SIF2 and is biased
in inside.
AC
f = fS
DC
40 kΩ
SIF in
3.7 V
30 kΩ
30 kΩ
3.0 V
1.8
kΩ
Pins 35
36
200 µA
9 V
100 µA
To SIF
limiter
amp.
37
IF AGC filter pin:
DC
5 V
(VCC3
)
Pin for IF AGC filter. The current
obtained from peak AGC circuit is
smoothed by external capacitor.
Since response becomes faster
when C → small but sag tends to
appear easily.
approx. 2 V
•
•
To
IF amp.
37
30 µA
0.47 µF
38
40
Internal video input pin:
AC
9 V
(VCC1
)
•
Input pin for the signal detected in
1 V[p-p]
3.0 V
50 µA
the VIF circuit (internal video signal) (composite)
Input with DC cut
Int. video
Pins 38
•
•
30 kΩ
To
video SW
40
Typical input: 1 V[p-p]
10 µF
680 kΩ
DC level
approx. 1.6 V
39
9 V
SIF APC filter pin:
Filter pin of SIF APC circuit
DC
(VCC1
)
•
VCO
(4 MHz
to 7 MHz)
P.C.
8.4 kΩ
7.5 kΩ
To
audio SW
800 µA
13 kΩ
2 pF
39
5.6
kΩ
1 000 pF
72 µA
200 µA
20
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