ICs for TV
AN5195K-C
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
DC (V)
5
Killer, 50 Hz/60 Hz and SECAM det.
output pin:
DC
low-level
0.2 V
V
CC for microcomputer
(5 V)
Output selecting by SW (I2C bus)
•
33 kΩ
Connect 33 kΩ load resistor of
high-level
5 V
•
175 Ω
On
To
5
40 µA
10 kΩ
pin 5 to microcomputer VCC
microcomputer
Floating
resistor
Off
0.47 µF
6
Pin for APC filter:
DC
Filter pin for APC detection circuit approx. 2.5 V
(operates for BGP period)
•
5 V
(VCC3
)
Detection sensitivity becomes large
when external R → large (Tends to
pull-in easily. Tends to be affected
by noise)
•
3.3 V
1 V
0.047 µF
APC
det.
circuit
6
40
2.2 µF
kΩ
SW
R
β curve
7.5 kΩ
2.5 V
BGP
max. 1 mA
fC
270 Ω
VCO
circuit
V6
At SECAM, APC circuit is stopped
by short circuiting 40 kΩ
resistor
•
7
8
Pin 7: Chroma oscillation pin (4.43 MHz):
Pin 8: Chroma oscillation pin (3.58 MHz):
AC
f = fC
Oscillation pin for chroma. Either approx. 0.7 V[p-p]
one of 4.43 MHz or 3.58 MHz is
oscillated
•
DC 2.7 V
7
4.43 MHz
Oscillation frequency changeover is
performed by 08−D7 bit of I2C bus
At 08−D7= 0
•
•
C7
12 pF
IP1
IP2
IP1 and IP2 turn-on and at 4.43 MHz,
oscillation starts
100 µA
DC 2.7V
8
500 µA
3.58 MHz
At 08−D7=1
C8
15 pF
I
N1 and IN2 turn-on and at 3.58
IN2
IN1
500 µA
MHz, oscillation starts
Pattern design of pin and oscillator
element should be as short as possi-
ble.
100 µA100 µA
•
15
PANASONIC [ PANASONIC ]
