ICs for TV
AN5195K-C
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
DC (V)
18
Horizontal sync. detection pin:
DC
To
chroma
circuit
Phase of horizontal synchronizing at synchronous
signal and horizontal output pulse is approx. 6 V
•
6.3 V
(VCC2
5 V
(VCC3
)
)
detected and outputted.
at asynchronous
approx. 0.3 V
10 kΩ
Pin 18 is low at out of phase.
In asynchronous state, color control
becomes min. and chroma output
disappears.
•
•
2.8 V
800 µA
800 µA
12 kΩ
12 kΩ
I1
I2
Pay attention to impedance when
voltage of pin18 is used by micro-
computer (ZO ≥ 500 kΩ is required)
•
50 µA
Pin 56
H-out
18
ZO
Pin 46
HV sync. in
0.022 µF
10 kΩ
1 MΩ
HVSYNC period
•
When pin 56 is high: I1 on
When pin 56 is low: I2 on
19
20
GND:
RGB circuit
DAC I2C circuit
•
•
ACL pin:
DC
9 V
(VCC1
)
Contrast can be reduced when DC
voltage of pin 20 is decreased from
the outside.
approx. 3 V
•
5.9 V
To contrast
circuit
60 kΩ
60 kΩ
6.9 kΩ
2.1 V
Service SW
•
6.9
Note) When pin 20 is used as ACL, set
design must be done not to become
V20 < 0.9 V so that pin 20 operates
also as the service SW.
3.5 V
2.3 V
kΩ
7.1 kΩ
7.1 kΩ
6.9 kΩ
Contrast
control
20
4.7 µF
2.3 V
100 µA
±1 V
100 µA
100 µA
21
I2C bus data input pin:
AC
5 V
(pulse)
(VCC3
)
100 kΩ
1 kΩ
50 µA 100 kΩ
Data
21
microcomputer
1.7 V
From
To logic
circuit
ACK
30 kΩ
30 kΩ
17
PANASONIC [ PANASONIC ]
