AN5095K
ICs for TV
s Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
voltage
19
GND:
R, G, B circuit.
DAC, I2C circuit.
20
5.9 V
60 kΩ
60 kΩ
6.9 kΩ
9V
(VCC1)
To contrast
circuit
2.1 V
ACL pin:
DC
If DC voltage of pin 20 is decreased from approx. 3 V
the outside, the contrast is turned down.
Service SW.
Note) Since pin 20 also serves as the service
2.3 V
6.9
7.1 7.1 kΩ
kΩ kΩ
Contrast
control
2.3 V
±1 V 100 µA
20
6.9 kΩ 4.7
µF
100 µA
100 µA
3.5 V
SW when used as ALC, design the set
so as not to allow V20 < 0.9 V.
21
5V
I2C bus data input pin
(VCC3)
100 kΩ
50
µA
100 kΩ
Data
1 kΩ
From
21
microcomputer
1.7 V
ACK
30 kΩ
To logic
circuit
30 kΩ
AC
(pulse)
22
5V
I2C clock input pin
(VCC3)
100 kΩ
50
µA
100 kΩ
Clock 1 kΩ
From
22
microcomputer
1.7 V
30 kΩ
To logic
circuit
30 kΩ
AC
(pulse)
23
VCC3-1 (5 V typ.):
DC
For VIF and SIF circuitr.
5V
20