參數(shù)資料
型號(hào): LM1279A
文件頁(yè)數(shù): 6/13頁(yè)
文件大?。?/td> 511K
代理商: LM1279A
Pin Descriptions
Pin
No.
1
Pin
Name
Schematic
Description
Red OSD Input
These are standard TTL inputs. An OSD
signal at any of the three pins will
automatically switch the pre-amp into the
OSD mode. 7 colors, including white, are
available.
19
Blue OSD Input
20
Green OSD Input
2
3
V
CC1
Red Video In
Power supply pin (excluding output stage)
Video inputs. These inputs must be AC
Coupled with a minimum of a 1 μF cap, 10
μF is preferred. A series resistor of about
33
must be used for ESD protection.
5
Green Video In
8
Blue Video In
4
Red Clamp Cap
The external clamp cap is charged and
discharged to the correction voltage
needed for DC restoration. 0.1 μF is the
recommended value.
7
Green Clamp Cap
9
Blue Clamp Cap
6
Ground
Contrast
Ground pin.
Contrast control pin:
4V - no attenuation
0V - over 40 dB attenuation
Drive control pins:
4V - no attenuation
0V - 20 dB attenuation
10
12
Blue Drive
14
Green Drive
17
Red Drive
11
Clamp Pulse
The clamp pulse activates the DC
restoration circuitry. A 3.6V input is
required to activate the clamp pulse.
13
Blue Video Out
Video output. For proper black level the
output must drive 390
impedance.
15
Green Video Out
18
Red Video Out
L
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