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LM1283N データシート(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM1283N
部品情報  140 MHz RGB Video Amplifier System with On Screen Display (OSD)
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM1283N データシート(HTML) 10 Page - National Semiconductor (TI)

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Pin Descriptions (Continued)
Pin No.
Pin Name
Schematic
Description
5
8
11
Red Video In
Green Video In
Blue Video In
Video inputs. These inputs must be AC
Coupled with a minimum ofa1µF cap, 10 µF
is preferred. DC restoration is done at these
inputs. A series resistor of about 33
Ω should
also be used.
6
9
V
CC1
Power supply pins (excluding output stage)
7
10
21
Ground
Ground pins. All grounds are internally
connected and must also be connected on the
PCB.
12
V
REF
Pin used for additional filter capacitor to
internal reference. The voltage at this pin is
2.0V.
13
14
26
27
28
Video Contrast
OSD Constrast
Blue Drive
Green Drive
Red Drive
Contrast control pins:
4V — no attenuation
0V — over 60 dB attenuation
Drive control pins:
4V — no attenuation
0V — 12 dB attenuation
15
16
Clamp Gate
Blank Gate
Both pins accept TTL inputs and are active
low. The clamp gate provides DC restoration of
the video signal. The blank gate forces the
video outputs to below 200 mV.
17
19
24
Blue Clamp Cap
Green Clamp Cap
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.
18
20
23
Blue Video Out
Green Video Out
Red Video Out
Video output. For proper black level the output
must drive 390
Ω impedance.
22
V
CC2
Power supply pin for the output stage. There
are no internal connections to V
CC1
www.national.com
10


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