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參數(shù)資料
| 型號： | LM1281 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 運動控制電子 |
| 英文描述： | 85 MHz RGB Video Amplifier System with On Screen Display (OSD) |
| 中文描述： | 85兆赫的RGB視頻放大器系統(tǒng)的屏幕顯示（OSD） |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 391K |
| 代理商： | LM1281 |
Pin Descriptions
Pin No.
1
2
3
Pin Name
Schematic
Description
Red OSD Input
Green OSD Input
Blue OSD Input
These inputs accept standard TTL inputs. Each
color is either fully on (logic high) or fully off
(logic low). Connect unused pins to ground
with a 47k resistor.
4
Video/OSD Switch
This input accepts a standard TTL input.
H = OSD
L = Video
Connect to ground with a 47k resistor when
not using OSD.
5
8
11
Red Video In
Green Video In
Blue Video In
Video inputs. These inputs
must
be AC
Coupled with a minimum of a 1 μF cap, 10 μF
is preferred. DC restoration is done at these
inputs. A series resistor of about 33
should
also be used.
6
9
7
10
21
12
V
CC1
Power supply pins (excluding output stage)
Ground
Ground pins. All grounds are internally
connected and must also be connected on the
PCB.
Pin used for additional filter capacitor to
internal reference. The voltage at this pin is
2.0V.
V
REF
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.
www.national.com
10
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM1281N | 85 MHz RGB Video Amplifier System with On Screen Display (OSD) |
| LM1282 | 110 MHz RGB Video Amplifier System with On Screen Display (OSD) |
| LM1282N | 110 MHz RGB Video Amplifier System with On Screen Display (OSD) |
| LM1283 | 140 MHz RGB Video Amplifier System with On Screen Display (OSD) |
| LM1283N | 140 MHz RGB Video Amplifier System with On Screen Display (OSD) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1281CL WAF | 制造商:Texas Instruments 功能描述: |
| LM1281N | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Panasonic Industrial Company 功能描述:IC |
| LM1282 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:110 MHz RGB Video Amplifier System with On Screen Display (OSD) |
| LM1282BL WAF | 制造商:Texas Instruments 功能描述: |
| LM1282N | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Panasonic Industrial Company 功能描述:IC |
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