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參數(shù)資料
| 型號： | LM1270N |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Hi-Brite 200 MHz I2C Compatible RGB Image Enhancer with Video Auto Sizing |
| 中文描述： | 高亮度場致200兆赫與I2C兼容的RGB視頻自動上漿圖像增強(qiáng) |
| 文件頁數(shù)： | 6/27頁 |
| 文件大小： | 1302K |
| 代理商： | LM1270N |
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Pin Descriptions
(Continued)
Pin
No.
12
Pin Name
Schematic
Description
H Sync
Logic level horizontal sync signal received from the
video card in the PC or sync stripper circuit.
13
SCL
The I
2
C compatible Clock line. A pull-up resistor of
about 2 k
should be connected between this pin
and V
CC
. A 100
resistor should be connected in
series with the clock line for additional ESD
protection.
14
SDA
The I
2
C compatible data line. A pull-up resistor of
about 2 k
should be connected between this pin
and V
CC
. A 100
resistor should be connected in
series with the data line for additional ESD
protection.
15
Blank/Interrupt
Out
This output pin can be selected for Vertical Blank,
blank all the video, or no blanking. Provides the
blanking signal normally used at G1 of the CRT,
blanking the video during vertical retrace. If blanking
is not required, this pin may be used as an interrupt
signal for the microcontroller.
16
H Flyback
Proper operation requires current reversal. R
H
should be large enough to limit the peak current at
pin 16 to about +2 mA during blanking, and
300 μA during scan. C
17
is usually needed for logic
level inputs and should be large enough to make
the time constant, R
H
C
17
significantly larger than the
horizontal period. R
Fil
and C
Fil
are typically 300
and 330 pF when the flyback waveform has ringing
and needs filtering. These two parts are not used on
the current neck board. C
57
may be needed to filter
extraneous noise and can be up to 100 pF.
L
www.national.com
6
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PDF描述 |
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| LM1270NA | Hi-Brite 200 MHz I2C Compatible RGB Image Enhancer with Video Auto Sizing |
| LM1279 | 110 MHz RGB Video Amplifier System with OSD |
| LM1279N | 110 MHz RGB Video Amplifier System with OSD |
| LM1281 | 85 MHz RGB Video Amplifier System with On Screen Display (OSD) |
| LM1281N | 85 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 |
|---|---|
| LM1270NA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Hi-Brite 200 MHz I2C Compatible RGB Image Enhancer with Video Auto Sizing |
| LM1276 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM1276AAA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM1279 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:110 MHz RGB Video Amplifier System with OSD |
| LM12791DL WAF | 制造商:Texas Instruments 功能描述: |
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