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參數(shù)資料
| 型號： | LMH1251MTX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | YPBPR to RGB Decoder and 2:1 Video Switch |
| 中文描述： | 2-CHANNEL, AUDIO/VIDEO SWITCH, PDSO24 |
| 封裝： | TSSOP-24 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 614K |
| 代理商： | LMH1251MTX |
Application Notes
(Continued)
LAYOUT CONSIDERATIONS
The most important point to note regarding the layout of the
LMH1251 on a PCB is that the trace length between the
output pins of the LMH1251 and the input AC coupling
capacitors of the next stage ADC or preamplifier must be as
minimal as possible. The trace lengths of the H Sync and V
Sync outputs should also be minimized, as the capacitive
loading on these outputs must not exceed 6 pF. For long
signal paths leading up to the input of the LMH1251, con-
trolled impedance lines should be used, along with imped-
ance matching elements. Bypass capacitors should be
placed as close as possible to the supply pins of the device.
The larger electrolytic bypass capacitor can be located far-
ther from the device. The 10K external resistor should also
be placed as close as possible to the R
EXT
pin.
20151908
FIGURE 1. Typical LMH1251 Application
20151907
FIGURE 2. Simplified Application Diagram for Driving a VGA Cable
L
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| LMH1251MTX/NOPB | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| LMH1297EVM | 功能描述:LMH1297 12G BIDIRECTIONAL I/O EV 制造商:texas instruments 系列:* 零件狀態(tài):在售 標準包裝:1 |
| LMH1980 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Auto-Detecting SD/HD/PC Video Sync Separator |
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| LMH1980MM/NOPB | 功能描述:視頻 IC AUTO-DETECT SD/HD/PC VIDEO SYNC SEPARATOR RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
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