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參數(shù)資料
| 型號： | UPC1830GT |
| 廠商： | NEC Corp. |
| 英文描述： | FILTER-CONTAINING VIDEO CHROMA, SYNCHRONIZING SIGNAL PROCESSING LSI COMPATIBLE WITH NTSC/PAL SYSTEM |
| 中文描述： | 過濾含視頻色度，同步信號處理LSI兼容NTSC制式/ PAL制 |
| 文件頁數(shù)： | 40/44頁 |
| 文件大?。?/td> | 338K |
| 代理商： | UPC1830GT |
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μ
PC1830
40
8.2
μ
PC1830 Pattern Wiring
(1) GND line
Solid grounding should be applied to three GNDs: synchronous section GND (pin 5), video section GND (pin 15) and
chroma section GND (pin 33). They should not be connected to other digital GNDs except the one point of origin.
Use thick connection (thick through hole) for each GND pin of the IC.
When an emitter follower circuit, amplifier, etc. is connected to the color difference output stage or RGB output stage,
separate the solid ground of the output stage from that of the IC output stage.
(2) Power supply line
The three analog power supplies, synchronous section power supply (pin 7), video section power supply (pin 17) and
chroma section power supply (pin 35) should be independent of each other and unified at the supply source. Ensure
that there is no unnecessary routing.
Separate the digital section power supply from the analog section power supply and connect them only at one point.
(3) Signal line
In order to avoid signal cross talk, ensure that the color difference signal line (pins 12, 13, and 14) and RGB signal
line (pins 23, 24, and 25) are not placed close to or in parallel with the digital signal line or HD (pin 10), VD (pin 11)
and BLK (pin 9) lines, or cross those lines.
(4) Placement of peripheral components of each pin
Place components which are connected with pins 1, 2, 5, 7, 15, 16, 17, 18, 19, 23, 24, 25, 28, 29, 33, 34, and 35 close
to the IC. When the placed components are connected to the power supply line or other lines, route low-impedance
lines and make sure that the thickest possible lines are used for connection with the IC pins.
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