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參數(shù)資料
| 型號(hào)： | GS9078ACNE3 |
| 廠商： | Gennum Corporation |
| 英文描述： | GS9078A HD-LINX-R II Multi-Rate Cable Driver |
| 中文描述： | GS9078A的HD - LINX進(jìn)程- R的第二多速率電纜驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 11/14頁(yè) |
| 文件大小： | 244K |
| 代理商： | GS9078ACNE3 |
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GS9078A Data Sheet
34165 - 4
March 2006
11 of 14
5. Application Information
5.1 PCB Layout
Special attention must be paid to component layout when designing serial digital
interfaces for SDTV.
An FR-4 dielectric can be used, however, controlled impedance transmission lines
are required for PCB traces longer than approximately 1cm. Note the following
PCB artwork features used to optimize performance:
The PCB trace width for SD rate signals is closely matched to SMT
component width to minimize reflections due to changes in trace impedance.
The PCB groundplane is removed under the GS9078A output components to
minimize parasitic capacitance.
The PCB ground plane is removed under the GS9078A R
SET
pin and resistor
to minimize parasitic capacitance.
Input and output BNC connectors are surface mounted in-line to eliminate a
transmission line stub caused by a BNC mounting via high speed traces which
are curved to minimize impedance variations due to change of PCB trace
width.
5.2 Typical Application Circuit
Figure 5-1: Typical Application Circuit
GS9078A
1
2
3
4
12
11
9
SDI
SDI
VEE
RSET
SDO
SDO
VCC
10n
75
5.6n
4u7
BNC
VCC
75
5.6n
10n
75
4u7
49.9
750
10n
49.9
4u7
75
BNC
VCC
4u7
VCC
* TYPICAL VALUE: VARIES WITH LAYOUT
DIFFERENTIAL
DATA INPUT
*
*
NOTE: All resistors in Ohms, capacitors in Farads,
and inductors in Henrys, unless otherwise noted.
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