參數(shù)資料
型號: 843004AGI-01T
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 時鐘產(chǎn)生/分配
英文描述: 170 MHz, OTHER CLOCK GENERATOR, PDSO24
封裝: 4.40 X 7.80 MM, 0.925 MM HEIGHT, MO-153, TSSOP-24
文件頁數(shù): 4/19頁
文件大?。?/td> 1414K
代理商: 843004AGI-01T
ICS843004AGI-01 REVISION B MARCH 24, 2011
12
2011Integrated Device Technology, Inc.
ICS843004I-01 Data Sheet
FEMTOCLOCK CRYSTAL-TO-3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
Termination for 2.5V LVPECL Outputs
Figure 5A and Figure 5B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminating 50
to VCC – 2V. For VCC= 2.5V, the VCC– 2V is very close to ground level.
The R3 in Figure 5B can be eliminated and the termination is shown
in Figure 5C.
Figure 5A. 2.5V LVPECL Driver Termination Example
Figure 5C. 2.5V LVPECL Driver Termination Example
Figure 5B. 2.5V LVPECL Driver Termination Example
2.5V LVPECL Driver
VCC = 2.5V
2.5V
50
50
R1
250
R3
250
R2
62.5
R4
62.5
+
2.5V LVPECL Driver
VCC = 2.5V
2.5V
50
50
R1
50
R2
50
+
2.5V LVPECL Driver
VCC = 2.5V
2.5V
50
50
R1
50
R2
50
R3
18
+
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