參數(shù)資料
型號(hào)： ICS84334AYT
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 時(shí)鐘產(chǎn)生/分配
英文描述： 700 MHz, OTHER CLOCK GENERATOR, PQFP48
封裝： 7 X 7 MM, 1.40 MM HEIGHT, MS-026, LQFP-48
文件頁(yè)數(shù)： 7/21頁(yè)
文件大?。?/td> 335K
代理商： ICS84334AYT
84334BY
www.icst.com/products/hiperclocks.html
REV. A JULY 22, 2004
15
Integrated
Circuit
Systems, Inc.
ICS84334
MULTI-RATE LVPECL FREQUENCY SYNTHESIZER
PRELIMINARY
TERMINATION FOR 2.5V LVPECL OUTPUT
Figure 5A and Figure 5B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminat-
ing 50
to V
CC - 2V. For VCC = 2.5V, the VCC - 2V is very close to
ground level. The R3 in Figure 4B can be eliminated and the
termination is shown in
Figure 4C.
FIGURE 5C. 2.5V LVPECL TERMINATION EXAMPLE
R2
50
Zo = 50 Ohm
VCCO=2.5V
R1
50
Zo = 50 Ohm
+
-
2.5V
2,5V LVPECL
Driv er
FIGURE 5B. 2.5V LVPECL DRIVER TERMINATION EXAMPLE
VCCO=2.5V
R1
50
R2
50
Zo = 50 Ohm
R3
18
2,5V LVPECL
Driv er
Zo = 50 Ohm
+
-
2.5V
FIGURE 5A. 2.5V LVPECL DRIVER TERMINATION EXAMPLE
R2
62.5
2.5V
2,5V LVPECL
Driv er
R3
250
Zo = 50 Ohm
R4
62.5
2.5V
+
-
R1
250
VCCO=2.5V
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