參數(shù)資料
型號: ICS843034AYLF
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 時(shí)鐘產(chǎn)生/分配
英文描述: 750 MHz, OTHER CLOCK GENERATOR, PQFP48
封裝: 7 X 7 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, MS-026BBC, LQFP-48
文件頁數(shù): 9/24頁
文件大?。?/td> 726K
代理商: ICS843034AYLF
IDT / ICS 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
17
ICS843034AY REV B JULY 18, 2006
ICS843034
FEMTOCOCKS MULTI-RATE 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
PRELIMINARY
TERMINATION FOR 2.5V LVPECL OUTPUT
Figure 8A and Figure 8B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminating
50
to V
CC
- 2V. For V
CC
= 2.5V, the V
CC
- 2V is very close to ground
level. The R3 in
Figure 8B can be eliminated and the termination
is shown in
Figure 8C.
FIGURE 8C. 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 8B. 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 8A. 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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