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ICS853017 View Datasheet(PDF) - Integrated Device Technology

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ICS853017 Datasheet PDF : 15 Pages
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ICS853017
QUAD, 1-TO-1, DIFFERENTIAL-TO-2.5V, 3.3V, 5V LVPECL/ECL RECEIVER
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 terminating
50Ω to V - 2V. For V = 2.5V, the V - 2V is very close to ground
CC
CC
CC
level. The R3 in Figure 5B can be eliminated and the termination
is shown in Figure 5C.
VCC=2.5V
Zo = 50 Ohm
Zo = 50 Ohm
2,5V LVPECL
Driv er
2.5V
R1
R3
250
250
2.5V
+
-
R2
62.5
R4
62.5
VCC=2.5V
Zo = 50 Ohm
Zo = 50 Ohm
2,5V LVPECL
Driv er
2.5V
+
-
R1
R2
50
50
R3
18
FIGURE 5A. 2.5V LVPECL DRIVER TERMINATION EXAMPLE
FIGURE 5B. 2.5V LVPECL DRIVER TERMINATION EXAMPLE
VCC=2.5V
Zo = 50 Ohm
Zo = 50 Ohm
2,5V LVPECL
Driv er
2.5V
+
-
R1
R2
50
50
FIGURE 5C. 2.5V LVPECL TERMINATION EXAMPLE
IDT/ ICS2.5V, 3.3V, 5V LVPECL/ECL RECEIVER
10
ICS853017AM REV. B OCTOBER 24, 2007
 

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