8S89834AKILF IDT [Integrated Device Technology], 8S89834AKILF Datasheet - Page 11

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8S89834AKILF

Manufacturer Part Number
8S89834AKILF
Description
Low Skew, 2-to-4 LVCMOS/LVTTL-to-LVPECL/ECL Clock Multiplexer
Manufacturer
IDT [Integrated Device Technology]
Datasheet
ICS8S89834I Data Sheet
Termination for 2.5V LVPECL Outputs
Figure 4A and Figure 4B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminating 50Ω
to V
Figure 4A. 2.5V LVPECL Driver Termination Example
Figure 4C. 2.5V LVPECL Driver Termination Example
ICS8S89834AKI REVISION A FEBRUARY 4, 2010
CC
V
V
CC
CC
– 2V. For V
2.5V LVPECL Driver
2.5V LVPECL Driver
= 2.5V
= 2.5V
CC
= 2.5V, the V
50Ω
50Ω
50Ω
50Ω
CC
R1
250
– 2V is very close to ground
2.5V
R2
62.5
R1
50
R3
250
R4
62.5
R2
50
+
+
2.5V
2.5V
11
level. The R3 in Figure 4B can be eliminated and the termination is
shown in Figure 4C.
Figure 4B. 2.5V LVPECL Driver Termination Example
LOW SKEW, 2-TO-4 LVCMOS/LVTTL-TO-LVPECL/ECL CLOCK MULTIPLEXER
V
CC
2.5V LVPECL Driver
= 2.5V
50Ω
50Ω
©2010 Integrated Device Technology, Inc.
R1
50
R2
50
R3
18
+
2.5V

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