853S9252BKILF IDT, 853S9252BKILF Datasheet - Page 12

• Manufacturer Part Number: 853S9252BKILF
• Description: Clock Drivers & Distribution
• Manufacturer: IDT

Specifications of 853S9252BKILF

• Product Category: Clock Drivers & Distribution
• Rohs: yes
• Part # Aliases: ICS853S9252BKILF

ICS853S9252I Data Sheet
Termination for 2.5V LVPECL Outputs
Figure 6A and Figure 6B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminating 50Ω
to V
Figure 6A. 2.5V LVPECL Driver Termination Example
Figure 6C. 2.5V LVPECL Driver Termination Example
ICS853S9252BKI REVISION A JULY 29, 2011
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
250Ω
– 2V is very close to ground
2.5V
R2
62.5Ω
R1
50Ω
R3
250Ω
R4
62.5Ω
R2
50Ω
+
+
–
–
2.5V
2.5V
12
level. The R3 in Figure 6B can be eliminated and the termination is
shown in Figure 6C.
Figure 6B. 2.5V LVPECL Driver Termination Example
V
CC
2.5V LVPECL Driver
= 2.5V
2.5V, 3.3V ECL/LVPECL CLOCK/DATA FANOUT BUFFER
50Ω
50Ω
©2011 Integrated Device Technology, Inc.
R1
50Ω
R2
50Ω
R3
18Ω
+
–
2.5V