ics8430ay62l Integrated Device Technology, ics8430ay62l Datasheet - Page 14

• Manufacturer Part Number: ics8430ay62l
• Description: Ics8430-62 500mhz, Crystal-to-3.3v, 2.5v Differential Lvpecl Frequency Synthesizer
• Manufacturer: Integrated Device Technology

ICS8430-62 Datasheet
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
ICS8430AY-62 REVISION A JULY 2, 2009
CC
V
V
CC
CC
– 2V. For V
2.5V LVPECL Driver
2.5V LVPECL Driver
= 2.5V
= 2.5V
CCO
= 2.5V, the V
50Ω
50Ω
50Ω
50Ω
CCO
R1
250
2.5V
R2
62.5
R1
50
– 2V is very close to ground
R3
250
R4
62.5
R2
50
+
+
–
–
2.5V
2.5V
14
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
500MHz CRYSTAL-TO-3.3V, 2.5V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
V
CC
2.5V LVPECL Driver
= 2.5V
50Ω
50Ω
©2009 Integrated Device Technology, Inc.
R1
50
R2
50
R3
18
+
–
2.5V