8SLVP2104 Datasheet, PDF (16/23 Pages) Integrated Device Technology – Maximum input clock frequency

8SLVP2104 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 50
to V_CC – 2V. For V_CC = 2.5V, the V_CC – 2V is very close to ground
level. The R3 in Figure 6B can be eliminated and the termination is
shown in Figure 6C.
VCC = 2.5V
50Ω
50Ω
2.5V LVPECL Driver
2.5V
R1
250Ω
R3
250Ω
2.5V
+
–
R2
62.5Ω
R4
62.5Ω
V_CC = 2.5V
50Ω
50Ω
2.5V LVPECL Driver
2.5V
+
–
R1
R2
50Ω
50Ω
R3
18Ω
Figure 6A. 2.5V LVPECL Driver Termination Example
Figure 6B. 2.5V LVPECL Driver Termination Example
VCC = 2.5V
50Ω
50Ω
2.5V LVPECL Driver
2.5V
+
–
R1
R2
50Ω
50Ω
Figure 6C. 2.5V LVPECL Driver Termination Example
LOW PHASE NOISE, DUAL 1-TO-4, 3.3V, 2.5V LVPECL OUTPUT
16
FANOUT BUFFER
REVISION C 6/8/15