85314AGI-11 Integrated Device Technology (Idt), 85314AGI-11 Datasheet - Page 12

• Manufacturer Part Number: 85314AGI-11
• Description: Clock Driver 2-IN LVPECL 20-Pin TSSOP Tube
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 85314AGI-11

• Package: 20TSSOP
• Configuration: 1 x 2:1
• Input Signal Type: HCSL|LVDS|LVHSTL|LVPECL|SSTL
• Maximum Output Frequency: 700 MHz
• Operating Supply Voltage: 3.3 V

ICS85314I-11 Data Sheet
ICS85314AGI-11 REVISION E MAY 4, 2010
Termination for 2.5V LVPECL Outputs
Figure 5A and Figure 5B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminating
50Ω to V
Figure 5A. 2.5V LVPECL Driver Termination Example
Figure 5C. 2.5V LVPECL Driver Termination Example
V
V
CC
CC
2.5V LVPECL Driver
2.5V LVPECL Driver
= 2.5V
= 2.5V
CC
– 2V. For V
CC
50Ω
50Ω
50Ω
50Ω
= 2.5V, the V
R1
250Ω
2.5V
R2
62.5Ω
R1
50Ω
CC
– 2V is very close to
R3
250Ω
R4
62.5Ω
R2
50Ω
+
–
+
–
2.5V
2.5V
12
ground level. The R3 in Figure 5B can be eliminated and the
termination is shown in Figure 5C.
Figure 5B. 2.5V LVPECL Driver Termination Example
LOW SKEW, 1-TO-5 DIFFERENTIAL-TO-2.5V, 3.3V LVPECL FANOUT BUFFER
V
CC
2.5V LVPECL Driver
= 2.5V
50Ω
50Ω
©2010 Integrated Device Technology, Inc.
R1
50Ω
R2
50Ω
R3
18Ω
+
–
2.5V