85314AGI-11 Integrated Device Technology (Idt), 85314AGI-11 Datasheet - Page 12
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85314AGI-11
Manufacturer Part Number
85314AGI-11
Description
Clock Driver 2-IN LVPECL 20-Pin TSSOP Tube
Manufacturer
Integrated Device Technology (Idt)
Datasheet
1.85314AGI-11.pdf
(19 pages)
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