ICS853S004I Datasheet, PDF (11/20 Pages) Integrated Device Technology – Low Skew, 1-to-4, Differential-to-2.5V, 3.3V LVPECL Fanout Buffer

ICS853S004I Data Sheet
LOW SKEW, 1-TO-4, DIFFERENTIAL-TO-2.5V, 3.3V LVPECL/ECL FANOUT BUFFER
2.5V LVPECL Clock Input Interface
The PCLK /nPCLK accepts LVPECL, LVDS, CML and other
differential signals. Both differential signals must meet the V_PP and
V_CMR input requirements. Figures 4A to 4E show interface examples
for the PCLK/nPCLK input driven by the most common driver types.
The input interfaces suggested here are examples only. If the driver
is from another vendor, use their termination recommendation.
Please consult with the vendor of the driver component to confirm the
driver termination requirements.
2.5V
CML
Zo = 50Ω
Zo = 50Ω
2.5V
R1
R2
50Ω
50Ω
2.5V
PCLK
nPCLK
LVPECL
Input
2.5V
CML Built-In Pullup
Zo = 50Ω
Zo = 50Ω
2.5V
R1
100Ω
PCLK
nPCLK
LVPECL
Input
Figure 4A. PCLK/nPCLK Input Driven by a CML Driver
Figure 4B.PCLK/nPCLK Input Driven by a
Built-In Pullup CML Driver
V_CC = 2.5V
50Ω
50Ω
2.5V LVPECL Driver
2.5V
R1
250Ω
R3
250Ω
2.5V
+
–
R2
62.5Ω
R4
62.5Ω
2.5V
2.5V LVPECL
Zo = 50Ω
Zo = 50Ω
R5
R6
100Ω - 200Ω 100Ω - 200Ω
2.5V
C1
PCLK
C2
VBB
nPCLK
LVPECL
R1
R2
50Ω 50Ω
Input
Figure 4C. PCLK/nPCLK Input Driven by a
2.5V LVPECL Driver
Figure 4D. PCLK/nPCLK Input Driven by a
2.5V LVPECL Driver with AC Couple
2.5V
Zo = 50Ω
LVDS
Zo = 50Ω
R5
100Ω
2.5V
C1
C2
R1
R2
1k
1k
PCLK
VBB
nPCLK
LVPECL
Input
C3
0.1µF
Figure 4E. PCLK/nPCLK Input Driven by a
2.5V LVDS Driver
ICS853S004AKI May 27, 2017
11
©2017 Integrated Device Technology, Inc.