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ICS853S12 Datasheet(PDF) 8 Page - Renesas Technology Corp

Part # ICS853S12
Description  LOW SKEW, 1-TO-12, DIFFERENTIAL-TO- 3.3V, 2.5V LVPECL FANOUT BUFFER
PDF  18 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

ICS853S12 Datasheet(HTML) 8 Page - Renesas Technology Corp

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IDT™ / ICS™ LVPECL FANOUT BUFFER
8
ICS853S12AKI REV. A MAY 21, 2008
ICS853S12I
LOW SKEW, 1-TO-12, DIFFERENTIAL-TO-3.3V, 2.5V LVPECL FANOUT BUFFER
LVPECL CLOCK INPUT INTERFACE
The PCLK /nPCLK accepts LVPECL, CML, SSTL and other
differential signals. Both V
SWING and VOH must
meet the V
PP
and
V
CMR
input requirements.
Figures 2A to 2E show interface
examples for the HiPerClockS PCLK/nPCLK input driven by
the most common driver types. The input interfaces suggest-
ed 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 termin-
ation requirements.
FIGURE 2A. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN
BY A CML DRIVER
FIGURE 2B. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN
BY A BUILT-IN PULLUP CML DRIVER
FIGURE 2C. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN
BY A 3.3V LVPECL DRIVER
PCLK/nPCLK
2.5V
Zo = 60 Ohm
SSTL
HiPerClockS
PCLK
nPCLK
R2
120
3.3V
R3
120
Zo = 60 Ohm
R1
120
R4
120
2.5V
FIGURE 2E. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN
BY AN SSTL DRIVER
HiPerClockS
PCLK
nPCLK
PCLK/nPCLK
3.3V
R2
50
R1
50
3.3V
Zo = 50 Ohm
CML
3.3V
Zo = 50 Ohm
3.3V
HiPerClockS
PCLK
nPCLK
R2
84
R3
125
Input
Zo = 50 Ohm
R4
125
R1
84
LVPECL
3.3V
3.3V
Zo = 50 Ohm
3.3V
R5
100 - 200
3.3V
3.3V
HiPerClockS
PCLK
nPCLK
R1
125
PCLK/nPCLK
R2
125
R3
84
C1
C2
Zo = 50 Ohm
R4
84
Zo = 50 Ohm
R6
100 - 200
3.3V LVPECL
FIGURE 2D. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN
BY A 3.3V LVPECL DRIVER WITH AC COUPLE
3.3V
3.3V
CML Built-In Pullup
R1
100
PCLK
nPCLK
HiPerClockS
PCLK/nPCLK
Zo = 50 Ohm
Zo = 50 Ohm



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