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ICS8521I 数据表(PDF) 9 Page - Integrated Circuit Systems

部件名 ICS8521I
功能描述  LOW SKEW, 1-TO-9 DIFFERENTIAL-TO-HSTL FANOUT BUFFER
PDF  14 Pages
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制造商  ICST [Integrated Circuit Systems]
网页  http://www.icst.com
标志 ICST - Integrated Circuit Systems

ICS8521I 数据表(HTML) 9 Page - Integrated Circuit Systems

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Integrated
Circuit
Systems, Inc.
ICS8521I
LOW SKEW, 1-TO-9
DIFFERENTIAL-TO-HSTL FANOUT BUFFER
8521BYI
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 17, 2005
9
PRELIMINARY
LVPECL CLOCK INPUT INTERFACE
The PCLK /nPCLK accepts LVPECL, CML, SSTL and other
differential signals. Both V
SWING and VOH must meet the VPP
and V
CMR input requirements.
Figures 4A to 4D show inter-
face examples for the HiPerClockS PCLK/nPCLK input driven
by the most common driver types. The input interfaces sug-
gested here are examples only. If the driver is from another
vendor, use their termination recommendation. Please con-
sult with the vendor of the driver component to confirm the
driver termination requirements.
FIGURE 4A. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY A
CML DRIVER
FIGURE 4B. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY AN
SSTL DRIVER
FIGURE 4C. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY A
3.3V LVPECL DRIVER
FIGURE 4D. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY A
3.3V LVDS DRIVER
HiPerClockS
PCLK
nPCLK
PCLK/nPCLK
3.3V
R2
50
R1
50
3.3V
Zo = 50 Ohm
CML
3.3V
Zo = 50 Ohm
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
Zo = 50 Ohm
Input
HiPerClockS
CLK
nCLK
3.3V
R3
125
R2
84
Zo = 50 Ohm
3.3V
R4
125
LVPECL
R1
84
3.3V
FIGURE 4E. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY A
3.3V LVPECL DRIVER WITH AC COUPLE
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
Zo = 50 Ohm
R1
100
3.3V
LVDS_Driv er
Zo = 50 Ohm
Receiv er
CLK
nCLK
3.3V



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