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| 型号： | 01AL |
| 英文描述： | 2:1 DIFFERENTIAL-TO-LVPECL MULTIPLEXER |
| 中文描述： | 2:1差分至的LVPECL复用器 |
| 文件页数： | 19/19页 |
| 文件大小： | 301K |
| 代理商： | 01AL |
85301AK
www.icst.com/products/hiperclocks.html
REV. A JANUARY 16, 2006
9
Integrated
Circuit
Systems, Inc.
ICS85301
2:1
DIFFERENTIAL-TO-LVPECL MULTIPLEXER
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 2A to 2F 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 2A. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN
BY AN
OPEN COLLECTOR 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
FIGURE 2F.
HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN
BY A
3.3V LVDS 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
Zo = 50 Ohm
FIGURE 2D. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN
BY A
3.3V LVPECL DRIVER WITH AC COUPLE
3.3V
CML Built-In Pullup
R1
100
PCLK
nPCLK
HiPerClockS
PCLK/nPCLK
Zo = 50 Ohm
R2
50
Zo = 50 Ohm
C1
R1
50
C2
PC L K /n PC LK
R5
100 - 200
Zo = 50 Ohm
R6
100 - 200
PCLK
nPCLK
VBB
3.3V LVPECL
3.3V
LVDS
3.3V
Zo = 50 Ohm
3.3V
PCLK
nPCLK
VBB
R2
1K
C2
R1
1K
R5
100
C1
PC L K/n PC L K
Zo = 50 Ohm
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