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參數(shù)資料
| 型號： | 43A75 |
| 英文描述： | 75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| 中文描述： | 片75MHZ，的LVCMOS，LVPECL的雙輸出振蕩器 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大小： | 193K |
| 代理商： | 43A75 |
843AG-75
www.icst.com/products/hiperclocks.html
REV. A JANUARY 9, 2006
6
Integrated
Circuit
Systems, Inc.
ICS843-75
75MH
Z
, LVCMOS, LVPECL
D
UAL
O
UTPUT
O
SCILLATOR
A
PPLICATION
I
NFORMATION
Figure 1. C
RYSTAL
I
NPU
t I
NTERFACE
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS843-75 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 1
below were determined using a 25MHz, 18pF parallel
resonant crystal and were chosen to minimize the ppm error.
The optimum C1 and C2 values can be slightly adjusted for
different board layouts.
LVCMOS O
UTPUT
:
An unused LVCMOS output should be terminated with 100
Ω
to ground as close as possible to the device.
LVPECL O
UTPUT
All unused LVPECL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
R
ECOMMENDATIONS
FOR
U
NUSED
O
UTPUT
P
INS
X1
18pF Parallel Crystal
C1
12p
XTAL_OUT
XTAL_IN
C2
12p
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