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參數資料
| 型號： | 51MI50LF |
| 英文描述： | Spread Spectrum Clock Generator |
| 中文描述： | 擴頻時鐘發生器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 113K |
| 代理商： | 51MI50LF |
ICS7151
MDS 7151 E
1
Revision 012306
Integrated Circuit Systems, Inc.
●
525 Race Street, San Jose, CA 95126
●
tel (408) 297-1201
●
www.icst.com
Spread Spectrum Clock Generator
Description
The ICS7151-10, -20, -40, and -50 are clock
generators for EMI (Electro Magnetic Interference)
reduction (see below for frequency ranges and
multiplier ratios). Spectral peaks can be attenuated by
slightly modulating the oscillation frequency. Both down
and center spread profiles are selectable. Down spread
maintains an average frequency less than an unspread
clock, and will not exceed the maximum frequency of
an unspread clock.
Features
Operating voltage of 3.3 V ±0.3 V
Packaged in 8-pin SOIC
Available in Pb (lead) free package
Input frequency range of 16.5 to 33.4 MHz
Output frequency ranges of 8.3 to 16.7 MHz, 16.5 to
33.4 MHz, 33.3 to 66.7 MHz, 66.6 to 133.4 MHz
Provides a spread spectrum clock output (±0.5%,
±1.5% center spread; -1.0%, -3.0% down spread)
Multiplication rates of x1/2, x1, x2, and x4
Advanced, low-power CMOS process
Block Diagram
Product Lineup
Product
Input Frequency Range
Multiplier Ratio
Output Frequency Range
ICS7151M-10, ICS7151MI-10
16.5 MHz to 33.4 MHz
X1
16.5 MHz to 33.4 MHz
ICS7151M-20, ICS7151MI-20
16.5 MHz to 33.4 MHz
X2
33.3 MHz to 66.7 MHz
ICS7151M-40, ICS7151MI-40
16.5 MHz to 33.4 MHz
X4
66.6 MHz to 133.4 MHz
ICS7151M-50, ICS7151MI-50
16.5 MHz to 33.4 MHz
X1/2
8.3 MHz to 16.7 MHz
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
S1:0
ENS
CKOUT
2
GND
VDD
Clock Buffer/
Crystal
Ocsillator
XIN
XOUT
External caps required with crystal for
accurate tuning of the clock
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