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PDF ICS7151 Data sheet ( Hoja de datos )
| Número de pieza | ICS7151 | |
| Descripción | Spread Spectrum Clock Generator | |
| Fabricantes | Integrated Circuit Systems | |
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ICS7151
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
VDD
S1:0 2
ENS
XIN
XOUT
PLL Clock
DataSheet4USy.cnothmesis
and Spread
Spectrum
Circuitry
Clock Buffer/
Crystal
Ocsillator
CKOUT
DataShee
External caps required with crystal for
accurate tuning of the clock
GND
Product Lineup
Product
ICS7151M-10, ICS7151MI-10
ICS7151M-20, ICS7151MI-20
ICS7151M-40, ICS7151MI-40
ICS7151M-50, ICS7151MI-50
Input Frequency Range
16.5 MHz to 33.4 MHz
16.5 MHz to 33.4 MHz
16.5 MHz to 33.4 MHz
16.5 MHz to 33.4 MHz
Multiplier Ratio
X1
X2
X4
X1/2
Output Frequency Range
16.5 MHz to 33.4 MHz
33.3 MHz to 66.7 MHz
66.6 MHz to 133.4 MHz
8.3 MHz to 16.7 MHz
MDS 7151 E
1
Revision 012306
DataSheet4U.com
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
DataSheet4 U .com
1 page  
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ICS7151
Spread Spectrum Clock Generator
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±0.3 V, Ambient Temperature -40 to +85°C
Parameter
Symbol
Conditions
Min.
Typ.
Operating Voltage
VDD
3.0 3.3
Supply Current
IDD No load, at 3.3 V
10
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Input Capacitance
VIH XIN, S0, S1, ENS
VIL XIN, S0, S1, ENS
VOH CKOUT, IOH = -4 mA
VOL CKOUT, IOL = 4 mA
CIN XIN, S0, S1, ENS
CKOUT, 8.3 to 66.7
MHz
VDDx0.8
0.0
2.0
Load Capacitance
CL
CKOUT, 66.7 to 100
MHz
CKOUT, 100 to 133.4
MHz
Input Pull-up Resistor RPU ENS
100 240
Max.
3.6
20
VDD + 0.3
VDDx0.20
0.4
16
15
10
7
400
Units
V
mA
V
V
V
V
pF
pF
pF
pF
kΩ
et4U.com
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±D0a.3taVS,hAemetb4iUen.ctoTmemperature -40 to +85° C
Parameter
Symbol
Conditions
Min. Typ.
Input Crystal Frequency
16.5
Input Clock Frequency
fIN 16.5
CKOUT, Multiply by 1 16.5
(ICS7151-10)
Output Frequency
fOUT
CKOUT, Multiply by 2
(ICS7151-20)
CKOUT, Multiply by 4
(ICS7151-40)
33.3
66.6
CKOUT, 2-frequency
division (ICS7151-50)
8.3
Input Clock Duty Cycle
XIN, 16.5 to 33.4 MHz 40
50
Output Clock Duty Cycle
Output Slew Rate
tDCC
CKOUT, 1.5 V
CKOUT, 0.4 to 2.4 V,
CL = 15 pF
40
0.5
DataShee
Max.
33.4
33.4
33.4
Units
MHz
MHz
MHz
66.7 MHz
133.4 MHz
16.7 MHz
60 %
60 %
3.0 V/ns
MDS 7151 E
5
Revision 012306
DataSheet4U.com
Integrated
Circuit
Systems,
Inc.
●
525
Race
Street,
San
Jose,
CA
95126
●
tel
(408)
297-1201
●
www.icst.com
DataSheet4 U .com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ICS7151.PDF ] | |
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