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PDF ICS7151A-50 Data sheet ( Hoja de datos )
| Número de pieza | ICS7151A-50 | |
| Descripción | Spread Spectrum Clock Generator | |
| Fabricantes | Integrated Circuit Systems | |
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ICS7151A-50
Spread Spectrum Clock Generator
Description
The ICS7151A-50 is a clock generator for EMI
(Electromagnetic Interference) reduction. Spectral
peaks are attenuated by modulating the system clock
frequency. Down or center spread profiles are
selectable. Down spread will not exceed the maximum
frequency of an unspread clock, and center spread
does not change the average operating frequency of
the system
ICS offers many other clocks for computers and
computer peripherals. Consult ICS when you need to
remove crystals and oscillators from your board.
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
• Provides a spread spectrum clock output (±0.5%,
±1.5% center spread; -1.0%, -3.0% down spread)
• Multiplication rate of x1/2
• Advanced, low-power CMOS process
• Pin compatible with the Fujitsu MB88151-500
Block Diagram
VDD
S1:0 2
ENS
XIN
XOUT
DataSheet4UPSLy.cLnotChmeloscisk
and Spread
Spectrum
Circuitry
Clock Buffer/
Crystal
Ocsillator
External caps required with crystal for
accurate tuning of the clock
GND
CKOUT
DataShee
MDS 7151A-50 A
1
Revision 102005
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  
www.DataSheet4U.com
ICS7151A-50
Spread Spectrum Clock Generator
DC Electrical Characteristics
et4U.com
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,
output = 24 MHz
10
Input Frequency
16.5
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
VDD * 0.8
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
14
33.4
VDD + 0.3
VDD * 0.20
0.4
16
15
10
7
400
Units
V
mA
MHz
V
V
V
V
pF
pF
pF
pF
kΩ
AC Electrical Characteristics DataSheet4U.com
Unless stated otherwise, VDD = 3.3 V ±0.3 V, Ambient Temperature -40 to +85° C
Parameter
Symbol
Conditions
Min. Typ.
Oscillation Frequency
fX Fundamental
oscillation
16.5
Input Frequency
Output Frequency
fIN
fOUT
XIN
CKOUT, 2-frequency
division
16.5
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,
load capacitance 15 pF
40
0.5
TBD
Cycle to Cycle Jitter
tJC
No load, standard
deviation
TBD
Lock Time
Modulation Frequency
tLK
fMOD
CKOUT
CKOUT=TBD
2
33
Max. Units
33.4 MHz
33.4 MHz
16.7 MHz
60 %
60 %
3.0 V/ns
200 ps
5 ms
kHz
DataShee
MDS 7151A-50 A
5
Revision 102005
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 ICS7151A-50.PDF ] | |
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