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Número de pieza ICS511MILFT
Descripción LOCO PLL CLOCK MULTIPLIER
Fabricantes Integrated Circuit Systems 
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ICS511
LOCOTM PLL CLOCK MULTIPLIER
Description
The ICS511 LOCOTM is the most cost effective way to
generate a high quality, high frequency clock output
from a lower frequency crystal or clock input. The name
LOCO stands for Low Cost Oscillator, as it is designed
to replace crystal oscillators in most electronic
systems. Using Phase-Locked Loop (PLL) techniques,
the device uses a standard fundamental mode,
inexpensive crystal to produce output clocks up to 200
MHz.
Stored in the chip’s ROM is the ability to generate nine
different multiplication factors, allowing one chip to
output many common frequencies (see table on page
2).
The device also has an output enable pin which
tri-states the clock output when the OE pin is taken low.
This product is intended for clock generation. It has low
output jitter (variation in the output period), but input to
output skew and jitter are not defined nor guaranteed.
For applications which require defined input to output
skew, use the ICS570B.
Features
Packaged as 8-pin SOIC or die
Available in Pb (lead) free package
Upgrade of popular ICS501 with:
- changed multiplier table
- faster operating frequencies
- output duty cycle at VDD/2
Zero ppm multiplication error
Input crystal frequency of 5 - 27 MHz
Input clock frequency of 2 - 50 MHz
Output clock frequencies up to 200 MHz
Extremely low jitter of 25 ps (one sigma)
Compatible with all popular CPUs
Duty cycle of 45/55 up to 200 MHz
Mask option for nine selectable frequencies
Operating voltage of 3.3 V or 5 V
Tri-state output for board level testing
Industrial temperature version available
Advanced, low power CMOS process
Block Diagram
S1:0 2
Crystal or
Clock input
X1/ICLK
X2
Crystal
O s c illa to r
Optional crystal capacitors
VDD
PLL Clock
M u ltip lie r
Circuitry
and ROM
GND
OE
CLK
MDS 511 G
1
Revision 102504
Integrated Circuit Systems 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com

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ICS511MILFT pdf
ICS511
LOCOTM PLL Clock Multiplier
DC Electrical Characteristics
VDD=5.0 V ±5% , Ambient temperature -40 to +85°C, unless stated otherwise
Parameter
Symbol Conditions
Min. Typ.
Operating Voltage
VDD
4.75
Input High Voltage, ICLK only
Input Low Voltage, ICLK only
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
IDD Operating Supply Current,
20 MHz crystal
VIH ICLK (pin 1)
(VDD/2)+1
VIL ICLK (pin 1)
VIH OE (pin 7)
2.0
VIL OE (pin 7)
VIH S0, S1
VDD-0.5
VIL S0, S1
VOH IOH = -25 mA
2.4
VOL IOL = 25 mA
No load, 100M
9
Short Circuit Current
CLK output
+70
On-Chip Pull-up Resistor
Pin 7
270
Input Capacitance, S1, S0, and OE
Pins 4, 6, 7
4
Nominal Output Impedance
20
Max. Units
5.25 V
V
(VDD/2)-1 V
V
0.8 V
V
0.5 V
V
0.4 V
mA
mA
k
pF
AC Electrical Characteristics
VDD = 5.0 V ±5%, Ambient Temperature -40 to +85° C, unless stated otherwise
Parameter
Symbol
Conditions
Min. Typ.
Input Frequency, crystal input
Input Frequency, clock input
Output Frequency
FIN
FIN
FOUT
0°C to +70°C
-40°C to +85°C
5
2
14
14
Output Clock Rise Time
Output Clock Fall Time
Output Clock Duty Cycle
PLL Bandwidth
tOR 0.8 to 2.0 V, Note 1
tOF 2.0 to 8.0 V, Note 1
tOD 1.5 V, up to 160 MHz
1
1
45 49-51
10
Output Enable Time, OE high to
output on
50
Output Disable Time, OE low to
tri-state
50
Absolute Clock Period Jitter
One Sigma Clock Period Jitter
tja Deviation from mean
tjs
+70
25
Note 1: Measured with 15 pF load.
Max.
27
50
200
160
55
Units
MHz
MHz
MHz
MHz
ns
ns
%
kHz
ns
ns
ps
ps
MDS 511 G
5
Revision 102504
Integrated Circuit Systems 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com

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