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PDF ICS525-02 Data sheet ( Hoja de datos )
| Número de pieza | ICS525-02 | |
| Descripción | (ICS525-01/02) User Configurable Clock | |
| Fabricantes | Integrated Circuit Systems | |
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ICS525-01/02
OSCaR™ User Configurable Clock
Description
The ICS525-01 and ICS525-02 OSCaR™ are
the most flexible way to generate a high quality,
high accuracy, high frequency clock output from
an inexpensive crystal or clock input. The name
OSCaR stands for OSCillator Replacement, as
they are designed to replace crystal oscillators in
almost any electronic system. The user can easily
configure the device to produce nearly any
output frequency from any input frequency by
grounding or floating the select pins. Neither
microcontroller nor software nor device
programmer are needed to set the frequency.
Using Phase-Locked-Loop (PLL) techniques, the
device accepts a standard fundamental mode,
inexpensive crystal to produce output clocks up
to 250 MHz. It can also produce a highly
accurate output clock from a given input clock,
keeping them frequency locked together.
For similar capability with a serial interface, use
the ICS307. For simple multipliers to produce
common frequencies, refer to the LOCO family
of parts, which are smaller and more cost
effective.
Features
• Packaged as 28 pin SSOP (150 mil body)
• ICS525-01 with output frequencies up to 160 MHz
• ICS525-02 with output frequencies up to 250 MHz
• User determines the output frequency by
setting all internal dividers
• Eliminates need for custom oscillators
• No software needed
• Online ICS525 calculator at
www.icst.com/products/ics525inputForm.html
• Pull-ups on all select inputs
• Input crystal frequency of 5 - 27 MHz
• Input clock frequency of 2 - 50 MHz
• Very low jitter
• Duty cycle of 45/55 up to 200 MHz
• Operating voltages of 3.0 to 5.5V
• Ideal for oscillator replacement
• Industrial temperature versions available
• For Zero Delay, refer to the ICS527
Block Diagram
VDD
2
Reference
PD Divider
GND
2
Phase Comparator,
Charge Pump,
and Loop Filter
VCO
S2:S0
3
Output
Divider
Crystal or
clock input
X1/ICLK
X2
Crystal
Oscillator
7
VCO
Divider
9
Output
Buffer
CLK
Output
Buffer
REF
www.DataSohpetieont4aUl .com R6:R0
V8:V0
MDS 525-01/02 I
1
Revision 071100
Printed 11/13/00
Integrated Circuit Systems, Inc. • 525 Race Street •San Jose• CA • 95126•(408) 295-9800tel• www.icst.com
1 page  
www.DataSheet4U.com
ICS525-01/02
OSCaR™ User Configurable Clock
The dividers are expressed as integers, so that if a 66.66 MHz output is desired from a 14.31818 input, the
Reference Divider Word (RDW) should be 59, and the VCO Divider Word (VDW) should be 276, with
an Output divider (OD) of 2. In this example, R6:R0 is 0111011, V8:V0 is 100010100, and S2:S0 is 001.
Since all of these inputs have pull-up resistors, it is only necessary to ground the zero pins, namely V7, V6,
V5, V3, V1, V0, R6, R2, S2, and S1.
To determine the best combination of VCO, reference, and output divider, use the ICS525 Calculator on
our Web site: http://www.icst.com/products/ics525inputForm.html. This online form is easy to use and
quickly shows you up to three options for these settings.
You may also fax this page to MicroClock/ICS at 408 295 9818(fax), or contact us via our website at
www.icst.com. Be sure to indicate the following:
Your Name ________________ Company Name___________________ Telephone_________________
Respond by e-mail (list your e-mail address) __________________or fax number ___________________
Desired input crystal/clock (in MHz) _______________ Desired output frequency________________
VDD = 3.3V or 5V ___________
Duty Cycle: 40-60% _______ or 45-55% required________
www.DataSheet4U.com
MDS 525-01/02 I
5
Revision 071100
Printed 11/13/00
Integrated Circuit Systems, Inc. • 525 Race Street •San Jose• CA • 95126•(408) 295-9800tel• www.icst.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ICS525-02.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ICS525-01 | (ICS525-01/02) User Configurable Clock | Integrated Circuit Systems |
| ICS525-02 | (ICS525-01/02) User Configurable Clock | Integrated Circuit Systems |
| ICS525-03 | PECL Input OSCaR-TM USER Configurable Clock | Integrated Circuit Systems |
| ICS525-04 | OSCaR-TM User Configurable PECL Clock | Integrated Circuit Systems |
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