525-01R(2000) データシートの表示（PDF） - Integrated Circuit Systems
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525-01R Datasheet PDF : 8 Pages
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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
Crystal
Oscillator
X2
7
VCO
Divider
9
Output
Buffer
CLK
Output
Buffer
REF
optional
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
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