ICS525R-04 View Datasheet(PDF) - Integrated Circuit Systems
Part Name
Description
MFG CO.
'ICS525R-04' PDF : 7 Pages View PDF
ICS525-04
OSCaRTM User Configurable PECL Clock
Description
The ICS525-04 OSCaRTM is the most flexible way to
generate a high quality, high frequency differential
PECL clock output from a crystal or CMOS clock input.
The name OSCaRTM stands for Oscillator
Replacement, as it is designed to replace crystal
oscillators in almost any electronic system. Users can
easily configure the device to produce nearly any
output frequency from any input frequency by
grounding or floating the select pins. Neither
microcontroller, software, nor device programmer are
needed to set the frequency. Using Phase Locked Loop
techniques, the device accepts a crystal or clock to
produce output clocks up to 156 MHz at 3.3V, keeping
them frequency locked together.
For simple multipliers to produce common frequencies,
refer to the LOCOTM family of parts, which are smaller
and more cost effective.
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
timing, use the ICS527-02.
Features
• Packaged as 28 pin SSOP (150 mil body)
• Highly accurate frequency generation
• User determines the output frequency by setting all
internal dividers
• Eliminates need for custom oscillators
• No software needed
• Pull-ups on select inputs
• Input crystal frequency of 5 - 27 MHz
• Input clock frequency of 2 - 50 MHz
• Output clock frequencies up to 156 MHz at 3.3V
• Output clock frequencies up to 200 MHz at 5V
• Very low jitter
• PECL levels set by external resistors
• Operating voltage of 3.3V or 5V
• Ideal for oscillator replacement
• Industrial temperature version available
• Advanced, low power CMOS process
Block Diagram
X1/ICLK
Crystal or
clock input X2
Crystal
Oscillator
Optional crystal capacitors
Reference
Divider
7
R6:R0
2 VDD
Phase Comparator,
Charge Pump, and
Loop Filter
VCO
Divider
560Ω
RES
VDD
VCO
Output
Divider
9
2 GND
V8:V0
3
S2:S0
VDD
82Ω
PECL
820Ω
GND
VDD
82Ω
PECL
820Ω
GND
MDS 525-04 B
1
Revision 091802
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 295-9800 ● www.icst.com
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