ICS502 Integrated Circuit System, ICS502 Datasheet

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ICS502

Manufacturer Part Number
ICS502
Description
Loco (tm) PLL Clock Multiplier
Manufacturer
Integrated Circuit System
Datasheet

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Description
MDS 502 E
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA •9 5126 • (408) 295-9800te l • www.icst.com
The ICS502 LOCO™ is the most cost effective way to
generate a high quality, high frequency clock output
and a reference from a low 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 160 MHz.
Stored in the chip’s ROM is the ability to generate 6
different multiplication factors, allowing one chip to
output many common frequencies (see page 2).
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 ICS570B.
Block Diagram
crystal
or clock
S1, S0
X1/ICLK
X2
Oscillator
VDD
Crystal
2
GND
and Control
Synthesis
1
Circuitry
Clock
PLL
LOCO™ PLL Clock Multiplier
• Packaged as 8 pin SOIC or die
• ICS’ lowest cost PLL clock plus reference
• Zero ppm multiplication error
• Easy to cascade with other 5xx series
• Input crystal frequency of 5 - 27 MHz
• Input clock frequency of 2 - 50 MHz
• Output clock frequencies up to 160 MHz
• Low jitter - 50 ps one sigma
• Compatible with all popular CPUs
• Duty cycle of 45/55 up to 160 MHz
• Operating voltages of 3.0 to 5.5V
• Industrial temperature version available
• 25mA drive capability at TTL levels
• Advanced, low power CMOS process
Features
Output
Output
Buffer
Buffer
Revision 021402
ICS502
CLK
REF

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ICS502 Summary of contents

Page 1

... Description The ICS502 LOCO™ is the most cost effective way to generate a high quality, high frequency clock output and a reference from a low frequency crystal or clock input. The name LOCO stands for LOw Cost Oscillator designed to replace crystal oscillators in most electronic systems. Using Phase-Locked-Loop (PLL) ...

Page 2

... Minimum input frequency for all selections is per table on page 3. x2 ICS502 13 Revision 021402 ...

Page 3

... Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA •9 5126 • (408) 295-9800te l • www.icst.com LOCO™ PLL Clock Multiplier Conditions Minimum Referenced to GND Referenced to GND -0.5 Referenced to GND -0.5 0 ICS502MI only -40 Max of 10 seconds -65 3 ICLK (Pin 1) (VDD/2)+1 ICLK (Pin ...

Page 4

... External Components / Crystal Selection The ICS502 requires a 0.01µF decoupling capacitor to be connected between VDD and GND. It must be connected close to the ICS502 to minimize lead inductance. No external power supply filtering is required for this device terminating resistor can be used next to the CLK pin. The total on-chip capacitance is approximately 13 pF parallel resonant, fundamental mode crystal should be used ...

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