DATASHEET
CLOCK MULTIPLIER AND JITTER ATTENUATOR
Description
The ICS2059-02 is a VCXO (Voltage Controlled Crystal
Oscillator) based clock multiplier and jitter attenuator
designed for system clock distribution applications.
This monolithic IC, combined with an external
inexpensive quartz crystal, can be used to replace a
more costly hybrid VCXO retiming module. A dual input
mux is also provided.
By controlling the VCXO frequency within a
phase-locked loop (PLL), the output clock is phase and
frequency locked to the input clock. Through selection
of external loop filter components, the PLL loop
bandwidth and damping factor can be tailored to meet
system clock requirements. A loop bandwidth down to
the Hz range is possible.
ICS2059-02
Features
•
Excellent jitter attenuation for telecom and video
clocks
•
2:1 Input MUX for input reference clocks
•
No switching glitches on output
•
VCXO-based clock generation offers very low jitter
and phase noise generation
•
Output clock is phase and frequency locked to the
selected input reference clock
•
Fixed input to output phase relationship
•
+115 ppm minimum crystal frequency pullability
range, using recommended crystal
•
•
•
•
Industrial temperature range
Low power CMOS technology
16-pin TSSOP package
Single 3.3 V power supply
Block Diagram
Pullable Crystal
VDD
VDD
3
ISET
Input Clock ICLK2
Input Clock ICLK1
ISEL
X1
X2
1
0
Phase
Detector
Charge
Pump
VCXO
Selectable
Divider
CLK
SEL1:0
2
CHGP
VIN
GND
2
IDT™ / ICS™
CLOCK MULTIPLIER AND JITTER ATTENUATOR
1
ICS2059-02
REV E 051310
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
