ICS2059-02 Datasheet, PDF (1/11 Pages) Integrated Circuit Systems – Clock Multiplier and Jitter Attenuator

ICS2059-02
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.
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
ISET
Pullable Crystal
X1
X2
VDD
VDD ³
Input Clock ^ICLK2
1
Input Clock ^ICLK1
0
Phase
Detector
VCXO
Selectable
Divider
CLK
ISEL
Charge
Pump
2
SEL1:0
CHGP
VIN
GND 2
MDS 2059-02 C
1
Revision 031605
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel [phone] ● www.icst.com