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813252CKI-02 Datasheet(PDF) 1 Page - Integrated Device Technology

Part # 813252CKI-02
Description  VCXO JITTER ATTENUATOR & FEMTOCLOCK??MULTIPLIER
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

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VCXO JITTER ATTENUATOR &
ICS813252I-02
IDT/ ICSVCXO JITTER ATTENUATOR/MULTIPLIER
1
CS813252CKI-02 REV. A OCTOBER 22, 2008
FEMTOCLOCK™ MULTIPLIER
GENERAL DESCRIPTION
The
ICS813252I-02
is
a
member
of
the
HiperClockS™ family of high performance clock
solutions from IDT. The ICS813252I-02 is a PLL
based synchronous multiplier that is optimized for
PDH or SONET to Ethernet clock jitter attenuation
and frequency translation. The device contains two internal
frequency multiplication stages that are cascaded in series.
The first stage is a VCXO PLL that is optimized to provide
reference clock jitter attenuation. The second stage is a
FemtoClock™ frequency multiplier that provides the low jitter,
high frequency Ethernet output clock that easily meets Gigabit
and 10 Gigabit Ethernet jitter requirements. Pre-divider and
output divider multiplication ratios are selected using device
selection control pins. The multiplication ratios are optimized
to support most common clock rates used in PDH, SONET
and Ethernet applications. The VCXO requires the use of an
external, inexpensive pullable crystal. The VCXO uses external
passive loop filter components which allows configuration of
the PLL loop bandwidth and damping characteristics. The
device is packaged in a space-saving 32-VFQFN package and
supports industrial temperature range.
PIN ASSIGNMENT
HiPerClockS™
ICS
FEATURES
• Two LVPECL outputs
Each output supports independent frequency selection at
25MHz, 125MHz, 156.25MHz and 312.5MHz
Two differential inputs support the following input types:
LVPECL, LVDS, LVHSTL, SSTL, HCSL
Accepts input frequencies from 8kHz to 155.52MHz including
8kHz, 1.544MHz, 2.048MHz, 19.44MHz, 25MHz, 77.76MHz,
125MHz and 155.52MHz
Attenuates the phase jitter of the input clock by using a low-
cost pullable fundamental mode VCXO crystal
• VCXO PLL bandwidth can be optimized for jitter attenuation
and reference tracking using external loop filter connection
FemtoClock frequency multiplier provides low jitter, high
frequency output
Absolute pull range: 50ppm
• FemtoClock VCO frequency: 625MHz
RMS phase jitter @ 125MHz, using a 25MHz crystal
(10kHz – 20MHz): 1.3ps (maximum)
• 3.3V supply voltage
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
VEE
nQB
QB
VCCO
nQA
QA
VEE
ODASEL_0
ICS813252I-02
LF1
LF0
ISET
VEE
CLK_SEL
VCC
RESERVED
VEE
32-Lead VFQFN
5mm x 5mm x 0.925 package body
K Package
Top View


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