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ICS843022

Description
FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR
File Size209KB,13 Pages
ManufacturerICS ( IDT )
Websitehttp://www.icst.com
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ICS843022 Overview

FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR

PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
F
EATURES
1 differential 3.3V LVPECL output
Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
Output frequencies: 125MHz or 62.5MHz (selectable)
RMS phase jitter @ 125MHz, using a 25MHz crystal
(12KHz - 20MHz): 0.62ps (typical)
RMS phase noise at 125MHz (typical)
Offset
Noise Power
100Hz ............... -94.6 dBc/Hz
1KHz .............. -122.8 dBc/Hz
10KHz .............. -132.2 dBc/Hz
100KHz .............. -132.0 dBc/Hz
3.3V operating supply
0°C to 70°C ambient operating temperature
Industrial temperature information available upon request
G
ENERAL
D
ESCRIPTION
The ICS843022 is a Fibre Channel Clock Generator
and a member of the HiPerClocks
TM
family of high
HiPerClockS™
performance devices from ICS. The ICS843022
uses a 25MHz crystal to synthesize 125MHz or
62.5MHz. The ICS843022 has excellent phase
jitter performance, over the 12KHz – 20MHz integration range.
The ICS843022 is packaged in a small 8-pin TSSOP, making
it ideal for use in systems with limited board space.
ICS
F
UNCTION
T
ABLE
Inputs
FREQ_SEL
0
1
Output Frequencies
(with a 25MHz crystal)
125MHz
62.5MHz
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
V
CCA
V
EE
XTAL_OUT
XTAL_IN
1
2
3
4
8
7
6
5
V
CC
Q0
nQ0
FREQ_SEL
XTAL_IN
OSC
XTAL_OUT
Output
Divider
nQ0
Q0
ICS843022
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
FREQ_SEL
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
843022AG
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 30, 2004
1

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