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ICS84427CM

Description
CRYSTAL-TO-LVDS INTEGRATED FREQUENCY SYNTHESIZER/FANOUT BUFFER
File Size123KB,13 Pages
ManufacturerICS ( IDT )
Websitehttp://www.icst.com
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ICS84427CM Overview

CRYSTAL-TO-LVDS INTEGRATED FREQUENCY SYNTHESIZER/FANOUT BUFFER

PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS84427
C
RYSTAL
-
TO
-LVDS
I
NTEGRATED
F
REQUENCY
S
YNTHESIZER
/F
ANOUT
B
UFFER
F
EATURES
Six LVDS outputs
Crystal oscillator interface
Output frequency range: 77.76MHz to 625MHz
Crystal input frequency: 19.44MHz, 25MHz or 25.5MHz
RMS phase jitter at 155.52MHz, using a 19.44MHz crystal
(12kHz to 20MHz): 3.4ps (typical)
Phase noise:
Offset
Noise Power
100Hz ................. -95 dBc/Hz
1kHz ............... -110 dBc/Hz
10kHz ............... -120 dBc/Hz
100kHz ............... -121 dBc/Hz
3.3V supply voltage
0°C to 70°C ambient operating temperature
Industrial temperature information available upon request
Available in both standard and lead-free RoHS-compliant
packages
G
ENERAL
D
ESCRIPTION
The ICS84427 is a Crystal-to-LVDS Frequency
Synthesizer/Fanout Buffer and a member of the
HiPerClockS™
HiPerClockS™ family of High Performance Clock
Solutions from ICS. The output frequency can be
programmed using the frequency select pins. The
low phase noise characteristics of the ICS84427 make it an
ideal clock source for 10 Gigabit Ethernet, 10 Gigabit Fibre
Channel, OC3 and OC12 applications.
IC
S
F
UNCTION
T
ABLE
Inputs
F_XTAL
X
19.44MHz
19.44MHz
19.44MHz
19.44MHz
25MHz
25MHz
25MHz
25MHz
25.5MHz
MR
1
0
0
0
0
0
0
0
0
0
F_SEL2
X
1
1
1
1
0
0
0
0
0
F_SEL1 F_SEL0
X
0
0
1
1
0
0
1
1
0
X
0
1
0
1
0
1
0
1
1
Output
Frequency
F_OUT
LOW
77.76MHz
155.52MHz
311.04MHz
622.08MHz
78.125MHz
156.25MHz
312.5 MHz
625MHz
159.375MHz
B
LOCK
D
IAGRAM
XTAL_IN
P
IN
A
SSIGNMENT
0
1
6
Output
Divider
OSC
XTAL_OUT
PLL
/
6
/
Q0:Q5
nQ0:nQ5
Feedback
Divider
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
Q4
nQ4
Q5
nQ5
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
DD
F_SEL0
F_SEL1
MR
XTAL_IN
XTAL_OUT
F_SEL2
V
DDA
V
DD
PLL_SEL
GND
V
DD
ICS84427
24-Lead, 300-MIL SOIC
7.5mm x 15.33mm x 2.3mm body package
M Package
Top View
F_SEL2 MR
PLL_SEL
F_SEL1
F_SEL0
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.
84427CM
www.icst.com/products/hiperclocks.html
1
REV. D NOVEMBER 30, 2005

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Description CRYSTAL-TO-LVDS INTEGRATED FREQUENCY SYNTHESIZER/FANOUT BUFFER CRYSTAL-TO-LVDS INTEGRATED FREQUENCY SYNTHESIZER/FANOUT BUFFER CRYSTAL-TO-LVDS INTEGRATED FREQUENCY SYNTHESIZER/FANOUT BUFFER CRYSTAL-TO-LVDS INTEGRATED FREQUENCY SYNTHESIZER/FANOUT BUFFER CRYSTAL-TO-LVDS INTEGRATED FREQUENCY SYNTHESIZER/FANOUT BUFFER

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