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ICS84327AM Datasheet

  • ICS84327AM

  • CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FA...

  • 15頁

  • ICS

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PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS84327
C
RYSTAL
-
TO
-3.3V LVPECL
F
REQUENCY
S
YNTHESIZER W
/I
NTEGRATED
F
ANOUT
B
UFFER
F
EATURES
鈥?/div>
6 LVPECL outputs
鈥?/div>
Crystal oscillator interface
鈥?/div>
Output frequency range: 77.76MHz to 625MHz
鈥?/div>
Crystal input frequency: 19.44MHz, 25MHz or 25.5MHz
鈥?/div>
RMS phase jitter at 155.52MHz, using a 19.44MHz crystal
(12KHz to 20MHz): 3.4ps (typical)
Phase noise:
Offset
Noise Power
100Hz .................. -92 dBc/Hz
1KHz ................ -105 dBc/Hz
10KHz ................ -122 dBc/Hz
100KHz ................ -123 dBc/Hz
鈥?/div>
Full 3.3V or 3.3V core, 2.5V output supply mode
鈥?/div>
0擄C to 70擄C ambient operating temperature
鈥?/div>
Industrial temperature information available upon request
G
ENERAL
D
ESCRIPTION
The ICS84327 is a Crystal-to-3.3V LVPECL
Clock Synthesizer/Fanout Buffer designed for
HiPerClockS鈩?/div>
SONET, 10 Gigabit Fibre Channel and 10 Giga-
bit Ethernet applications and is a member of the
HiperClockS family of High Performance Clock
Solutions from ICS. The output frequency can be set using
the frequency select pins and a 19.44MHz crystal for SONET
frequencies, or a 25MHz crystal for 10 Gigabit Ethernet fre-
quencies, or a 25.5MHz crystal for a 10 Gigabit Fibre Chan-
nel. The low phase noise characteristics of the ICS84327 make
it an ideal clock for these demanding applications.
,&6
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
SEL2
X
1
1
1
1
0
0
0
0
0
SEL1
X
0
0
1
1
0
0
1
1
0
S E L0
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
XTAL1
P
IN
A
SSIGNMENT
6
Output
Divider
OSC
XTAL2
0
1
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
CCO
F_SEL0
F_SEL1
MR
XTAL1
XTAL2
F_SEL2
V
CCA
V
CC
PLL_SEL
V
EE
V
CCO
ICS84327
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.
84327AM
www.icst.com/products/hiperclocks.html
1
REV. A SEPTEMBER 18, 2003

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