843022AG
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 30, 2004
1
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
PRELIMINARY
G
ENERAL
D
ESCRIPTION
The ICS843022 is a Fibre Channel Clock Generator
and a member of the HiPerClocks
TM
family of high
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.
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
0C to 70C ambient operating temperature
Industrial temperature information available upon request
HiPerClockSTM
ICS
ICS843022
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
V
CCA
V
EE
XTAL_OUT
XTAL_IN
1
2
3
4
V
CC
Q0
nQ0
FREQ_SEL
8
7
6
5
OSC
Output
Divider
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
XTAL_IN
XTAL_OUT
nQ0
Q0
FREQ_SEL
s
t
u
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M
5
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a
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(
L
E
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R
F
0
z
H
M
5
2
1
1
z
H
M
5
.
2
6
F
UNCTION
T
ABLE
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
3
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
PRELIMINARY
T
ABLE
3A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
CC
= 3.3V5%, T
A
=0C
TO
70C
l
o
b
m
y
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r
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3
1
.
3
3
.
3
5
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3
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r
e
w
o
P
5
8
A
m
T
ABLE
3C. LVPECL DC C
HARACTERISTICS
,
V
CC
= 3.3V5%, T
A
=0C
TO
70C
l
o
b
m
y
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;
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C
4
.
1
-
V
C
C
9
.
0
-
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V
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O
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;
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0
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-
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C
C
7
.
1
-
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V
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0
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t
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O
:
1
E
T
O
N
V
o
t
C
C
.
V
2
-
T
ABLE
4. C
RYSTAL
C
HARACTERISTICS
r
e
t
e
m
a
r
a
P
s
n
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5
2
z
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M
)
R
S
E
(
e
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n
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E
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a
p
a
C
t
n
u
h
S
7
F
p
A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
CC
4.6V
Inputs, V
I
-0.5V to V
CC
+ 0.5V
Outputs, I
O
Continuous Current
50mA
Surge Current
100mA
Package Thermal Impedance,
JA
101.7C/W (0 mps)
Storage Temperature, T
STG
-65C to 150C
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Functional
operation of product at these conditions or any conditions be-
yond those listed in the
DC Characteristics or AC Character-
istics is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect product reliability.
T
ABLE
3B. LVCMOS/LVTTL DC C
HARACTERISTICS
,
V
CC
= 3.3V5%, T
A
=0C
TO
70C
l
o
b
m
y
S
r
e
t
e
m
a
r
a
P
s
n
o
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t
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t
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m
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m
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p
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p
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2
V
C
C
3
.
0
+
V
V
L
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a
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l
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w
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t
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p
n
I
3
.
0
-
8
.
0
V
I
H
I
t
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r
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C
h
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n
I
L
E
S
_
Q
E
R
F
V
C
C
V
=
N
I
V
5
6
4
.
3
=
0
5
1
A
I
L
I
t
n
e
r
r
u
C
w
o
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t
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p
n
I
L
E
S
_
Q
E
R
F
V
C
C
V
,
V
5
6
4
.
3
=
N
I
V
0
=
5
-
A
843022AG
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 30, 2004
5
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
PRELIMINARY
T
YPICAL
P
HASE
N
OISE
AT
125MH
Z
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
100
1k
10k
100k
1M
10M
100M
125MHz
RMS Phase Jitter (Random)
12KHz to 20MHz = 0.62ps (typical)
O
FFSET
F
REQUENCY
(H
Z
)
N
OISE
P
O
WER
dBc
Hz
Phase Noise Result by adding
Fibre Channel Filter to raw data
Raw Phase Noise Data
Fibre Channel Filter
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