84427BM
www.icst.com/products/hiperclocks.html
REV. B APRIL 23, 2003
1
Integrated
Circuit
Systems, Inc.
ICS84427
C
RYSTAL
-
TO
-LVDS
I
NTEGRATED
F
REQUENCY
S
YNTHESIZER
/F
ANOUT
B
UFFER
PRELIMINARY
G
ENERAL
D
ESCRIPTION
The ICS84427 is a Crystal-to-LVDS Frequency Syn-
thesizer/Fanout Buffer and a member of the
HiPerClockSTM family of High Performance Clock
Solutions from ICS. The output frequency can be pro-
grammed 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.
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
F
EATURES
6 LVDS outputs
Crystal oscillator interface
Output frequency range: 77.76MHz to 625MHz
Crystal input frequency: 19.44MHz, 25MHz or 25.5MHz
Cycle-to-cycle jitter: 25ps (typical)
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
0C to 70C ambient operating temperature
Industrial temperature information available upon request
HiPerClockSTM
,&6
Q0:Q5
ICS84427
24-Lead, 300-MIL SOIC
7.5mm x 15.33mm x 2.3mm body package
M Package
Top View
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
Q4
nQ4
Q5
nQ5
1
2
3
4
5
6
7
8
9
10
11
12
V
DD
F_SEL0
F_SEL1
MR
XTAL1
XTAL2
F_SEL2
V
DDA
V
DD
PLL_SEL
GND
V
DD
PLL
6
/
Feedback
Divider
OSC
6
/
Output
Divider
0
1
XTAL1
XTAL2
F_SEL2
PLL_SEL
MR
F_SEL0
nQ0:nQ5
24
23
22
21
20
19
18
17
16
15
14
13
F_SEL1
F
UNCTION
T
ABLE
s
t
u
p
n
I
t
u
p
t
u
O
y
c
n
e
u
q
e
r
F
L
A
T
X
_
F
R
M
2
L
E
S
_
F
1
L
E
S
_
F
0
L
E
S
_
F
T
U
O
_
F
X
1
X
X
X
W
O
L
z
H
M
4
4
.
9
1
0
1
0
0
z
H
M
6
7
.
7
7
z
H
M
4
4
.
9
1
0
1
0
1
z
H
M
2
5
.
5
5
1
z
H
M
4
4
.
9
1
0
1
1
0
z
H
M
4
0
.
1
1
3
z
H
M
4
4
.
9
1
0
1
1
1
z
H
M
8
0
.
2
2
6
z
H
M
5
2
0
0
0
0
z
H
M
5
2
1
.
8
7
z
H
M
5
2
0
0
0
1
z
H
M
5
2
.
6
5
1
z
H
M
5
2
0
0
1
0
z
H
M
5
.
2
1
3
z
H
M
5
2
0
0
1
1
z
H
M
5
2
6
z
H
M
5
.
5
2
0
0
0
1
z
H
M
5
7
3
.
9
5
1
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.
84427BM
www.icst.com/products/hiperclocks.html
REV. B APRIL 23, 2003
3
Integrated
Circuit
Systems, Inc.
ICS84427
C
RYSTAL
-
TO
-LVDS
I
NTEGRATED
F
REQUENCY
S
YNTHESIZER
/F
ANOUT
B
UFFER
PRELIMINARY
T
ABLE
3A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
DD
= V
DDA
= 3.3V5%, T
A
= 0C
TO
70C
T
ABLE
3B. LVCMOS / LVTTL DC C
HARACTERISTICS
,
V
DD
= V
DDA
= 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
i
t
i
d
n
o
C
t
s
e
T
m
u
m
i
n
i
M
l
a
c
i
p
y
T
m
u
m
i
x
a
M
s
t
i
n
U
V
D
D
e
g
a
t
l
o
V
y
l
p
p
u
S
e
r
o
C
5
3
1
.
3
3
.
3
5
6
4
.
3
V
V
A
D
D
e
g
a
t
l
o
V
y
l
p
p
u
S
g
o
l
a
n
A
5
3
1
.
3
3
.
3
5
6
4
.
3
V
I
D
D
t
n
e
r
r
u
C
y
l
p
p
u
S
r
e
w
o
P
5
3
2
A
m
I
A
D
D
t
n
e
r
r
u
C
y
l
p
p
u
S
g
o
l
a
n
A
0
2
A
m
l
o
b
m
y
S
r
e
t
e
m
a
r
a
P
s
n
o
i
t
i
d
n
o
C
t
s
e
T
m
u
m
i
n
i
M
l
a
c
i
p
y
T
m
u
m
i
x
a
M
s
t
i
n
U
V
H
I
e
g
a
t
l
o
V
h
g
i
H
t
u
p
n
I
,
R
M
,
L
E
S
_
L
L
P
1
L
E
S
_
F
,
0
L
E
S
_
F
2
V
D
D
3
.
0
+
V
V
L
I
e
g
a
t
l
o
V
w
o
L
t
u
p
n
I
,
R
M
,
L
E
S
_
L
L
P
1
L
E
S
_
F
,
0
L
E
S
_
F
3
.
0
-
8
.
0
V
I
H
I
t
n
e
r
r
u
C
h
g
i
H
t
u
p
n
I
1
L
E
S
_
F
,
R
M
V
D
D
V
=
N
I
V
5
6
4
.
3
=
0
5
1
A
0
L
E
S
_
F
,
L
E
S
_
L
L
P
V
D
D
V
=
N
I
V
5
6
4
.
3
=
5
A
I
L
I
t
n
e
r
r
u
C
w
o
L
t
u
p
n
I
1
L
E
S
_
F
,
R
M
V
D
D
V
,
V
5
6
4
.
3
=
N
I
V
0
=
5
-
A
0
L
E
S
_
F
,
L
E
S
_
L
L
P
V
D
D
V
,
V
5
6
4
.
3
=
N
I
V
0
=
0
5
1
-
A
T
ABLE
3C. LVDS DC C
HARACTERISTICS
,
V
DD
= V
DDA
= 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
i
t
i
d
n
o
C
t
s
e
T
m
u
m
i
n
i
M
l
a
c
i
p
y
T
m
u
m
i
x
a
M
s
t
i
n
U
V
D
O
e
g
a
t
l
o
V
t
u
p
t
u
O
l
a
i
t
n
e
r
e
f
f
i
D
0
5
2
0
0
4
0
0
6
V
m
V
D
O
V
D
O
e
g
n
a
h
C
e
d
u
t
i
n
g
a
M
0
5
V
m
V
S
O
e
g
a
t
l
o
V
t
e
s
f
f
O
4
.
1
V
V
S
O
V
S
O
e
g
n
a
h
C
e
d
u
t
i
n
g
a
M
0
5
V
m
A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
DD
4.6V
Inputs, V
I
-0.5V to V
DD
+ 0.5 V
Outputs, V
O
-0.5V to V
DD
+ 0.5V
Package Thermal Impedance,
JA
50C/W (0 lfpm)
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.
84427BM
www.icst.com/products/hiperclocks.html
REV. B APRIL 23, 2003
5
Integrated
Circuit
Systems, Inc.
ICS84427
C
RYSTAL
-
TO
-LVDS
I
NTEGRATED
F
REQUENCY
S
YNTHESIZER
/F
ANOUT
B
UFFER
PRELIMINARY
T
YPICAL
P
HASE
N
OISE
19.44MHz Input
RMS Phase Noise Jitter
12K to 20MHz = 3.4ps (typical)
25MHz Input
RMS Phase Noise Jitter
12K to 20MHz = 3.1ps (typical)
78.125MHz
156.25MHz
312.5MHz
625MHz
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
10
100
1k
10k
100k
1M
10M
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
10
100
1k
10k
100k
1M
10M
O
FFSET
F
REQUENCY
(H
Z
)
P
HASE
N
OISE
(
dBc
)
H
Z
O
FFSET
F
REQUENCY
(H
Z
)
P
HASE
N
OISE
(
dBc
)
H
Z
77.76MHz
155.52MHz
311.04MHz
622.08MHz
PDF 
ZIP
