8535AG-11
www.icst.com/products/hiperclocks.html
REV. C JANUARY 16, 2003
1
Integrated
Circuit
Systems, Inc.
ICS8535-11
L
OW
S
KEW
, 1-
TO
-4, C
RYSTAL
O
SCILLATOR
/
LVCMOS-
TO
-3.3V LVPECL F
ANOUT
B
UFFER
G
ENERAL
D
ESCRIPTION
The ICS8535-11 is a low skew, high performance
1-to-4 3.3V Crystal Oscillator/LVCMOS-to-3.3V
LVPECL fanout buffer and a member of the
HiPerClockSTM family of High Performance Clock
Solutions from ICS. The ICS8535-11 has select-
able single ended clock or crystal inputs. The single ended
clock input accepts LVCMOS or LVTTL input levels and
translate them to 3.3V LVPECL levels. The output enable is
internally synchronized to eliminate runt pulses on the out-
puts during asynchronous assertion/deassertion of the clock
enable pin.
Guaranteed output and part-to-part skew characteristics
make the ICS8535-11 ideal for those applications demand-
ing well defined performance and repeatability.
F
EATURES
4 differential 3.3V LVPECL outputs
Selectable CLK or crystal inputs
CLK can accept the following input levels: LVCMOS, LVTTL
Maximum output frequency: 266MHz
Output skew: 35ps (maximum)
Part-to-part skew: 250ps (maximum)
Propagation delay: 2.4ns (maximum)
3.3V operating supply
0C to 70C ambient operating temperature
Industrial Temperature information available upon request
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
ICS8535-11
20-Lead TSSOP
6.5mm x 4.4mm x 0.92mm package body
G Package
Top View
V
EE
CLK_EN
CLK_SEL
CLK
nc
XTAL1
XTAL2
nc
nc
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Q0
nQ0
V
CC
Q1
nQ1
Q2
nQ2
V
CC
Q3
nQ3
HiPerClockSTM
,&6
CLK
XTAL1
XTAL2
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
0
1
CLK_EN
CLK_SEL
D
Q
LE
8535AG-11
www.icst.com/products/hiperclocks.html
REV. C JANUARY 16, 2003
4
Integrated
Circuit
Systems, Inc.
ICS8535-11
L
OW
S
KEW
, 1-
TO
-4, C
RYSTAL
O
SCILLATOR
/
LVCMOS-
TO
-3.3V LVPECL F
ANOUT
B
UFFER
T
ABLE
4B. 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
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
2
V
C
C
V
3
.
0
+
V
V
L
I
e
g
a
t
l
o
V
w
o
L
t
u
p
n
I
3
.
0
-
8
.
0
V
I
H
I
t
n
e
r
r
u
C
h
g
i
H
t
u
p
n
I
,
K
L
C
L
E
S
_
K
L
C
V
N
I
V
=
C
C
V
5
6
4
.
3
=
0
5
1
A
N
E
_
K
L
C
V
N
I
V
=
C
C
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
,
K
L
C
L
E
S
_
K
L
C
V
N
I
V
,
V
0
=
C
C
V
5
6
4
.
3
=
5
-
A
N
E
_
K
L
C
V
N
I
V
,
V
0
=
C
C
V
5
6
4
.
3
=
0
5
1
-
A
T
ABLE
4C. LVPECL 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
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
O
1
E
T
O
N
;
e
g
a
t
l
o
V
h
g
i
H
t
u
p
t
u
O
V
C
C
4
.
1
-
V
C
C
-
0
.
1
V
V
L
O
1
E
T
O
N
;
e
g
a
t
l
o
V
w
o
L
t
u
p
t
u
O
V
C
C
-
0
.
2
V
C
C
-
7
.
1
V
V
G
N
I
W
S
g
n
i
w
S
e
g
a
t
l
o
V
t
u
p
t
u
O
k
a
e
P
-
o
t
-
k
a
e
P
6
.
0
0
.
1
V
0
5
h
t
i
w
d
e
t
a
n
i
m
r
e
t
s
t
u
p
t
u
O
:
1
E
T
O
N
V
o
t
C
C
.
V
2
-
T
ABLE
4A. P
OWER
S
UPPLY
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
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
C
C
e
g
a
t
l
o
V
y
l
p
p
u
S
r
e
w
o
P
5
3
1
.
3
3
.
3
5
6
4
.
3
V
I
E
E
t
n
e
r
r
u
C
y
l
p
p
u
S
r
e
w
o
P
0
5
A
m
A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
CC
4.6V
Inputs, V
I
-0.5V to V
CC
+ 0.5 V
Outputs, V
O
-0.5V to V
CC
+ 0.5V
Package Thermal Impedance,
JA
73.2C/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.
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