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
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 up to 266MHz
•
Output skew: 35ps (maximum)
•
Part-to-part skew: 150ps (maximum)
•
Propagation delay: 2.4ns (maximum)
•
3.3V operating supply
•
0°C to 70°C ambient operating temperature
•
Industrial Temperature information available upon request
G
ENERAL
D
ESCRIPTION
The ICS8535-11 is a low skew, high performance
1-to-4 3.3V Crystal Oscillator/LVCMOS-to-3.3V
HiPerClockS™
LVPECL fanout buffer and a member of the
HiPerClockS™ 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.
,&6
Guaranteed output and part-to-part skew characteristics
make the ICS8535-11 ideal for those applications demand-
ing well defined performance and repeatability.
B
LOCK
D
IAGRAM
CLK_EN
D
Q
LE
CLK
XTAL1
XTAL2
CLK_SEL
0
1
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
P
IN
A
SSIGNMENT
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
ICS8535-11
20-Lead TSSOP
6.5mm x 4.4mm x 0.92mm Package Body
G Package
Top View
8535AG-11
www.icst.com/products/hiperclocks.html
1
REV. B JULY 27, 2001
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
