ICS8535-11 Datasheet, PDF (1/14 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/ LVCMOS-TO-3.3V LVPECL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS8535-11
LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/
LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
GENERAL DESCRIPTION
The ICS8535-11 is a low skew, high performance
,&6
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.
Guaranteed output and part-to-part skew characteristics
make the ICS8535-11 ideal for those applications demand-
ing well defined performance and repeatability.
FEATURES
• 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
BLOCK DIAGRAM
CLK_EN
CLK
0
XTAL1
1
XTAL2
CLK_SEL
D
Q
LE
PIN ASSIGNMENT
V_EE 1
CLK_EN 2
20 Q0
19 _nQ0
CLK_SEL 3
CLK 4
18 V
CC
17 Q1
Q0
nc 5 16 nQ1
nQ0
XTAL1 6 15 Q2
Q1
nQ1
XTAL2 7
nc 8
nc 9
14 _nQ2
13 _VCC
12 Q3
Q2
V_CC 10 11 nQ3
nQ2
ICS8535-11
Q3
20-Lead TSSOP
nQ3
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