ICS8535-31 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.
ICS8535-31
LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/
LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
GENERAL DESCRIPTION
ICS
The ICS8535-31 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 ICS8535-31 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 ICS8535-31 ideal for those applications demand-
ing well defined performance and repeatability.
FEATURES
• 4 differential 3.3V LVPECL outputs
• Selectable LVCMOS/LVTTL CLK or crystal inputs
• CLK can accept the following input levels: LVCMOS, LVTTL
• Maximum output frequency: 266MHz
• Output skew: 30ps (maximum)
• Part-to-part skew: 200ps (maximum)
• Propagation delay: 1.65ns (maximum)
• Additive phase jitter, RMS: 0.057ps (typical)
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
• Lead-Free package fully RoHS compliant
• Industrial Temperature information available upon request
• Replaces the ICS8535-11
BLOCK DIAGRAM
CLK_EN ^Pullup
CLK ^Pulldown
0
XTAL_IN
OSC
1
XTAL_OUT
CLK_SEL ^Pulldown
D
Q
LE
PIN ASSIGNMENT
Q0
nQ0
Q1
nQ1
VEE 1
20 Q0
CLK_EN 2 19 nQ0
CLK_SEL 3
18 _VCC
CLK 4 17 Q1
nc 5 16 nQ1
XTAL_IN 6 15 Q2
XTAL_OUT 7 14 nQ2
nc 8
13 _VCC
nc 9 12 Q3
VCC 10 11 nQ3
Q2
ICS8535-31
nQ2
20-Lead TSSOP
Q3
6.5mm x 4.4mm x 0.92mm package body
nQ3
G Package
Top View
8535AG-31
www.icst.com/products/hiperclocks.html
1
REV. B APRIL 29, 2005