ICS8535I-31 Datasheet, PDF (1/15 Pages) Integrated Device Technology – LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER

LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/LVCMOS-TO-
3.3V LVPECL FANOUT BUFFER
ICS8535I-31
General Description
The ICS8535I-31 is a low skew, high performance
ICS
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 ICS8535I-31 has selectable
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 outputs during asynchronous
assertion/deassertion of the clock enable pin.
Guaranteed output and part-to-part skew characteristics make the
ICS8535I-31 ideal for those applications demanding well defined
performance and repeatability.
Features
• Four 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 (typical)
• Part-to-part skew: 200ps (maximum)
• Propagation delay: 1.75ns (maximum)
• Additive phase jitter, RMS: 0.057ps (typical)
• Full 3.3V supply mode
• -40°C to 85°C ambient operating temperature
• Replaces the ICS8535I-11
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
Block Diagram
CLK_EN ^Pullup
CLK ^Pulldown
0
XTAL_IN
OSC
1
XTAL_OUT
CLK_SEL ^Pulldown
D
Q
LE
IDT™ / ICS™ 3.3V LVPECL FANOUT BUFFER
Pin Assignment
VEE 1
20 Q0
Q0
CLK_EN 2 19 nQ0
nQ0
CLK_SEL 3
18 VCC
Q1
CLK 4 17 Q1
nQ1
nc 5 16 nQ1
XTAL_IN 6 15 Q2
Q2
XTAL_OUT 7 14 nQ2
nQ2
nc 8
13 VCC
nc 9 12 Q3
Q3
nQ3
VCC 10 11 nQ3
ICS8535I-31
20-Lead TSSOP
6.5mm x 4.4mm x 0.92mm package body
G Package
Top View
1
ICS8535AGI-31 REV. A AUGUST 16, 2007