PRELIMINARY
LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/
ICS8533I-31
DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
General Description
Features
The ICS8533I-31 is a low skew, high performance
• Four differential LVPECL output pairs
S
IC
1-to-4 Crystal Oscillator/Differential-to-3.3V
LVPECL Fanout Buffer and a member of the
HiPerClockS™ family of High Performance Clock
Solutions from IDT. The ICS8533I-31 has selectable
• Selectable differential CLK/nCLK or crystal oscillator interface
• Maximum output frequency: 650MHz
HiPerClockS™
• Translates any single-ended input signal to 3.3V LVPECL levels
with resistor bias on nCLK input
differential clock or crystal inputs. The CLK, nCLK pair can accept
most standard differential input levels. The clock enable is
internally synchronized to eliminate runt pulses on the outputs
during asynchronous assertion/deassertion of the clock enable
pin.
• Additive phase jitter, RMS: TBD
• Output skew: 25ps (typical)
• Part-to-part skew: 150ps (typical)
• Propagation delay: 1.5ns (typical)
• Full 3.3V supply mode
Guaranteed output and part-to-part skew characteristics make the
ICS8533I-31 ideal for those applications demanding well defined
performance and repeatability.
• -40°C to 85°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
Pin Assignment
Block Diagram
Pullup
CLK_EN
D
VEE
CLK_EN
CLK_SEL
CLK
1
2
20 Q0
Q
19
nQ0
LE
3
4
18
17
VCC
Q1
Pulludown
CLK
0
1
Q0
Pullup
nCLK
nCLK
XTAL_IN
XTAL_OUT
5
6
7
8
9
16 nQ1
nQ0
15
14
13
Q2
nQ2
VCC
XTAL_IN
Q1
nc
nc
VCC 10
OSC
nQ1
12 Q3
11
nQ3
XTAL_OUT
CLK_SEL
Q2
Pulludown
nQ2
ICS8533I-31
20-Lead TSSOP
Q3
6.5mm x 4.4mm x 0.925mm
package body
nQ3
G Package
Top View
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization and/or qualification.
Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT™ / ICS™ 3.3V LVPECL FANOUT BUFFER
1
ICS8533AGI-31 REV. A DECEMBER 13, 2007